WEISS PECK & GREER LLC
SC 13G, 1997-08-08
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<PAGE>
                                UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                                 SCHEDULE 13G
                   Under the Securities Exchange Act of 1934
                              (Amendment No. __)*

                         CAMBRIDGE NEUROSCIENCE INC.
      -------------------------------------------------------------------
                               (Name of Issuer)

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

                                  132426107
      -------------------------------------------------------------------
                                (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 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 5 pages


<PAGE>
CUSIP No. 132426107              13G               Page 2 of 5 Pages

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

     WEISS, PECK & GREER, L.L.C.

2.   Check the Appropriate Box if a Member of a Group         (a) / /
                                                              (b) /X/
3.   SEC Use Only

4.   Citizenship or Place of Organization

     Delaware

                         5.   Sole Voting Power

                              -0-
Number of Shares
                         6.   Shared Voting Power
 Beneficially               
                              1,930,200
 Owned by Each
                         7.   Sole Dispositive Power
Reporting Person             
                              -0-
     With     
                         8.   Shared Dispositive Power

                              1,930,200

9.   Aggregate Amount Beneficially Owned by Each Reporting Person

     1,930,200

10.  Check if the Aggregate Amount in Row 9 Excludes Certain Shares*

     XXX

11.  Percent of Class Represented by Amount in Row 9

     10.84

12.  Type of Reporting Person*

     BD, IA, PN


                    *SEE INSTRUCTIONS BEFORE FILLING OUT!

                              Page 2 of 5 pages

<PAGE>


Cusip No. 132426107                     13G                         Page 3 of 5


<TABLE>

<S>               <C>    

Item 1(a).        Name of Issuer:  Cambridge Neuroscience Inc.

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

                  One Kendall Square, Bldg. 700
                  Cambridge, MA 02139

Item 2(a).        Name of Person Filing:  Weiss, Peck & Greer, L.L.C. ("WPG")

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

                  One New York Plaza
                  New York, NY 10004

Item 2(c).        Citizenship:  WPG is a limited liability company, organized under the laws of the State of
                  Delaware

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

Item 2(e).        CUSIP Number:  132426107

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)      ( X )  Broker or Dealer  registered under Section 15 of the Securities  Exchange Act
                                  of 1934 (the "Act")
                  (b)      (   )  Bank as defined in Section 3(a)(6) of the Act
                  (c)      (   )  Insurance Company as defined in Section 3(a)(19) of the Act
                  (d)      (   )  Investment Company registered under Section 8 of the Investment Company Act
                                  of 1940
                  (e)      ( X )  Investment  Adviser  registered under Section 203 of the Investment  Advisers
                                  Act of 1940
                  (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
                                  Sec. 240.13d-1(b)(1) (ii)(F)
                  (g)      (   )  Parent Holding Company, in accordance with Sec. 240.13d-1(b)(ii)(G)
                                  (Note:  See Item 7)

                  (h)      (   )  Group, in accordance with paragraph 240.13d-1(b)(1)(ii)(H)
</TABLE>

<PAGE>


Cusip No. 132426107                     13G                         Page 4 of 5


<TABLE>

<S>               <C>    
Item 4.           Ownership:
                  ---------

                  (a)      Amount Beneficially Owned: 1,930,200 as of June 30, 1997.

                  (b)      Percent of Class:  10.84% (based on the  17,801,361  shares of common stock  reported to
                           be outstanding in the Form 10-Q filed for the period ending June 30, 1997).

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

                           (i)      sole power to vote:     -0-

                           (ii)     shared power to vote or to direct the vote: 1,930,200

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

                           (iv)     shared power to dispose or to direct the disposition of:
                                    1,930,200

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:

</TABLE>


This Statement on Schedule 13G ("Schedule 13G") is filed by WPG, a Delaware
limited liability company which is registered as a broker-dealer under Section
15 of the Act, and as an investment adviser under Section 203 of the Investment
Advisers Act of 1940, as amended.

This Schedule 13G is being filed with respect to 1,930,200 shares of common
stock of Cambridge Neuroscience Inc. (the "Common Stock") held by WPG at 
June 30, 1997 for the discretionary accounts of certain clients. By reason of
Rule 13d-3 under the Act, WPG may be deemed to be a "beneficial owner" of such
Common Stock. WPG expressly disclaims beneficial ownership of the Common
Stock. Each client has the right to receive or the power to direct the receipt
of dividends from, or the proceeds from the sale of, such Common Stock
purchased for his account. To the knowledge of WPG, no person has the right
to receive or the power to direct the receipt of dividends from, or the
proceeds from the sale of, such Common Stock which represents more than 5%
of the outstanding shares of the Common Stock referred to in Item 4(b) hereof.


This Schedule 13G is not being filed with respect to the shares of Common Stock
which may be owned by principals of WPG, or by their respective spouses, or as
custodian or trustee for their respective family members or by their respective
family foundations, since WPG does not possess or share voting or investment
power with respect to such 

<PAGE>

Cusip No. 132426107                     13G                         Page 5 of 5


Common Stock. Each of such principals disclaims, pursuant to Rule 13d-4, that he
or she is the beneficial owner, within the meaning of Rule 13d-3, of the shares
of Common Stock owned by the various parties referred to in this Schedule 13G,
other than such shares as the respective principal owns of record.

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

                  Not applicable.

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

                  Not applicable.

 Item 9.          Notice of Dissolution of the Group:

                  Not applicable.

 Item 10.         Certification:

By signing below, Richard S. Pollack, General Counsel of WPG, certifies that, to
the best of his knowledge and belief, securities referred to above as being held
or owned beneficially by WPG 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.

                                    SIGNATURE

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

Dated:  August 7, 1997

WEISS, PECK & GREER, L.L.C.

By:/s/ Richard S. Pollack
   -------------------------------
   Richard S. Pollack

   General Counsel

         Attention:  Intentional misstatements or omissions of fact constitute 
Federal criminal violations (see 18 U.S.C. 1001).



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