SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C.  20549


                                  SCHEDULE 13G


            INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2 
                  UNDER THE SECURITIES AND EXCHANGE ACT OF 1934
                               (Amendment No. 2 )*



                                   LANDEC CORP.  
            ------------------------------------------------------------
                                (Name of Issuer)


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


                                     514766104         
            ------------------------------------------------------------
                                  (CUSIP Number)












        -----------------
      * 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)./ /


                               (Continued on following page(s))
                                      Page 1 of 8 Pages




     CUSIP No. 514766104              13G                 Page 2 of 8 Pages
- -------------------------------------------------------------------------------
   1    NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                  The TCW Group, Inc. 
- -------------------------------------------------------------------------------

   2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                            
                                                                         (a)/ /
                                                                         (b)/x/
- -------------------------------------------------------------------------------
   3    SEC USE ONLY

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

   4    CITIZENSHIP OR PLACE OF ORGANIZATION

             Nevada corporation 
- -------------------------------------------------------------------------------
      NUMBER OF        5       SOLE VOTING POWER
        SHARES
     BENEFICIALLY                                                           -0-
       OWNED BY        --------------------------------------------------------
         EACH          6       SHARED VOTING POWER         
      REPORTING
        PERSON                                                              -0-
         WITH          --------------------------------------------------------
                       7       SOLE DISPOSITIVE POWER         

                                                                            -0-
                       --------------------------------------------------------
                       8       SHARED DISPOSITIVE POWER

                                                                            -0-
- -------------------------------------------------------------------------------
   9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                            -0-
- -------------------------------------------------------------------------------
  10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
                                                                            / /
- -------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
         0.0%(see response to Item 4)
- -------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON*
                                     HC/CO  
- -------------------------------------------------------------------------------
                  *SEE INSTRUCTIONS BEFORE FILLING OUT!





     CUSIP No. 514766104              13G                 Page 3 of 8 Pages
- -------------------------------------------------------------------------------

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

             Robert Day
- -------------------------------------------------------------------------------

   2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a)/ /
                                                                         (b)/x/
- -------------------------------------------------------------------------------

   3    SEC USE ONLY

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

   4    CITIZENSHIP OR PLACE OF ORGANIZATION

             United States Citizen
- -------------------------------------------------------------------------------

      NUMBER OF        5       SOLE VOTING POWER
       SHARES                                                               -0-
     BENEFICIALLY
      OWNED BY         6       SHARED VOTING POWER       
        EACH                                                                -0-
      REPORTING
       PERSON          7       SOLE DISPOSITIVE POWER        
        WITH                                                                -0-
                       8       SHARED DISPOSITIVE POWER
                                                                            -0-
- -------------------------------------------------------------------------------
   9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                            -0-

- -------------------------------------------------------------------------------
  10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
                               
                                                                            / /
- -------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
         0.0% (see response to Item 4)
- -------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON*7
                                         HC/IN
- -------------------------------------------------------------------------------

               *SEE INSTRUCTIONS BEFORE FILLING OUT!





                                                              Page 4 of 8 Pages
Item 1(a).  Name of Issuer:

             Landec Corp.

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

             3603 Haven Avenue
             Menlo Park, CA 94025
             
Item 2(a).   Name of Persons Filing:
Item 2(b).   Address of Principal Business Office:
Item 2(c).   Citizenship:

             The TCW Group, Inc.
             865 South Figueroa Street
             Los Angeles, CA 90017
             (Nevada Corporation)

             Robert Day 
             200 Park Avenue, Suite 2200
             New York, New York 10166
             (United States Citizen)

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

             Common Stock

Item 2(e).   CUSIP Number:

             514766104





                                                              Page 5 of 8 Pages

Item 3.      If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b),
             check whether the person filing is a:

       (a)   [ ]  Broker or Dealer registered under Section 15 of the Act:

                      Not applicable

       (b)   [ ]  Bank as defined in Section 3(a)(6) of the Act:

                      Not applicable

       (c)   [ ]  Insurance Company as defined in Section 3(a)(19) of the Act:
                  
                      Not applicable

       (d)   [ ]  Investment Company registered under Section 8 of the
                  Investment Company Act:

                      Not applicable

       (e)   [ ]  Investment Adviser registered under Section 203 of the
                  Investment Advisers Act of 1940:

                      Not applicable

       (f)   [ ]  Employee Benefit Plan, Pension Fund which is subject to the
                  provisions of the Employee Retirement Income Security Act of
                  1974 or Endowment Fund (see 13d-1(b)(1)(ii)(F)):

                      Not applicable

       (g)   [X]  Parent Holding Company, in accordance with Rule
                  13d-1(b)(ii)(G) (see Item 7):

                      The TCW Group, Inc.
                      Robert Day (individual who may be deemed to control The
                        TCW Group, Inc. and other holders of the Common Stock
                        of the issuer)

       (h)   [ ]  Group, in accordance with Rule 13d-1(b)(1)(ii)(H):

                      Not applicable.





                                                              Page 6 of 8 Pages

Item 4.      Ownership **

       THE TCW GROUP, INC.

             (a)  Amount beneficially owned: -0-

             (b)  Percent of class: 0.0%

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

                  (i)   Sole power to vote or to direct the vote:          -0-

                  (ii)  Shared power to vote or to direct the vote:   none.

                  (iii) Sole power to dispose or direct the disposition of: -0-

                  (iv)  Shared power to dispose or to direct the disposition of:
                  none.

       ROBERT DAY *** 

             (a)  Amount beneficially owned: -0-

             (b)  Percent of class: 0.0%

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

                  (i)   Sole power to vote or to direct the vote: -0-

                  (ii)  Shared power to vote or to direct the vote: none.

                  (iii) Sole power to dispose or direct the disposition of: -0-

                  (iv)  Shared power to dispose or to direct the disposition of:
                  none.

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

     ** The filing of this Schedule 13G shall not be construed as an admission 
        that the reporting person or any of its affiliates is, for the purposes
        of Section 13(d) or 13(g) of the Securities Exchange Act of 1934, the 
        beneficial owner of any securities covered by this Schedule 13G.  In 
        addition, the filing of this Schedule 13G shall not be construed as an
        admission that the reporting person or any of its affiliates is the 
        beneficial owner of any securities covered by this Schedule 13G for any
        other purposes than Section 13(d) of the Securities Exchange Act of 
        1934.
    *** Shares reported for Robert Day include shares reported for The TCW
        Group, Inc.




                                                              Page 7 of 8 Pages

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

                  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.

             SEE Exhibit A.

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

             Not applicable. SEE Exhibits A and B.

Item 9.      Notice of Dissolution of Group.

             Not applicable.

Item 10.     Certification.

       Because this statement is filed pursuant to Rule 13d-1(b), the following
       certification is included:

       By signing below I certify that, to the best of my 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.




                                                              Page 8 of 8 Pages


                                    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.


Dated this 7th day of January, 1998.


                                   The TCW Group, Inc.

                                   By: /s/  MOHAN V. PHANSALKAR
                                       -----------------------------
                                       Mohan V. Phansalkar
                                       Authorized Signatory


                                   Robert Day

                                   By: /s/  MOHAN V. PHANSALKAR
                                       -----------------------------
                                       Mohan V. Phansalkar
                                       Under Power of Attorney dated January
                                       30, 1996, on File with Schedule 13G
                                       Amendment Number 1 for Matrix Service
                                       Co. dated January 30, 1996.




                                                                   EXHIBIT 21


                                      EXHIBIT A


                   RELEVANT SUBSIDIARIES OF PARENT HOLDING COMPANY

PART A: TCW ENTITIES

PARENT HOLDING COMPANY:

          The TCW Group, Inc.

          Robert Day (an individual who may be deemed to control The TCW Group,
          Inc.)


RELEVANT SUBSIDIARIES THAT ARE PERSONS DESCRIBED IN RULE 13d-1(b):

     (i)  Trust Company of the West, a California corporation and a bank as
     defined in Section 3(a)(6) of the Securities Exchange Act of 1934. 

     (ii) TCW Asset Management Company, a California corporation and an
     Investment Adviser registered under Section 203 of the Investment Advisers
     Act of 1940. 

     (iii)     TCW Funds Management, Inc., a California corporation and an
     Investment Adviser registered under Section 203 of the Investment Advisers
     Act of 1940. 
     
Note:          No Common Stock of Landec Corp. is held directly by The TCW
               Group, Inc.  Other than the indirect holdings of The TCW Group,
               Inc. no Common Stock of Landec Corp. is held directly or
               indirectly by Robert Day, an individual who may be deemed to
               control The TCW Group, Inc. 

PART B: NON TCW ENTITIES

PARENT HOLDING COMPANY:

          Robert Day (an individual who may be deemed to control the holders
          described below which are not subsidiaries of The TCW Group, Inc.)

RELEVANT SUBSIDIARIES THAT ARE PERSONS DESCRIBED IN 
RULE 13d-1(b):

          Oakmont Corporation, a California corporation and an Investment
          Adviser registered under Section 203 of the Investment Advisers Act of
          1940.

          Cypress International Partners Limited, a British Virgin Islands
          corporation and an Investment Adviser registered under Section 203 of
          the Investment Advisers Act of 1940.


                                        A-1





                                                               EXHIBIT 99.1


                                     EXHIBIT B

                                JOINT FILING AGREEMENT

          The undersigned acknowledge and agree that the foregoing statement 
on Schedule 13G is filed on behalf of each of the undersigned and that all 
subsequent amendments to this statement on Schedule 13G shall be filed on 
behalf of each of the undersigned without the necessity of filing additional 
joint acquisition statements.  The undersigned acknowledge that each shall be 
responsible for the timely filing of such amendments, and for the 
completeness and accuracy of the information concerning him or it contained 
therein, but shall not be responsible for the completeness and accuracy of 
the information concerning the other, except to the extent that he or it 
knows or has reason to believe that such information is accurate.

Dated: January 7, 1998


                              The TCW Group, Inc.

                              By:  /s/  MOHAN V. PHANSALKAR
                                   ----------------------------
                                   Mohan V. Phansalkar
                                   Authorized Signatory


                              Robert Day

                              By: /s/  MOHAN V. PHANSALKAR
                                  ----------------------------
                                  Mohan V. Phansalkar
                                  Under Power of Attorney dated January 30,
                                  1996, on File with Schedule 13G Amendment
                                  Number 1 for Matrix Service Co. dated January
                                  30, 1996.


                                         B-1