SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G/A

                   Under the Securities Exchange Act of 1934

                               (Amendment No. A#1)


                            IDEC PHARMACEUTICALS CORP.
                   -------------------------------------------------
                                (Name of Issuer)

                                  COMMON STOCK
                   -------------------------------------------------
                         (Title of Class of Securities)

                                    449370105
                               ------------------
                                 (CUSIP Number)


Check the following box if a fee is being paid with this statement [  ].  (A 
fee is not required only if the filing person:  (1) has a previous statement 
on file reporting beneficial ownership of more than five percent of the class 
of securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7.)

*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).


                       (Continued on following pages(s))


                                  SCHEDULE 13G/A

CUSIP NO.449370105

- --------------------------------------------------------------------------------

1)   Name of Reporting Person       
     S.S. or I.R.S Identification No. of Above Person

     AMERINDO INVESTMENT ADVISORS INC., a California corporation

- --------------------------------------------------------------------------------

2)   Check the Appropriate Box                    (a)
     if a Member of a Group                     
     (See Instructions)                           (b)
                                                

- --------------------------------------------------------------------------------

3)   SEC Use Only

- --------------------------------------------------------------------------------

4)   Citizenship or Place of Organization

     California
- --------------------------------------------------------------------------------

Number of Shares    (5)  Sole Voting Power                          None
Beneficially Owned  
by Each Reporting   (6)  Shared Voting Power
Person with
                         451,500 shares in the aggregate for all Reporting
                         Persons and as to all of which beneficial ownership
                         is disclaimed
                         
                    (7)  Sole Dispositive Power                     None

                    (8)  Shared Dispositive Power

                         451,500 shares in the aggregate for all Reporting
                         Persons and as to all of which beneficial ownership
                         is disclaimed

- -------------------------------------------------------------------------------

9)   Aggregate Amount Beneficially
     Owned by Each Reporting Person

     451,500 shares in the aggregate for all Reporting Persons and as to
     all of which beneficial ownership is disclaimed

- --------------------------------------------------------------------------------

10)  Check if the Aggregate Amount                                          [X]
     in Row 9 Excludes Certain
     Shares (See Instructions)

- --------------------------------------------------------------------------------

11)  Percent of Class Represented
     by Amount in Row 9                                                   2.96%

- --------------------------------------------------------------------------------

12)  Type of Reporting Person                                                IA
     (See Instructions)

- --------------------------------------------------------------------------------


Item 1.
- ------

     (a) The Name of issuer as to whose securities this statement relates is
Idec Pharmaceuticals Corp. (the "Issuer").


     (b) The address of Issuer's principal place of business is 
11099 N Torrey Pines RD, STE 160, La Jolla, CA, 92037.


Item 2.
- ------

     (a-c) This statement is being filed by Amerindo Investment 
Advisors Inc., a California corporation whose principal executive 
offices are located at One Embarcadero Center, Suite 2300, San 
Francisco, California, 94111 ("Amerindo").  All of the subject 
securities have been purchased by Amerindo in the 
ordinary course of its business as am investment advisor and not 
with the purpose of effecting changing or influencing the control
of the issuer or in connection with or as a participant in any 
transaction having such purpose or effect, including any transaction 
subject to Rule 13d-3(b) under the Exchange Act.  Amerindo is 
registered as an investment advisor under the Investment Advisors 
Act of 1940, as amended.

     (d-e) This statement is being filed as to the Common Stock of 
Idec Pharmaceuticals Corp., Cusip Number 449370105.



Item 3.
- -------

     (a-d)     Inapplicable.

     (e)       This statement is being filed by a registered investment advisor.

     (f-h)     Inapplicable.


Item 4.  Ownership.
- ------   ---------

     (a-c)     As of June 30, 1996, Amerindo owned an aggregate of 451,500 
shares of Common Stock of the Issuer, constituting 2.96% of the class 
outstanding, determined based on the Issuers Form 10Q for the Quarter ended 
March 31, 1996 (with beneficial ownership being expressly disclaimed).


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

          Inapplicable.


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

          The subject shares are all owned by clients of Amerindo.  No such 
person's interest in the securities included in this report exceeds 5% of 
the class outstanding.


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

          Inapplicable.

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


Item 9.   Notice of Dissolution of Group.
- ------    ------------------------------

          Inapplicable.






Item 10.  Certification.  
- -------   -------------

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

                                 SIGNATURES

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


                                             AMERINDO INVESTMENT ADVISORS INC., 
                                             a California corporation


                                             By: /s/ Alberto W. Vilar
                                                 -------------------------------
                                                 ALBERTO W. VILAR, PRESIDENT


                                   EXHIBIT A

                          IDEC PHARMACEUTICALS CORP.

                                  COMMON STOCK

                                   449370105

                                        
We hereby agree that the within Statement on Schedule 13G/A regarding our 
beneficial ownership of Common Stock is filed on behalf of each of us.


                                        AMERINDO INVESTMENT ADVISORS INC.,
                                        a California corporation

                                        By:  /s/ Alberto W. Vilar
                                            ------------------------------------
                                             ALBERTO W. VILAR, PRESIDENT