SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549
                  ____________________________________________

                        SCHEDULE 13D/A3 (Amendment No. 3)
                    Under the Securities Exchange Act of 1934

                               GlycoGenesys, Inc.
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                                (Name of Issuer)

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

                                    37989P10
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                                 (CUSIP Number)

                                William F. Daniel
                              Elan Corporation, plc
                                  Lincoln House
                                  Lincoln Place
                                Dublin 2, Ireland
                                (353) 1-709-4000


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           (Name, Address and Telephone Number of Person Authorized to
                      Receive Notices and Communications)


                                 March 12, 2004
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             (Date of Event which Requires Filing of this Statement)


If the filing person has previously filed a statement on Schedule 13G to report
the acquisition that is the subject of this Schedule 13D, and is filing this
schedule because of ss.ss. 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the
following box [ ].

NOTE: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Rule 240.13d-7 for other
parties to whom copies are to be sent.

*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).




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CUSIP No.  37989P10
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      (1) NAME OF REPORTING PERSONS
          Elan Corporation, plc
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only)
          N/A
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      (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See
          Instructions)
          (a) [ ]
          (b) [ ]
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      (3) SEC USE ONLY

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      (4) SOURCE OF FUNDS (See Instructions)
          WC, OO
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      (5) CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
          ITEMS 2(d) or 2(e)  [  ]
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      (6) CITIZENSHIP OR PLACE OF ORGANIZATION
          Ireland
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   Number of      (7)    SOLE VOTING POWER
     Shares              0
                  --------------------------------------------------------------
  Beneficially    (8)    SHARED VOTING POWER
     Owned               10,942,711
                  --------------------------------------------------------------
    by Each       (9)    SOLE DISPOSITIVE POWER
   Reporting             0
                  --------------------------------------------------------------
  Person With     (10)   SHARED DISPOSITIVE POWER
                         10,942,711
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      (11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
           10,942,711
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      (12) CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
           (See Instructions)  [  ]
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      (13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
           18.1%
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      (14) TYPE OF REPORTING PERSON (See Instructions)
           CO
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CUSIP No.  37989P10
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      (1) NAME OF REPORTING PERSONS Elan International Services, Ltd.
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only)
          N/A
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      (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See
          Instructions)
          (a) [ ]
          (b) [ ]
--------------------------------------------------------------------------------
      (3) SEC USE ONLY

--------------------------------------------------------------------------------
      (4) SOURCE OF FUNDS (See Instructions)
          WC, OO
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      (5) CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
          TO ITEMS 2(d) or 2(e)  [  ]
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      (6) CITIZENSHIP OR PLACE OF ORGANIZATION
          Bermuda
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   Number of      (7)    SOLE VOTING POWER
     Shares              0
                  --------------------------------------------------------------
  Beneficially    (8)    SHARED VOTING POWER
     Owned               10,942,711
                  --------------------------------------------------------------
    by Each       (9)    SOLE DISPOSITIVE POWER
   Reporting             0
                  --------------------------------------------------------------
  Person With     (10)   SHARED DISPOSITIVE POWER
                         10,942,711
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      (11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
           10,942,711
--------------------------------------------------------------------------------
      (12) CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
           (See Instructions)  [  ]
--------------------------------------------------------------------------------
      (13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
           18.1%
--------------------------------------------------------------------------------
      (14) TYPE OF REPORTING PERSON (See Instructions)
           CO
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                                  Page 3 of 5




Item 1. Security and Issuer.

     Item 1 of Schedule 13D is hereby amended and restated in its entirety as
follows:

     This Amendment No. 3 amends Schedule 13D filed with the Securities and
Exchange Commission (the "Commission") on January 22, 2004, as amended by
Schedule 13D/A1 filed with the Commission on February 3, 2004 and Schedule
13D/A2 filed with the Commission on February 20, 2004 (as so amended, the
"Schedule 13D"), by Elan Corporation, plc, an Irish public limited company
("Elan"), and its direct wholly-owned subsidiary, Elan International Services,
Ltd., a Bermuda exempted limited liability company ("EIS"), with respect to the
common stock, $0.01 par value (the "Common Stock"), of GlycoGenesys, Inc. (the
"Issuer"), a Nevada corporation whose principal offices are located at Park
Square Building, 31 St. James Avenue, 8th Floor, Boston, Massachusetts 02116.

Item 5. Interest in Securities of Issuer.

     Item 5 of Schedule 13D is hereby amended and restated in its entirety as
follows:

     (a) As of March 16, 2004, Elan (indirectly) and EIS (directly) each
beneficially own 10,942,711 shares of Common Stock, representing 18.1% of the
outstanding shares of Common Stock (based on 49,636,397 shares of Common Stock
outstanding on January 15, 2004, plus 10,793,410 shares issuable upon exercise
or conversion of the Warrants, the Series A Preferred Stock, the Series B
Preferred Stock, including 431,447 shares issuable upon conversion of accrued
but unpaid dividends on the Series B Preferred Stock as of March 16, 2004, and
the Series C Preferred Stock).

     (b) As of March 16, 2004, each of Elan and EIS has the shared voting and
dispositive power over 10,942,711 shares of Common Stock. Neither Elan nor EIS
has sole voting or dispositive power over shares of Common Stock.

     (c) On March 12, 2004, EIS sold an aggregate of 1,600,000 shares of Common
Stock in open market transactions at a price per share of $1.02.

     (d) Not applicable.

     (e) Not applicable.




                                  Page 4 of 5




                                    SIGNATURE

     After reasonable inquiry and to the best of its knowledge and belief, the
undersigned certifies that the information set forth in this statement is true,
complete and correct.

Dated:  March 16, 2004



                              ELAN CORPORATION, PLC



                              By:  /s/  William F. Daniel
                                   ---------------------------------------
                                   Name:  William F. Daniel
                                   Title: Executive Vice President
                                          and Company Secretary


Dated:  March 16, 2004



                              ELAN INTERNATIONAL SERVICES, LTD.



                              By:  /s/  Kevin Insley
                                   ---------------------------------------
                                   Name:  Kevin Insley
                                   Title: President and Chief Financial Officer



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