DIANON SYSTEMS INC
SC 13D/A, 1997-04-09
MEDICAL LABORATORIES
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<PAGE>
 
                     SECURITIES AND EXCHANGE COMMISSION
                           Washington, D.C. 20549

                                Schedule 13D

                  Under the Securities Exchange Act of 1934

                              (Amendment No. 1)

                            Dianon Systems, Inc.
                            --------------------
                              (Name of Issuer)


                                Common Stock
                                ------------
                       (Title of Class of Securities)


                                    25282610
                                    --------
                                 (CUSIP Number)

                                Michael Jacobson
                               Cooley Godward LLP
                             Five Palo Alto Square
                              3000 El Camino Real
                              Palo Alto, CA  94306
                                 (415) 843-5000
                                 --------------
                 (Name, Address and Telephone Number of Person
               Authorized to Receive Notices and Communications)


                               December 27, 1997
                               -----------------
                      (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 which is the subject of this Schedule 13D, and is filing
this schedule because of Rule 13d-1(b)(3) or (4), check the following box  [_].

     NOTE:  Six copies of this statement, including all exhibits, should be
filed with the Commission.  See Rule 13d-1(a) 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).

CUSIP NO. 25282610
                         (Continued on following pages)
                             (Page 1 of 32 Pages)
<PAGE>
 
                                 SCHEDULE 13D
 
- -----------------------                                 ----------------------
  CUSIP No. 25282610                                     PAGE 2  OF 32 PAGES
- -----------------------                                 ----------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                  
      JMB/FEB Partners

- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                                     (a) [_]
                                                                       (b) [X]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      SOURCE OF FUNDS*
 4    
      WC

- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(d) OR 2(e)
 5                                                                         [_] 

- ------------------------------------------------------------------------------
     
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
      Colorado

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7   
     NUMBER OF            62,389
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8
                          0
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9    
    REPORTING             62,389        
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10
                          0    
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 11 
      62,389                 

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 12                                                                        [_]
 
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 13   
      [0.93%]

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
 14
      PN

- ------------------------------------------------------------------------------
<PAGE>
 
                                 SCHEDULE 13D
 
- -----------------------                                 ----------------------
  CUSIP No. 25282610                                     PAGE 3  OF 32 PAGES
- -----------------------                                 ----------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                  
      J. M. Bryan Family Trust

- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                                     (a) [_]
                                                                       (b) [X]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      SOURCE OF FUNDS*
 4    
      WC

- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(d) OR 2(e)
 5                                                                         [_] 

- ------------------------------------------------------------------------------
     
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
      California

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7   
     NUMBER OF            96,895
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8
                          0
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9    
    REPORTING             96,895        
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10
                          0    
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 11 
      96,895                 

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 12                                                                        [_]
 
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 13   
      [1.44%]

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
 14
      OO

- ------------------------------------------------------------------------------
<PAGE>
 
                                 SCHEDULE 13D
 
- -----------------------                                 ----------------------
  CUSIP No. 25282610                                     PAGE 4  OF 32 PAGES
- -----------------------                                 ----------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                  
      KBH Partners     

- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                                     (a) [_]
                                                                       (b) [X]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      SOURCE OF FUNDS*
 4    
      WC

- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(d) OR 2(e)
 5                                                                         [_] 

- ------------------------------------------------------------------------------
     
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
      Colorado

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7   
     NUMBER OF            31,756
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8
                          0
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9    
    REPORTING             31,756        
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10
                          0    
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 11 
      31,756                 

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 12                                                                        [_]
 
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 13   
      [0.47%]

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
 14
      PN

- ------------------------------------------------------------------------------
<PAGE>
 
                                 SCHEDULE 13D
 
- -----------------------                                 ----------------------
  CUSIP No. 25282610                                     PAGE 5  OF 32 PAGES
- -----------------------                                 ----------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                  
      SEB Partners     

- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                                     (a) [_]
                                                                       (b) [X]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      SOURCE OF FUNDS*
 4    
      WC

- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(d) OR 2(e)
 5                                                                         [_] 

- ------------------------------------------------------------------------------
     
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
      Colorado

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7   
     NUMBER OF            33,894
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8
                          0
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9    
    REPORTING             33,894        
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10
                          0    
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 11 
      33,894                 

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 12                                                                        [_]
 
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 13   
      [0.51%]

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
 14
      PN

- ------------------------------------------------------------------------------
<PAGE>
 
                                 SCHEDULE 13D
 
- -----------------------                                 ----------------------
  CUSIP No. 25282610                                     PAGE 6  OF 32 PAGES
- -----------------------                                 ----------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                  
      AAB Partners     

- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                                     (a) [_]
                                                                       (b) [X]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      SOURCE OF FUNDS*
 4    
      WC

- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(d) OR 2(e)
 5                                                                         [_] 

- ------------------------------------------------------------------------------
     
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
      Colorado

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7   
     NUMBER OF            13,581
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8
                          0
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9    
    REPORTING             13,581        
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10
                          0    
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 11 
      13,581                 

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 12                                                                        [_]
 
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 13   
      [0.20%]

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
 14
      PN

- ------------------------------------------------------------------------------
<PAGE>
 
                                 SCHEDULE 13D
 
- -----------------------                                 ----------------------
  CUSIP No. 25282610                                     PAGE 7  OF 32 PAGES
- -----------------------                                 ----------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                  
      ALB Partners      

- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                                     (a) [_]
                                                                       (b) [X]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      SOURCE OF FUNDS*
 4    
      WC

- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(d) OR 2(e)
 5                                                                         [_] 

- ------------------------------------------------------------------------------
     
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
      Colorado

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7   
     NUMBER OF            13,581
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8
                          0
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9    
    REPORTING             13,581        
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10
                          0    
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 11 
      13,581                 

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 12                                                                        [_]
 
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 13   
      [0.20%]

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
 14
      PN

- ------------------------------------------------------------------------------
<PAGE>
 
                                 SCHEDULE 13D
 
- -----------------------                                 ----------------------
  CUSIP No. 25282610                                     PAGE 8  OF 32 PAGES
- -----------------------                                 ----------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                  
      Bryco Investments

- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                                     (a) [_]
                                                                       (b) [X]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      SOURCE OF FUNDS*
 4    
      WC

- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(d) OR 2(e)
 5                                                                         [_] 

- ------------------------------------------------------------------------------
     
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
      California

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7   
     NUMBER OF            0      
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8
                          0
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9    
    REPORTING             0             
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10
                          0    
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 11 
      0                      

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 12                                                                        [_]
 
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 13   
      [0%]    

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
 14
      PN

- ------------------------------------------------------------------------------
<PAGE>
 
                                 SCHEDULE 13D
 
- -----------------------                                 ----------------------
  CUSIP No. 25282610                                     PAGE 9  OF 32 PAGES
- -----------------------                                 ----------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                  
      Edward E. Eyre Trust B-1

- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                                     (a) [_]
                                                                       (b) [X]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      SOURCE OF FUNDS*
 4    
      WC

- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(d) OR 2(e)
 5                                                                         [_] 

- ------------------------------------------------------------------------------
     
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
      California

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7   
     NUMBER OF            17,500
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8
                          0
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9    
    REPORTING             17,500        
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10
                          0    
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 11 
      17,500                 

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 12                                                                        [_]
 
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 13   
      [0.26%]

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
 14
      OO

- ------------------------------------------------------------------------------
<PAGE>
 
                                 SCHEDULE 13D
 
- -----------------------                                 ----------------------
  CUSIP No. 25282610                                     PAGE 10 OF 32 PAGES
- -----------------------                                 ----------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                  
      Edward E. Eyre Trust B-2

- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                                     (a) [_]
                                                                       (b) [X]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      SOURCE OF FUNDS*
 4    
      WC

- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(d) OR 2(e)
 5                                                                         [_] 

- ------------------------------------------------------------------------------
     
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
      California

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7   
     NUMBER OF            17,500
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8
                          0
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9    
    REPORTING             17,500        
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10
                          0    
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 11 
      17,500

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 12                                                                        [_]
 
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 13   
      [0.26%]

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
 14
      OO

- ------------------------------------------------------------------------------
<PAGE>
 
                                 SCHEDULE 13D
 
- -----------------------                                 ----------------------
  CUSIP No. 25282610                                     PAGE 11 OF 32 PAGES
- -----------------------                                 ----------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                  
      Jupiter Partners

- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                                     (a) [_]
                                                                       (b) [X]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      SOURCE OF FUNDS*
 4    
      WC

- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(d) OR 2(e)
 5                                                                         [_] 

- ------------------------------------------------------------------------------
     
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
      California

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7   
     NUMBER OF            69,316
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8
                          0
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9    
    REPORTING             69,316        
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10
                          0    
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 11 
      69,316

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 12                                                                        [_]
 
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 13   
      [1.03%]

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
 14
      PN

- ------------------------------------------------------------------------------
<PAGE>
 
                                 SCHEDULE 13D
 
- -----------------------                                 ----------------------
  CUSIP No. 25282610                                     PAGE 12 OF 32 PAGES
- -----------------------                                 ----------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                  
      John M. Bryan

- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                                     (a) [_]
                                                                       (b) [X]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      SOURCE OF FUNDS*
 4    
      WC

- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
      ITEMS 2(d) OR 2(e)
 5                                                                         [_] 

- ------------------------------------------------------------------------------
     
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
      United States

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7   
     NUMBER OF            356,412
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8
                          0
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9    
    REPORTING             356,412       
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10
                          0    
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 11 
      356,412

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
 12                                                                        [_]
 
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
 13   
      [5.31%]

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
 14
      IN

- ------------------------------------------------------------------------------
<PAGE>
 
ITEM 1:  SECURITY AND ISSUER
- ----------------------------

1.   Class of Securities:  Common Stock

2.   Issuer:  Dianon Systems Inc. ("Issuer")
 
3.   Principal Address:  200 Watson Boulevard, Stratford, CT  06497
 
ITEM 2:  IDENTITY AND BACKGROUND
- --------------------------------
 
1    (a)  Reporting Person:      JMB/FEB Partners ("JMB/FEB")
                                 ---------------------------- 

     (b)  Business Address:      600 Montgomery Street, 35th Floor
                                 San Francisco, CA  94111
 
     (c)  Principal Business:    Family investment partnership

     (d)  Criminal Convictions:  None

     (e)  Civil Adjudication of Violation of Securities Laws:  None

     (f)  Citizenship or Place of Organization:  Colorado
 
          *   *   *   *   *
 
2    (a)  Reporting Person:      J. M. Bryan Family Trust ("JMB Family Trust")
                                 ---------------------------------------------
 
     (b)  Business Address:      600 Montgomery Street, 35th Floor
                                 San Francisco, CA  94111
 
     (c)  Principal Business:    Family trust holding investments

     (d)  Criminal Convictions:  None

     (e)  Civil Adjudication of Violation of Securities Laws:  None

     (f)  Citizenship or Place of Organization:  California
 
          *   *   *   *   *
 
3    (a)  Reporting Person:      KBH Partners ("KBH")
                                 --------------------
 
     (b)  Business Address:      600 Montgomery Street, 35th Floor
                                 San Francisco, CA  94111
 

                              Page 13 of 32 Pages
<PAGE>
 
     (c)  Principal Business:    Family investment partnership

     (d)  Criminal Convictions:  None

     (e)  Civil Adjudication of Violation of Securities Laws:  None

     (f)  Citizenship or Place of Organization:  Colorado
 
          *   *   *   *   *
 
4    (a)  Reporting Person:      SEB Partners ("SEB")
                                 --------------------
 
     (b)  Business Address:      600 Montgomery Street, 35th Floor
                                 San Francisco, CA  94111
 
     (c)  Principal Business:    Family investment partnership

     (d)  Criminal Convictions:  None

     (e)  Civil Adjudication of Violation of Securities Laws:  None

     (f)  Citizenship or Place of Organization:  Colorado
 
          *   *   *   *   *
 
5    (a)  Reporting Person:      AAB Partners ("AAB")
                                 --------------------
 
     (b)  Business Address:      600 Montgomery Street, 35th Floor
                                 San Francisco, CA  94111
 
     (c)  Principal Business:    Family investment partnership

     (d)  Criminal Convictions:  None

     (e)  Civil Adjudication of Violation of Securities Laws:  None

     (f)  Citizenship or Place of Organization:  Colorado

          *   *   *   *   *
 
6    (a)  Reporting Person:    ALB Partners ("ALB")
                               --------------------
 
     (b)  Business Address:    600 Montgomery Street, 35th Floor
                               San Francisco, CA  94111
 

                              Page 14 of 32 Pages
<PAGE>
 
     (c)  Principal Business:  Family investment partnership

     (d)  Criminal Convictions:  None

     (e)  Civil Adjudication of Violation of Securities Laws:  None

     (f)  Citizenship or Place of Organization:  Colorado
 
          *   *   *   *   *

7    (a)  Reporting Person:      Bryco Investments ("Bryco")
                                 ---------------------------
 
     (b)  Business Address:      600 Montgomery Street, 35th Floor
                                 San Francisco, CA  94111
 
     (c)  Principal Business:    Venture capital fund

     (d)  Criminal Convictions:  None

     (e)  Civil Adjudication of Violation of Securities Laws:  None

     (f)  Citizenship or Place of Organization:  California
 
          *   *   *   *   *
 
8    (a)  Reporting Person:      Edward E. Eyre Trust B-1 ("Eyre Trust B-1")
                                 -------------------------------------------
 
     (b)  Business Address:      600 Montgomery Street, 35th Floor
                                 San Francisco, CA  94111
 
     (c)  Principal Business:    Family trust holding investments

     (d)  Criminal Convictions:  None

     (e)  Civil Adjudication of Violation of Securities Laws:  None

     (f)  Citizenship or Place of Organization:  California
 
          *   *   *   *   *
 
9    (a)  Reporting Person:    Edward E. Eyre Trust B-2 ("Eyre Trust B-2")
                               -------------------------------------------
 
     (b)  Business Address:    600 Montgomery Street, 35th Floor
                               San Francisco, CA  94111
 

                              Page 15 of 32 Pages
<PAGE>
 
     (c)  Principal Business:  Family trust holding investments

     (d)  Criminal Convictions:  None

     (e)  Civil Adjudication of Violation of Securities Laws:  None

     (f)  Citizenship or Place of Organization:  California

          *   *   *   *   *
 
10   (a)  Reporting Person:      Jupiter Partners ("Jupiter")
                                 ----------------------------
 
     (b)  Business Address:      600 Montgomery Street, 35th Floor
                                 San Francisco, CA  94111
 
     (c)  Principal Business:    Venture capital fund

     (d)  Criminal Convictions:  None

     (e)  Civil Adjudication of Violation of Securities Laws:  None

     (f)  Citizenship or Place of Organization:  California
 
          *   *   *   *   *
 
11   (a)  Reporting Person:    John M. Bryan
                               -------------
 
     (b)  Business Address:    600 Montgomery Street, 35th Floor
                               San Francisco, CA  94111

     (c)  Principal Business:  Mr. Bryan is a general partner of JMB/FEB, KBH,
                               SEB, AAB, ALB, Bryco and Jupiter. Mr. Bryan is a
                               trustee of JMB Family Trust, Eyre Trust, B-1 and
                               Eyre Trust B-2.

     (d)  Criminal Convictions:  None

     (e)  Civil Adjudication of Violation of Securities Laws:  None

     (f)  Citizenship or Place of Organization:  United States

          *   *   *   *   *

THE FOLLOWING ITEMS 3 THROUGH 6 ARE PROVIDED AS TO ALL REPORTING PERSONS SET
FORTH ABOVE.

                              Page 16 of 32 Pages
<PAGE>
 
          *   *   *   *   *

ITEM 3:  SOURCE AND AMOUNT OF FUNDS
- -----------------------------------

I.   The shares of the Common Stock of the Issuer reported as beneficially owned
by JMB/FEB, the JMB Family Trust, KBH, SEB, AAB, and ALB in Item 5 have been
purchased with working capital by Bryco Investments ("Bryco"). Prior to
September 1995, Bryco Investments ("Bryco") acquired securities for
$363,286.50 which today repesent to 112,096 shares of the Common Stock of the
Issuer. On September 1, 1995, Bryco acquired 10,000 shares of Common Stock of
the Issuer for $55,000. On September 11, 1995, Bryco acquired 130,000 shares
of Common Stock of the Issuer for $715,000.

     Prior to September 1995, Bryco had made the following distributions to its
various partners:

     A.   JMB/FEB.  13,639 shares of Common Stock of the Issuer were contributed
          -------                                                               
to JMB/FEB.

     B.   JMB Family Trust.  13,107 shares of Common Stock of the Issuer were
          ----------------                                                   
contributed to the JMB Family Trust.

     C.   KBH.  1,671 shares of Common Stock of the Issuer were contributed to
          ---                                                                 
KBH.

     D.   SEB.  1,671 shares of Common Stock of the Issuer were contributed to
          ---                                                                 
SEB.

     E.   AAB.  1,671 shares of Common Stock of the Issuer were contributed to
          ---                                                                 
AAB.

     F.   ALB.  1,671 shares of Common Stock of the Issuer were contributed to
          ---                                                                 
ALB.

     After these distributions and prior to the purchases of September 1, 1995
and September 11, 1995, Bryco held an aggregate of 78,666 shares of the Common
Stock of the Issuer.  The subsequent purchases of 10,000 shares of the Common
Stock of the Issuer on September 1, 1995 and of 130,000 shares of the Common
Stock of the Issuer on September 11, 1995 increased Bryco's aggregate holding of
the Common Stock of the Issuer to 218,666 shares.

     On December 27, 1996, Bryco distributed all remaining 218,666 shares of the
Common Stock of the Issuer which it held as follows:

     A.  JMB/FEB.  48,750 shares of the Common Stock of the Issuer were
         -------                                                       
distributed to JMB/FEB.

     B.  JMB Family Trust.  83,788 shares of the Common Stock of the Issuer were
         ----------------                                                       
distributed to the JMB Family Trust.

     C.  KBH.  30,085 shares of the Common Stock of the Issuer were distributed
         ---                                                                   
to KBH.

     D.  SEB.  32,223 shares of the Common Stock of the Issuer were distributed
         ---                                                                   
to SEB.

                              Page 17 of 32 Pages
<PAGE>
 
     E. AAB.  11,910 shares of the Common Stock of the Issuer were distributed
        ---                                                                   
to AAB.

     F.  ALB.  11,910 shares of the Common Stock of the Issuer were distributed
         ---                                                                   
to ALB.

     As a result of the distributions, Bryco holds no remaining shares of the
Common Stock of the Issuer as of April 9, 1997.  Following the Bryco
distributions, JMB/FEB, the JMB Family Trust, KBH, SEB, AAB, and ALB hold the
following amounts of the Common Stock of the Issuer:

     A.   JMB/FEB.  62,389 shares.

     B.   JMB Family Trust.  96,895 shares.

     C.   KBH.  31,756 shares.

     D.   SEB.  33,894 shares.

     E.   AAB.  13,581 shares.

     F.   ALB.  13,581 shares.

II.  The shares of the Common Stock of the Issuer reported as beneficially owned
by Eyre Trust B-1 and Eyre Trust B-2 in Item 5 were purchased with working
capital by the Edward E. Eyre Trust B (the "Eyre Trust").  Prior to 1995, the
Eyre Trust acquired securities for $156,520.50 which today, in the aggregate,
consist of 35,000 shares of the Common Stock of the Issuer.

     On April 22, 1996 the Eyre Trust was divided into two trusts:  the Eyre
Trust B-1 and the Eyre Trust B-2.  As a result of the division, the 35,000
shares of the Common Stock of the Issuer held by the Eyre Trust were divided
equally between the Eyre Trust B-1 and the Eyre Trust B-2.  Accordingly, as a
result of the division, the Eyre Trust B-1 and the Eyre Trust B-2 each hold
17,500 shares of the Common Stock of the Issuer.

III. The shares of the Common Stock of the Issuer reported as beneficially owned
by Jupiter in Item 5 were purchased with working capital.  On May 29, 1986,
Jupiter acquired securities for $199,950 which today consist of 69,316 shares of
the Common Stock of the Issuer.


ITEM 4:  PURPOSE OF TRANSACTION
- -------------------------------

     The purpose of the December 27, 1996 distributions by Bryco of 218,666
shares of the Common Stock of the Issuer was to distribute marketable securities
to provide liquidity for its partners.

     The purpose of the purchase by Bryco of 10,000 shares of the Issuer's
Common Stock on September 1, 1995 and 130,000 shares of the Issuer's Common
Stock on September 11, 1995, as well as the purpose of all other purchases of
the Issuer's capital stock by JMB/FEB, JMB Family Trust,

                              Page 18 of 32 Pages
<PAGE>
 
KBH, SEB, AAB, ALB, Eyre Trust B-1, Eyre Trust B-2 and Jupiter, was investment.
As a result of such purchases, however, these combined entities have acquired a
significant percentage of the Common Stock of the Issuer and as stockholders,
they will collectively have a voice in the formulation of the Issuer's policy
and business strategy.  Mr. John Bryan is a general partner of JMB/FEB, KBH,
SEB, AAB, ALB, Bryco and Jupiter, and is the trustee of JMB Family Trust, Eyre
Trust B-1 and Eyre Trust B-2.  JMB/FEB, JMB Family Trust, KBH, SEB, AAB, ALB,
Eyre Trust B-1, Eyre Trust B-2 and Jupiter (as well as Bryco) may make
additional purchases of Common Stock of the Issuer, may sell some or all of the
shares of Common Stock they currently own, or may distribute some or all of such
stock to their respective partners, depending on their evaluation of the
Issuer's business prospects and financial position, the market for such stock,
general business and stock market conditions and other factors.

     None of the Reporting Persons set forth in Item 2 hereof has any plan or
proposal relating to, or which would result in, any event described in (a)-(j)
of the instructions to this Item 4.

ITEM 5:  INTEREST IN SECURITIES OF ISSUER
- -----------------------------------------
 
1    REPORTING ENTITIES:
     -------------------
 
     JMB/FEB Partners
     ----------------
 
     (a)      Beneficial Ownership:       62,389
 
     (b)      Percentage Ownership:         0.93%
 
              Sole Voting Power:          62,389
 
              Shared Voting Power:             0
 
              Sole Dispositive Power:     62,389
 
              Shared Dispositive Power:        0

     (c)      Recent Transactions:  See Item 3 above.

     (d)      Not Applicable.

     (e)      Ownership below 5%:  Not Applicable.

                              Page 19 of 32 Pages
<PAGE>
 
     J. M. Bryan Family Trust
     ------------------------
 
     (a)      Beneficial Ownership:       96,895
 
     (b)      Percentage Ownership:         1.44%
 
              Sole Voting Power:          96,895
 
              Shared Voting Power:             0
 
              Sole Dispositive Power:     96,895
 
              Shared Dispositive Power:        0

     (c)      Recent Transactions:  See Item 3 above.
 
     (d)      Not Applicable.

     (e)      Ownership below 5%:  Not Applicable.

     KBH Partners
     ------------

     (a)      Beneficial Ownership:       31,756
 
     (b)      Percentage Ownership:         0.47%
 
              Sole Voting Power:          31,756
 
              Shared Voting Power:             0
 
              Sole Dispositive Power:     31,756
 
              Shared Dispositive Power:        0

     (c)      Recent Transactions:  See Item 3 above.

     (d)      Not Applicable.

     (e)      Ownership below 5%:  Not Applicable.

                              Page 20 of 32 Pages
<PAGE>
 
     SEB Partners
     ------------

     (a)      Beneficial Ownership:       33,894
 
     (b)      Percentage Ownership:         0.51%
 
              Sole Voting Power:          33,894
 
              Shared Voting Power:             0
 
              Sole Dispositive Power:     33,894
 
              Shared Dispositive Power:        0

     (c)      Recent Transactions:  See Item 3 above.

     (d)      Not Applicable.

     (e)      Ownership below 5%:  Not Applicable.

     AAB Partners
     ------------

     (a)      Beneficial Ownership:       13,581
 
     (b)      Percentage Ownership:         0.20%
 
              Sole Voting Power:          13,581
 
              Shared Voting Power:             0
 
              Sole Dispositive Power:     13,581
 
              Shared Dispositive Power:        0

     (c)      Recent Transactions:  See Item 3 above.

     (d)      Not Applicable.

     (e)      Ownership below 5%:  Not Applicable.

                              Page 21 of 32 Pages
<PAGE>
 
     ALB Partners
     ------------

     (a)      Beneficial Ownership:       13,581
 
     (b)      Percentage Ownership:         0.20%
 
              Sole Voting Power:          13,581
 
              Shared Voting Power:             0
 
              Sole Dispositive Power:     13,581
 
              Shared Dispositive Power:        0

     (c)      Recent Transactions:  See Item 3 above.
 
     (d)      Not Applicable.

     (e)      Ownership below 5%:  Not Applicable.

     Bryco Investments
     -----------------
 
     (a)      Beneficial Ownership:       0
 
     (b)      Percentage Ownership:       0
 
              Sole Voting Power:          0
 
              Shared Voting Power:        0
 
              Sole Dispositive Power:     0
 
              Shared Dispositive Power:   0

     (c)      Recent Transactions:  See Item 3 above.
 
     (d)      Not Applicable.

     (e)      Ownership below 5%:  Not Applicable.

                              Page 22 of 32 Pages
<PAGE>
 
     Edward E. Eyre Trust B-1
     ------------------------
 
     (a)      Beneficial Ownership:       17,500
 
     (b)      Percentage Ownership:         0.26%
 
              Sole Voting Power:          17,500
 
              Shared Voting Power:             0
 
              Sole Dispositive Power:     17,500
 
              Shared Dispositive Power:        0

     (c)      Recent Transactions:  See Item 3 above.

     (d)      Not Applicable.

     (e)      Ownership below 5%:  Not Applicable.

     Edward E. Eyre Trust B-2
     ------------------------

     (a)      Beneficial Ownership:       17,500
 
     (b)      Percentage Ownership:         0.26%
 
              Sole Voting Power:          17,500
 
              Shared Voting Power:             0
 
              Sole Dispositive Power:     17,500
 
              Shared Dispositive Power:        0

     (c)      Recent Transactions:  See Item 3 above.

     (d)      Not Applicable.

     (e)      Ownership below 5%:  Not Applicable.

                              Page 23 of 32 Pages
<PAGE>
 
     Jupiter Partners
     ----------------
 
     (a)      Beneficial Ownership:       69,316
 
     (b)      Percentage Ownership:         1.03%
 
              Sole Voting Power:          69,316
 
              Shared Voting Power:             0
 
              Sole Dispositive Power:     69,316
 
              Shared Dispositive Power:        0

     (c)      Recent Transactions:  See Item 3 above.

     (d)      Not Applicable.

     (e)      Ownership below 5%:  Not Applicable.
 
2    REPORTING INDIVIDUAL:
     ---------------------
 
     John M. Bryan
     -------------
 
     (a)      Beneficial Ownership:       356,412
              
     (b)      Percentage Ownership:          5.31%
              
              Sole Voting Power:          356,412
              
              Shared Voting Power:              0
              
              Sole Dispositive Power:     356,412
              
              Shared Dispositive Power:         0

     (c)      Recent Transactions:  See Item 3 above.

     (d)      Not Applicable.

     (e)      Ownership below 5%:  Not Applicable.

                              Page 24 of 32 Pages
<PAGE>
 
ITEM 6:  CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT
- ------------------------------------------------------------------------------
TO SECURITIES OF THE ISSUER
- ---------------------------

     Mr. John M. Bryan is the General Partner or Trustee of each entity named in
response to Item 2 above.  With this exception, to the best knowledge of the
undersigned, there are no contracts, arrangements, understandings or
relationships (legal or otherwise) among the persons named in Item 2 and between
such persons and any person with respect to any securities of the Issuer,
including but not limited to transfer or voting of any of the securities,
finder's fees, joint ventures, loan or option agreements, puts or calls,
guarantees of profits, division of profits or loss, or the giving or withholding
of proxies.

ITEM 7:  EXHIBITS
- -----------------

Exhibit A:  Joint Filing Statement

                              Page 25 of 32 Pages
<PAGE>
 
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:  April 9, 1997


JMB/FEB PARTNERS

By Its General Partner John M. Bryan



By:  /s/ Alan R. Brudos
     ______________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, General Partner



J. M. BRYAN FAMILY TRUST

By Its Trustee John M. Bryan



By:  /s/ Alan R. Brudos
     ______________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, Trustee

KBH PARTNERS

By Its General Partner John M. Bryan



By:  /s/ Alan R. Brudos
     ______________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, General Partner

                              Page 26 of 32 Pages
<PAGE>
 
SEB PARTNERS

By Its General Partner John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, General Partner



AAB PARTNERS

By Its General Partner John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, General Partner



ALB PARTNERS

By Its General Partner John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, General Partner



BRYCO INVESTMENTS

By Its General Partner John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, General Partner

                              Page 27 of 32 Pages
<PAGE>
 
EDWARD E. EYRE TRUST B-1

By Its Trustee John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, Trustee



EDWARD E. EYRE TRUST B-2

By Its Trustee John M. Bryan


By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, Trustee



JUPITER PARTNERS

By Its General Partner John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, General Partner



     /s/ Alan R. Brudos
_________________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan

                              Page 28 of 32 Pages
<PAGE>
 
                                 EXHIBIT INDEX



Exhibit
- -------

Exhibit A      Joint Filing Statement

                              Page 29 of 32 Pages
<PAGE>
 
                                   EXHIBIT A


     We, the undersigned, hereby express our agreement that the attached
Schedule 13D/A is filed on behalf of each of us.

Date:  April 9, 1997


JMB/FEB PARTNERS

By Its General Partner John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, General Partner



J. M. BRYAN FAMILY TRUST

By Its Trustee John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, Trustee



KBH PARTNERS

By Its General Partner John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, General Partner

                              Page 30 of 32 Pages
<PAGE>
 
SEB PARTNERS

By Its General Partner John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, General Partner



AAB PARTNERS

By Its General Partner John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, General Partner



ALB PARTNERS

By Its General Partner John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, General Partner



BRYCO INVESTMENTS

By Its General Partner John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, General Partner

                              Page 31 of 32 Pages
<PAGE>
 
EDWARD E. EYRE TRUST B-1

By Its Trustee John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, Trustee

EDWARD E. EYRE TRUST B-2

By Its Trustee John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, Trustee



JUPITER PARTNERS

By Its General Partner John M. Bryan



By:  /s/ Alan R. Brudos
     ____________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan, General Partner



     /s/ Alan R. Brudos
_________________________________________
     Alan R. Brudos, Attorney-In-Fact
     for John M. Bryan

                              Page 32 of 32 Pages


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