UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 1)*

                                Kirby Corporation
                                (Name of Issuer)

                                  Common Stock
                         (Title of Class of Securities)

                                    497266106
                                 (CUSIP Number)

                                December 31, 2004
             (Date of Event Which Requires Filing of this Statement)

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

                             [X]    Rule 13d-1(b)
                             [ ]    Rule 13d-1(c)
                             [ ]    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 the
disclosures provided in a prior cover page.

The information required in 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).

                               Page 1 of 12 pages



CUSIP No. 497266106                    13G                    Page 2 of 12 Pages

--------------------------------------------------------------------------------
1       NAME OF REPORTING PERSON /
        I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                Artisan Partners Limited Partnership
--------------------------------------------------------------------------------
2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
        (see Instructions)                                               (a) [ ]

                Not Applicable                                           (b) [ ]
--------------------------------------------------------------------------------
3       SEC USE ONLY

--------------------------------------------------------------------------------
4       CITIZENSHIP OR PLACE OF ORGANIZATION

                Delaware
--------------------------------------------------------------------------------
                        5       SOLE VOTING POWER
     NUMBER OF
                                        None
      SHARES        ------------------------------------------------------------
                        6       SHARED VOTING POWER
   BENEFICIALLY
                                        1,169,640
     OWNED BY       ------------------------------------------------------------
                        7       SOLE DISPOSITIVE POWER
       EACH
                                        None
     REPORTING      ------------------------------------------------------------
                        8       SHARED DISPOSITIVE POWER
    PERSON WITH
                                        1,169,640
--------------------------------------------------------------------------------
9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                1,169,640
--------------------------------------------------------------------------------
10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
        (see Instructions)

                Not Applicable
--------------------------------------------------------------------------------
11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                4.7%
--------------------------------------------------------------------------------
12      TYPE OF REPORTING PERSON
        (see Instructions)

                IA
--------------------------------------------------------------------------------

                                  Page 2 of 12



CUSIP No. 497266106                    13G                    Page 3 of 12 Pages

--------------------------------------------------------------------------------
1       NAME OF REPORTING PERSON
        S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                Artisan Investment Corporation
--------------------------------------------------------------------------------
2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
        (see Instructions)                                               (a) [ ]

                Not Applicable                                           (b) [ ]
--------------------------------------------------------------------------------
3       SEC USE ONLY

--------------------------------------------------------------------------------
4       CITIZENSHIP OR PLACE OF ORGANIZATION

                Wisconsin
--------------------------------------------------------------------------------
                        5       SOLE VOTING POWER
     NUMBER OF
                                        None
      SHARES        ------------------------------------------------------------
                        6       SHARED VOTING POWER
   BENEFICIALLY
                                        1,169,640
     OWNED BY       ------------------------------------------------------------
                        7       SOLE DISPOSITIVE POWER
       EACH
                                        None
     REPORTING      ------------------------------------------------------------
                        8       SHARED DISPOSITIVE POWER
    PERSON WITH
                                        1,169,640
--------------------------------------------------------------------------------
9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                1,169,640
--------------------------------------------------------------------------------
10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
        (see Instructions)

                Not Applicable
--------------------------------------------------------------------------------
11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                4.7%
--------------------------------------------------------------------------------
12      TYPE OF REPORTING PERSON
        (see Instructions)

                CO
--------------------------------------------------------------------------------

                                  Page 3 of 12



CUSIP No. 497266106                    13G                    Page 4 of 12 Pages

--------------------------------------------------------------------------------
1       NAME OF REPORTING PERSON
        S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                Andrew A. Ziegler
--------------------------------------------------------------------------------
2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
        (see Instructions)                                               (a) [ ]

                Not Applicable                                           (b) [ ]
--------------------------------------------------------------------------------
3       SEC USE ONLY

--------------------------------------------------------------------------------
4       CITIZENSHIP OR PLACE OF ORGANIZATION

                U.S.A
--------------------------------------------------------------------------------
                        5       SOLE VOTING POWER
     NUMBER OF
                                        None
      SHARES        ------------------------------------------------------------
                        6       SHARED VOTING POWER
   BENEFICIALLY
                                        1,169,640
     OWNED BY       ------------------------------------------------------------
                        7       SOLE DISPOSITIVE POWER
       EACH
                                        None
     REPORTING      ------------------------------------------------------------
                        8       SHARED DISPOSITIVE POWER
    PERSON WITH
                                        1,169,640
--------------------------------------------------------------------------------
9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                1,169,640
--------------------------------------------------------------------------------
10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
        (see Instructions)

                Not Applicable
--------------------------------------------------------------------------------
11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                4.7%
--------------------------------------------------------------------------------
12      TYPE OF REPORTING PERSON
        (see Instructions)

                IN
--------------------------------------------------------------------------------

                                  Page 4 of 12



CUSIP No. 497266106                    13G                    Page 5 of 12 Pages

-------------------------------------------------------------------------------
1       NAME OF REPORTING PERSON
        S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                Carlene Murphy Ziegler
--------------------------------------------------------------------------------
2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
        (see Instructions)                                               (a) [ ]

                Not Applicable                                           (b) [ ]
--------------------------------------------------------------------------------
3       SEC USE ONLY

--------------------------------------------------------------------------------
4       CITIZENSHIP OR PLACE OF ORGANIZATION

                U.S.A
--------------------------------------------------------------------------------
                        5       SOLE VOTING POWER
     NUMBER OF
                                        None
      SHARES        ------------------------------------------------------------
                        6       SHARED VOTING POWER
   BENEFICIALLY
                                        1,169,640
     OWNED BY       ------------------------------------------------------------
                        7       SOLE DISPOSITIVE POWER
       EACH
                                        None
     REPORTING      ------------------------------------------------------------
                        8       SHARED DISPOSITIVE POWER
    PERSON WITH
                                        1,169,640
--------------------------------------------------------------------------------
9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                1,169,640
--------------------------------------------------------------------------------
10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
        (see Instructions)

                Not Applicable
--------------------------------------------------------------------------------
11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                4.7%
--------------------------------------------------------------------------------
12      TYPE OF REPORTING PERSON
        (see Instructions)

                IN
--------------------------------------------------------------------------------

                                  Page 5 of 12



Item 1(a)       Name of Issuer:

                        Kirby Corporation

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

                        55 Waugh Drive, Suite 1000
                        Houston, TX 77007

Item 2(a)       Name of Person Filing:

                        Artisan Partners Limited Partnership ("Artisan
                        Partners")
                        Artisan Investment Corporation, the general partner of
                        Artisan Partners ("Artisan Corp.")
                        Andrew A. Ziegler
                        Carlene Murphy Ziegler

Item 2(b)       Address of Principal Business Office:

                        Artisan Partners, Artisan Corp., Mr. Ziegler and Ms.
                        Ziegler are all located at:

                        875 East Wisconsin Avenue, Suite 800
                        Milwaukee, WI 53202

Item 2(c)       Citizenship:

                        Artisan Partners is a Delaware limited partnership
                        Artisan Corp. is a Wisconsin corporation
                        Mr. Ziegler and Ms. Ziegler are U.S. citizens

Item 2(d)       Title of Class of Securities:

                        Common Stock

Item 2(e)       CUSIP Number:

                        497266106

Item 3          Type of Person:

                        (e) Artisan Partners is an investment adviser registered
                        under section 203 of the Investment Advisers Act of
                        1940; Artisan Corp. is the General Partner of Artisan
                        Partners; Mr. Ziegler and Ms. Ziegler are the principal
                        stockholders of Artisan Corp.

                                  Page 6 of 12



Item 4          Ownership (at December 31, 2004):

                        (a)     Amount owned "beneficially" within the meaning
                                of rule 13d-3:

                                1,169,640

                        (b)     Percent of class:

                                4.7% (based on 24,807,000 shares outstanding as
                                of November 8, 2004)

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

                                (i)     sole power to vote or to direct the
                                        vote: None
                                (ii)    shared power to vote or to direct the
                                        vote: 1,169,640
                                (iii)   sole power to dispose or to direct the
                                        disposition of: None
                                (iv)    shared power to dispose or to direct
                                        disposition of: 1,169,640

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

                        If this statement is being filed to report the fact that
                        as of the date hereof the reporting person has ceased to
                        be the beneficial owner of more than five percent of the
                        class of securities, check the following [X].

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:

                        Not Applicable

Item 8          Identification and Classification of Members of the Group:

                        Not Applicable

Item 9          Notice of Dissolution of Group:

                        Not Applicable

Item 10         Certification:

                        By signing below I certify that, to the best of my
                        knowledge and belief, the securities referred to above
                        were acquired and are held in the ordinary course of
                        business and were not acquired and are not held for the
                        purpose of or with the effect of changing or influencing
                        the control of the issuer of the securities and were not
                        acquired and are not held in connection with or as a
                        participant in any transaction having that purpose or
                        effect.

                                  Page 7 of 12



                                    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:  January 26, 2005

                                    ARTISAN INVESTMENT CORPORATION
                                    for itself and as general partner of
                                    ARTISAN PARTNERS LIMITED PARTNERSHIP

                                    By: Lawrence A. Totsky*
                                        ----------------------------------------

                                    ANDREW A. ZIEGLER

                                    Andrew A. Ziegler*
                                    --------------------------------------------

                                    CARLENE MURPHY ZIEGLER

                                    Carlene Murphy Ziegler*
                                    --------------------------------------------

                                   *By: /s/ Lawrence A. Totsky
                                        ----------------------------------------
                                        Lawrence A. Totsky
                                        Chief Financial Officer of Artisan
                                        Investment Corporation
                                        Attorney-in-Fact for Andrew A. Ziegler
                                        Attorney-in-Fact for Carlene Murphy
                                        Ziegler

                                  Page 8 of 12



                                  Exhibit Index

Exhibit 1       Joint Filing Agreement dated as of January 26, 2005 by and
                among Artisan Partners Limited Partnership, Artisan Investment
                Corporation, Andrew A. Ziegler, and Carlene Murphy Ziegler

Exhibit 2       Power of Attorney of Andrew A. Ziegler dated as of April 2, 2002

Exhibit 3       Power of Attorney of Carlene M. Ziegler dated as of April 2,
                2002

                                  Page 9 of 12



                                                                       EXHIBIT 1

                             JOINT FILING AGREEMENT

        The undersigned hereby agree to the joint filing of the Schedule 13G to
which this Agreement is attached.

Dated: January 26, 2005

                                    ARTISAN INVESTMENT CORPORATION
                                    for itself and as general partner of
                                    ARTISAN PARTNERS LIMITED PARTNERSHIP

                                    By: Lawrence A. Totsky*
                                        ----------------------------------------

                                    ANDREW A. ZIEGLER

                                    Andrew A. Ziegler*
                                    --------------------------------------------

                                    CARLENE MURPHY ZIEGLER

                                    Carlene Murphy Ziegler*
                                    --------------------------------------------

                                   *By: /S/ Lawrence A. Totsky
                                        ----------------------------------------
                                        Lawrence A. Totsky
                                        Chief Financial Officer of Artisan
                                        Investment Corporation
                                        Attorney-in-Fact for Andrew A. Ziegler
                                        Attorney-in-Fact for Carlene Murphy
                                        Ziegler

                                  Page 10 of 12



                                                                       EXHIBIT 2

                                POWER OF ATTORNEY

        The undersigned, Andrew A. Ziegler, hereby appoints Lawrence A. Totsky,
Janet D. Olsen, and Gregory K. Ramirez, and each of them individually, his true
and lawful attorney-in-fact and agent, with full power to execute and file with
the United States Securities and Exchange Commission and any stock exchange or
similar authority, for and on his behalf in any and all capacities, any and all
reports required to be filed pursuant to Section 13 of the Securities Exchange
Act of 1934 and the rules thereunder, including but not limited to reports on
Schedule 13D or 13G, any and all amendments to such reports, with all exhibits,
and any other forms or documents as may be necessary in connection with the
filing of such reports with the United States Securities and Exchange Commission
and any stock exchange or similar authority, granting unto said attorney full
power and authority to do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to complete, as fully as the
undersigned might or could do in person.

        This Power of Attorney shall remain in full force and effect until
revoked by the undersigned in a signed writing delivered to the foregoing
attorneys-in-fact and agents.

        IN WITNESS WHEREOF the undersigned has caused this Power of Attorney to
be executed this 2nd day of April, 2002.

                                                   /s/ Andrew A. Ziegler
                                                   -----------------------------
                                                   Andrew A. Ziegler

STATE OF WISCONSIN )
                   ) SS.
COUNTY OF MILWAUKEE)

        I, Marie V. Glowacki, a Notary Public in and for the County of
Milwaukee, State of Wisconsin, DO HEREBY CERTIFY that Andrew A. Ziegler, who is
personally known to me to be the same person whose name is subscribed to the
foregoing instrument, appeared before me this day in person and acknowledged
that he signed and delivered the said instrument as his own free and voluntary
act, for the uses and purposes therein set forth.

        Given under my hand and notarial seal, this 2 day of April, 2002.

                                                   /s/ Marie V. Glowacki
                                                   -----------------------------
                                                   Notary Public

                                  Page 11 of 12



                                                                       EXHIBIT 3

                                POWER OF ATTORNEY

        The undersigned, Carlene Murphy Ziegler, hereby appoints Lawrence A.
Totsky, Janet D. Olsen, and Gregory K. Ramirez, and each of them individually,
her true and lawful attorney-in-fact and agent, with full power to execute and
file with the United States Securities and Exchange Commission and any stock
exchange or similar authority, for and on her behalf in any and all capacities,
any and all reports required to be filed pursuant to Section 13 of the
Securities Exchange Act of 1934 and the rules thereunder, including but not
limited to reports on Schedule 13D or 13G, any and all amendments to such
reports, with all exhibits, and any other forms or documents as may be necessary
in connection with the filing of such reports with the United States Securities
and Exchange Commission and any stock exchange or similar authority, granting
unto said attorney full power and authority to do and perform any and all acts
for and on behalf of the undersigned which may be necessary or desirable to
complete, as fully as the undersigned might or could do in person.

        This Power of Attorney shall remain in full force and effect until
revoked by the undersigned in a signed writing delivered to the foregoing
attorneys-in-fact and agents.

        IN WITNESS WHEREOF the undersigned has caused this Power of Attorney to
be executed this 2 day of April, 2002.

                                                   /s/ Carlene Murphy Ziegler
                                                   -----------------------------
                                                   Carlene Murphy Ziegler

STATE OF WISCONSIN )
                   ) SS.
COUNTY OF MILWAUKEE)

        I, Kim R. Ruffert, a Notary Public in and for the County of Milwaukee,
State of Wisconsin, DO HEREBY CERTIFY that Carlene Murphy Ziegler, who is
personally known to me to be the same person whose name is subscribed to the
foregoing instrument, appeared before me this day in person and acknowledged
that she signed and delivered the said instrument as her own free and voluntary
act, for the uses and purposes therein set forth.

        Given under my hand and notarial seal, this 2 day of April, 2002.

                                                   /s/ Kim R. Ruffert
                                                   -----------------------------
                                                   Notary Public

                                  Page 12 of 12