SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  Schedule 13G

                    Under the Securities Exchange Act of 1934

                             KRONOS WORLDWIDE, INC.
                                (Name of Issuer)

                          Common Stock, $0.01 par value
                         (Title of Class of Securities)

                                   50105F 10 5
                                 (CUSIP Number)

                                December 31, 2003
                      (Date of Event which requires Filing
                               of this Statement)

     Check the  appropriate  box to  designate  the rule  pursuant to which this
Schedule is filed:

         [   ]        Rule 13d-1(b)

         [   ]        Rule 13d-1(c)

         [ X ]        Rule 13d-1(d)

     *The  remainder  of this cover  page  shall be filled  out for a  reporting
person's  initial  filing on this  form with  respect  to the  subject  class of
securities,  and for any subsequent amendment containing information which would
alter disclosures provided in a prior cover page.

     The  information  required on the remainder of this cover page shall not be
deemed to be "filed"  for the purpose of Section 18 of the  Securities  Exchange
Act of 1934 ("Act") or otherwise  subject to the  liabilities of that section of
the Act but shall be subject to all other  provisions of the Act  (however,  see
the Notes).

CUSIP No.  50105F 10 5

     1       NAME OF REPORTING PERSON

                      NL Industries, Inc.

                      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)


     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       CITIZENSHIP OR PLACE OF ORGANIZATION

                      New Jersey

                               5      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               6      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    25,047,507
           EACH
        REPORTING              7      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               8      SHARED DISPOSITIVE POWER

                                                     25,047,507

     9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      25,047,507

    10       CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN
             SHARES  [  ]

    11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                      51.2%

    12       TYPE OF REPORTING PERSON

                      CO

CUSIP No.  50105F 10 5

     1       NAME OF REPORTING PERSON

                      Tremont LLC

                      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)


     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               5      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               6      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    30,155,277
           EACH
        REPORTING              7      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               8      SHARED DISPOSITIVE POWER

                                                     30,155,277

     9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      30,155,277

    10       CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN
             SHARES  [  ]

    11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                      61.6%

    12       TYPE OF REPORTING PERSON

                      OO

CUSIP No.  50105F 10 5

     1       NAME OF REPORTING PERSON

                      Valhi, Inc.

                      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)


     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               5      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               6      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    45,527,072
           EACH
        REPORTING              7      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               8      SHARED DISPOSITIVE POWER

                                                     45,527,072

     9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      45,527,072

    10       CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN
             SHARES  [  ]

    11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                      93.0%

    12       TYPE OF REPORTING PERSON

                      CO

CUSIP No.  50105F 10 5

     1       NAME OF REPORTING PERSON

                      Valhi Group, Inc.

                      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)


     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Nevada

                               5      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               6      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    45,527,072
           EACH
        REPORTING              7      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               8      SHARED DISPOSITIVE POWER

                                                     45,527,072

     9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      45,527,072

    10       CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN
             SHARES  [  ]

    11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                      93.0%

    12       TYPE OF REPORTING PERSON

                      CO

CUSIP No.  50105F 10 5

     1       NAME OF REPORTING PERSON

                      National City Lines, Inc.

                      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)


     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               5      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               6      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    45,527,072
           EACH
        REPORTING              7      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               8      SHARED DISPOSITIVE POWER

                                                     45,527,072

     9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      45,527,072

    10       CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN
             SHARES  [  ]

    11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                      93.0%

    12       TYPE OF REPORTING PERSON

                      CO

CUSIP No.  50105F 10 5

     1       NAME OF REPORTING PERSON

                      NOA, Inc.

                      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)


     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Texas

                               5      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               6      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    45,527,072
           EACH
        REPORTING              7      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               8      SHARED DISPOSITIVE POWER

                                                     45,527,072

     9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      45,527,072

    10       CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN
             SHARES  [  ]

    11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                      93.0%

    12       TYPE OF REPORTING PERSON

                      CO

CUSIP No.  50105F 10 5

     1       NAME OF REPORTING PERSON

                      Dixie Holding Company

                      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)


     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               5      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               6      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    45,527,072
           EACH
        REPORTING              7      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               8      SHARED DISPOSITIVE POWER

                                                     45,527,072

     9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      45,527,072

    10       CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN
             SHARES  [  ]

    11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                      93.0%

    12       TYPE OF REPORTING PERSON

                      CO

CUSIP No.  50105F 10 5

     1       NAME OF REPORTING PERSON

                      Dixie Rice Agricultural Corporation, Inc.

                      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)


     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Louisiana

                               5      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               6      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    45,527,072
           EACH
        REPORTING              7      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               8      SHARED DISPOSITIVE POWER

                                                     45,527,072

     9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      45,527,072

    10       CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN
             SHARES  [  ]

    11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                      93.0%

    12       TYPE OF REPORTING PERSON

                      CO

CUSIP No.  50105F 10 5

     1       NAME OF REPORTING PERSON

                      Southwest Louisiana Land Company, Inc.

                      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)


     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Louisiana

                               5      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               6      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    45,527,072
           EACH
        REPORTING              7      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               8      SHARED DISPOSITIVE POWER

                                                     45,527,072

     9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      45,527,072

    10       CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN
             SHARES  [  ]

    11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                      93.0%

    12       TYPE OF REPORTING PERSON

                      CO

CUSIP No.  50105F 10 5

     1       NAME OF REPORTING PERSON

                      Contran Corporation

                      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)


     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               5      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               6      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    45,527,072
           EACH
        REPORTING              7      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               8      SHARED DISPOSITIVE POWER

                                                     45,527,072

     9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      45,527,072

    10       CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN
             SHARES  [  ]

    11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                      93.0%

    12       TYPE OF REPORTING PERSON

                      CO

CUSIP No.  50105F 10 5

     1       NAME OF REPORTING PERSON

                      The Combined Master Retirement Trust

                      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)


     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Texas

                               5      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               6      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    45,527,072
           EACH
        REPORTING              7      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               8      SHARED DISPOSITIVE POWER

                                                     45,527,072

     9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      45,527,072

    10       CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN
             SHARES  [  ]

    11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                      93.0%

    12       TYPE OF REPORTING PERSON

                      EP

CUSIP No.  50105F 10 5

     1       NAME OF REPORTING PERSON

                      Harold Simmons Foundation, Inc.

                      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)


     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Texas

                               5      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               6      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    45,527,072
           EACH
        REPORTING              7      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               8      SHARED DISPOSITIVE POWER

                                                     45,527,072

     9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      45,527,072

    10       CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN
             SHARES  [  ]

    11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                      93.0%

    12       TYPE OF REPORTING PERSON

                      CO

CUSIP No.  50105F 10 5

     1       NAME OF REPORTING PERSON

                      Harold C. Simmons

                      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)


     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       CITIZENSHIP OR PLACE OF ORGANIZATION

                      USA

                               5      SOLE VOTING POWER

                                                          3,000
        NUMBER OF
          SHARES               6      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    45,561,809
           EACH
        REPORTING              7      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                           3,000

                               8      SHARED DISPOSITIVE POWER

                                                     45,561,809

     9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      3,000

    10       CHECK IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN
             SHARES  [ X ]

    11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                      0.0%

    12       TYPE OF REPORTING PERSON

                      IN

                                                   SCHEDULE 13G

Item 1(a).    Name of Issuer:

              Kronos Worldwide, Inc., a Delaware corporation (the "Company").

Item 1(b).    Address of Issuer's Principal Executive Offices:

              Three Lincoln Centre
              5430 LBJ Freeway, Suite 1700
              Dallas, Texas   75240-2697

Items 2(a).   Name of Person Filing:

              The following  entities or person  (collectively,  the  "Reporting
              Persons") are filing this statement:

                 (i)    NL  Industries,  Inc. ("NL"),  Valhi,  Inc. ("Valhi) and
                        Tremont  LLC  ("Tremont")  as direct  holders  of shares
                        ("Shares") of common  stock,  par value $0.01 per share,
                        of the Company;

                 (ii)   Valhi  Group,  Inc. ("VGI"),  National  City Lines, Inc.
                        ("National"),  NOA, Inc. ("NOA"),  Dixie Holding Company
                        ("Dixie Holding"),  Dixie Rice Agricultural Corporation,
                        Inc. ("Dixie Rice"),  Southwest  Louisiana Land Company,
                        Inc. ("Southwest"), Contran Corporation ("Contran"), The
                        Combined  Master  Retirement  Trust (the "CMRT") and the
                        Harold Simmons  Foundation,  Inc. (the  "Foundation") by
                        virtue of their indirect ownership of NL and Tremont and
                        their direct or indirect ownership of Valhi; and

                 (iii)  Harold  C.  Simmons  by  virtue  of his  positions  with
                        Contran and certain of the other  entities (as described
                        in this statement).

Item 2(b).    Address of Principal Business Office or, if none, Residence:

              The  principal  business  office  of  NL,  Tremont,   Valhi,  VGI,
              National, NOA, Dixie Holding, Contran, the CMRT and the Foundation
              are located at, and the business  address of Harold C. Simmons is,
              Three Lincoln Centre, 5430 LBJ Freeway,  Suite 1700, Dallas, Texas
              75240-2697.  The principal  business  address of Dixie Rice is 600
              Pasquiere Street, Gueydan, Louisiana 70542. The principal business
              address of Southwest is 402 Canal Street, Houma, Louisiana 70360.

Item 2(c).    Citizenship:

              Contran,   Dixie   Holding,   National   and  Valhi  are  Delaware
              corporations.  NL  is  a  New  Jersey  corporation.  Tremont  is a
              Delaware limited liability company.  VGI is a Nevada  corporation.
              NOA  is  a  Texas  corporation  and  the  Foundation  is  a  Texas
              non-profit  corporation.  Dixie Rice and  Southwest  are Louisiana
              corporations.  The CMRT is  governed  by the laws of the  state of
              Texas,  except as those laws are superseded by federal law. Harold
              C. Simmons is a citizen of the United States.

Item 2(d).    Title of Class of Securities:

              Common stock, par value $0.01 per share.

Item 2(e).    CUSIP Number:

              50105F 10 5

Item 3.       If this statement is  filed pursuant to  sections  240.13d-1(b) or
              240.13d-2(b) or (c), check whether the person filing is a:

                          
              (a)      [   ]        Broker or dealer  registered  under  section
                                    15 of the Act (15  U.S.C. 78o);

              (b)      [   ]        Bank  as  defined in  section 3(a)(6) of the
                                    Act (15 U.S.C. 78c);

              (c)      [   ]        Insurance  company  as  defined  in  section
                                    3(a)(19)  of the  Act (15 U.S.C. 78c);

              (d)      [   ]        Investment Company registered  under section
                                    8 of  the Investment Company  Act (15 U.S.C.
                                    80a-8);

              (e)      [   ]        Investment   adviser    in  accordance  with
                                    section 240.13d-1(b)(1)(ii)(E);

              (f)      [   ]        An employee  benefit plan or endowment  fund
                                    in accordance  with  section 240.13d-1(b)(1)
                                    (ii)(F);

              (g)      [   ]        A parent holding  company or control  person
                                    in accordance  with section  240.13d-1(b)(1)
                                    (ii)(G);

              (h)      [   ]        A savings association as defined in  section
                                    3(b) of the  Federal  Deposit Insurance  Act
                                    (12 U.S.C. 1813);

              (i)      [   ]        A  church  plan  that  is excluded  from the
                                    definition  of an  investment company  under
                                    section  3(c)(14) of the  Investment Company
                                    Act of 1940 (15 U.S.C. 80a-3); or

              (j)      [   ]        Group, in  accordance with section 240.13d-1
                                    (b)(1)(ii)(J).


Item 4.       Ownership (as of December 31, 2003).

              (a)      Amount Beneficially Owned:
              (b)      Percent of Class:

                       By virtue of the  relationships  described  under  Item 7
                       of this  statement,  as of December 31, 2003:

                       (1)      NL   may  be  deemed   to  own  beneficially the
                                25,047,507  Shares  (approximately  51.2% of the
                                outstanding Shares) that NL held directly;

                       (2)      Tremont   may  be  deemed  to  own  beneficially
                                the 30,155,277  Shares  (approximately  61.6% of
                                the outstanding Shares) that NL and Tremont held
                                directly;

                       (3)      Valhi, VGI, National,  NOA, Dixie Holding, Dixie
                                Rice, Southwest,  Contran,  the   CMRT  and  the
                                Foundation  may  be  deemed to  own beneficially
                                the  45,527,072  Shares (approximately  93.0% of
                                the  outstanding  Shares)  that  NL,  Valhi  and
                                Tremont held directly; and

                       (4)      Harold  C.  Simmons  may   be  deemed  to    own
                                beneficially     the       45,564,809     Shares
                               (approximately 93.1% of the  outstanding  Shares)
                                that NL, Valhi, Tremont, his  spouse and he held
                                directly.

              (c)      Number of shares as to which the person has:

                       (i)      Sole power to vote or to direct the vote:

                                As of December 31,  2003,  Harold C. Simmons had
                                the sole power to vote or direct the disposition
                                of 3,000 Shares.

                       (ii)     Shared power to vote or to direct the vote:

                                By  virtue   of   the  relationships   described
                                under Item 7 of  this  statement, as of December
                                31, 2003:

                                (1)      NL may be deemed  to  share  the  power
                                         to vote or direct  the  disposition  of
                                         the  25,047,507  Shares  (approximately
                                         51.2% of the  outstanding  Shares) that
                                         NL held directly;

                                (2)      Tremont  may be  deemed  to  share  the
                                         power to vote or direct the disposition
                                         of the 30,155,277 Shares (approximately
                                         61.6% of the  outstanding  Shares) that
                                         NL and Tremont held directly;

                                (3)      Valhi,  VGI,   National,   NOA,   Dixie
                                         Holding,    Dixie   Rice,    Southwest,
                                         Contran,  the CMRT  and the  Foundation
                                         may have be  deemed  to share the power
                                         to vote or direct  the  disposition  of
                                         the  45,527,072  Shares  (approximately
                                         93.0% of the  outstanding  Shares) that
                                         NL,  Valhi and Tremont  held  directly;
                                         and

                                (4)      Harold  C.  Simmons  may  be  deemed to
                                         share the  power to vote or direct  the
                                         disposition  of the  45,561,609  Shares
                                         (approximately 93.1% of the outstanding
                                         Shares) that NL, Valhi, Tremont and his
                                         spouse held directly.

                       (iii)    Sole power to dispose or direct the disposition
                                of:

                                See the response to Item 4(c)(i) of this
                                statement.

                       (iv)     Shared power to dispose or to direct the
                                disposition of:

                                See the  response  to Item  4(c)(ii) of this
                                statement.

Item 5.       Ownership of Five Percent or Less of a Class.

              Not applicable.

Item 6.       Ownership of More than Five Percent on Behalf of Another Person.

              Not applicable.

Item 7.       Identification  and  Classification  of the  Subsidiary  Which
              Acquired the  Security  Being Reported on By the Parent Holding
              Company or Control Person.

              See Schedule B attached hereto and incorporated herein by
              reference.

Item 8.       Identification and Classification of Members of the Group.

              Not applicable.

Item 9.       Notice of Dissolution of Group.

              Not applicable.

Item 10.      Certification.

              Not applicable.

                                    Signature

     After  reasonable  inquiry and to the best of my  knowledge  and belief,  I
certify that the information  set forth in this statement is true,  complete and
correct.

Date:  March 31, 2004




                                /s/ Harold C. Simmons
                                --------------------------------
                                Harold C. Simmons
                                Signing in the capacities listed on Schedule "A"
                                attached hereto and incorporated herein by
                                reference.

                                    Signature

     After  reasonable  inquiry and to the best of my  knowledge  and belief,  I
certify that the information  set forth in this Statement is true,  complete and
correct.

Date:  March 31, 2004





                                /s/ Steven L. Watson
                                --------------------------------
                                Steven L. Watson
                                Signing in the capacities listed on Schedule "A"
                                attached hereto and incorporated herein by
                                reference.

                                    Signature

     After  reasonable  inquiry and to the best of my  knowledge  and belief,  I
certify that the information  set forth in this Statement is true,  complete and
correct.

Date:  March 31, 2004





                                /s/ Robert D. Graham
                                --------------------------------
                                Robert D. Graham
                                Signing in the capacity listed on Schedule "A"
                                attached hereto and incorporated herein by
                                reference.

                                   SCHEDULE A


HAROLD C. SIMMONS, in his individual capacity, and as trustee of THE COMBINED
MASTER RETIREMENT TRUST.


STEVEN L. WATSON, as president or vice president of each of:

CONTRAN CORPORATION
DIXIE HOLDING COMPANY
DIXIE RICE AGRICULTURAL CORPORATION, INC.
HAROLD SIMMONS FOUNDATION, INC.
NATIONAL CITY LINES, INC.
NOA, INC.
SOUTHWEST LOUISIANA LAND COMPANY, INC.
TREMONT LLC
VALHI GROUP, INC.
VALHI, INC.


ROBERT D. GRAHAM, as vice president of each of NL INDUSTRIES, INC.

                                   SCHEDULE B


     The  following  information  is  presented  as of December  31,  2003.  All
capitalized  terms in this Schedule B have the same meanings given such terms in
the statement to which this Schedule B is a part.

               NL,  Valhi and  Tremont  were the direct  holders  of  25,047,507
          Shares  (51.2%),   15,371,595  Shares  (31.4%)  and  5,107,770  Shares
          (10.4%),  respectively, of the outstanding Shares. Together, NL, Valhi
          and Tremont may be deemed to control  the  Company.  Valhi and Tremont
          were  the   direct   holders   of   approximately   63.1%  and  21.4%,
          respectively,  of the outstanding NL common stock. Together, Valhi and
          Tremont  may be deemed to control NL.  Valhi was the direct  holder of
          100% of the membership interests of Tremont.  VGI, National,  Contran,
          the Foundation,  the Contran  Deferred  Compensation  Trust No. 2 (the
          "CDCT No.  2") and the CMRT were the direct  holders  of 77.6%,  9.1%,
          3.1%,  0.9%, 0.4% and 0.1%,  respectively,  of the outstanding  common
          stock of Valhi.  Together,  VGI, National and Contran may be deemed to
          control Valhi. National, NOA and Dixie Holding were the direct holders
          of  approximately  73.3%,  11.4%  and  15.3%,  respectively,   of  the
          outstanding  common stock of VGI.  Together,  National,  NOA and Dixie
          Holding may be deemed to control VGI.  Contran and NOA were the direct
          holders  of  approximately  85.7%  and  14.3%,  respectively,  of  the
          outstanding  common  stock of National  and  together may be deemed to
          control  National.  Contran and Southwest  were the direct  holders of
          approximately 49.9% and 50.1%, respectively, of the outstanding common
          stock of NOA and together may be deemed to control NOA. Dixie Rice was
          the direct  holder of 100% of the  outstanding  common  stock of Dixie
          Holding and may be deemed to control  Dixie  Holding.  Contran was the
          holder of 100% of the  outstanding  common stock of Dixie Rice and may
          be  deemed  to  control   Dixie  Rice.   Contran  was  the  holder  of
          approximately  88.9% of the outstanding  common stock of Southwest and
          may be deemed to control Southwest.

               Substantially all of Contran's  outstanding voting stock was held
          by  trusts  established  for  the  benefit  of  certain  children  and
          grandchildren  of  Harold  C.  Simmons  (the  "Trusts"),  of which Mr.
          Simmons was the sole  trustee.  As sole trustee of each of the Trusts,
          Mr.  Simmons has the power to vote and direct the  disposition  of the
          shares of  Contran  stock  held by each of the  Trusts.  Mr.  Simmons,
          however, disclaims beneficial ownership of any shares of Contran stock
          that the Trusts held.

               The   Foundation   directly  held   approximately   0.9%  of  the
          outstanding  shares  of  Valhi  common  stock.  The  Foundation  is  a
          tax-exempt  foundation  organized for charitable  purposes.  Harold C.
          Simmons  is the  chairman  of the board of the  Foundation  and may be
          deemed to control the Foundation.

               The  CDCT  No.  2  directly  held   approximately   0.4%  of  the
          outstanding Valhi common stock. U.S. Bank National  Association serves
          as the trustee of the CDCT No. 2. Contran  established  the CDCT No. 2
          as an irrevocable  "rabbi trust" to assist Contran in meeting  certain
          deferred  compensation  obligations that it owes to Harold C. Simmons.
          If the CDCT No. 2 assets are insufficient to satisfy such obligations,
          Contran is  obligated  to satisfy the balance of such  obligations  as
          they come due.  Pursuant to the terms of the CDCT  No. 2,  Contran (i)
          retains  the  power to vote the  shares  of Valhi  common  stock  held
          directly by the CDCT No. 2, (ii) retains  dispositive  power over such
          shares and (iii) may be deemed the indirect  beneficial  owner of such
          shares.

               The CMRT  directly  held  approximately  0.1% of the  outstanding
          shares of Valhi common stock. Valhi established the CMRT as a trust to
          permit the  collective  investment  by master trusts that maintain the
          assets of certain employee  benefit plans Valhi and related  companies
          adopt. Mr. Simmons is the sole trustee of the CMRT and a member of the
          trust investment  committee for the CMRT. Mr. Simmons is a participant
          in one or more of the employee  benefit plans that invest  through the
          CMRT.

               Valmont Insurance Company ("Valmont"),  NL and a subsidiary of NL
          directly  owned  1,000,000  shares,  3,522,967  shares  and  1,186,200
          shares,  respectively,  of Valhi  common  stock.  Valhi was the direct
          holder of 100% of the  outstanding  common stock of Valmont and may be
          deemed to control Valmont.  Pursuant to Delaware law, Valhi treats the
          shares of Valhi common stock that Valmont, NL and the subsidiary of NL
          own as  treasury  stock for voting  purposes  and for the  purposes of
          percentage calculations such shares are not deemed outstanding.

               Harold  C.  Simmons  is the  chairman  of  the  board  and  chief
          executive  officer of each of the Company  and NL and the  chairman of
          the  board  of each of  Tremont,  Valhi,  VGI,  National,  NOA,  Dixie
          Holding, Dixie Rice, Southwest and Contran.

               By virtue of the holding of the offices,  the stock ownership and
          his services as trustee, all as described above, (a) Harold C. Simmons
          may be deemed to control such entities and (b) Mr. Simmons and certain
          of  such  entities  may  be  deemed  to  possess  indirect  beneficial
          ownership of Shares  directly held by certain of such other  entities.
          However, Mr. Simmons disclaims such beneficial ownership of the Shares
          beneficially  owned  directly or indirectly  by any of such  entities,
          except to the extent of his vested  beneficial  interest,  if any,  in
          Shares held by the CMRT and his interest as a beneficiary  of the CDCT
          No. 2. Mr. Harold Simmons disclaims beneficial ownership of all Shares
          that NL, Valhi or Tremont directly hold.

               Harold C.  Simmons'  spouse was the direct owner of 34,737 Shares
          and 69,475  shares of NL common  stock.  Mr.  Simmons may be deemed to
          share  indirect  beneficial  ownership  of such  shares.  Mr.  Simmons
          disclaims all such beneficial ownership.

               Harold C. Simmons directly held 3,000 Shares, 12,000 shares of NL
          common stock  (including  stock options  exercisable for 6,000 shares)
          and 3,383 shares of Valhi common stock.