BIOANALYTICAL SYSTEMS INC
SC 13G, 1998-02-12
LABORATORY APPARATUS & FURNITURE
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UNITED  STATES
SECURITIES  AND  EXCHANGE  COMMISSION
Washington,  D.C.    20549


SCHEDULE  13G

Under  the  Securities  Exchange  Act  of  1934


Bioanalytical  Systems,  Inc.
(Name  of  Issuer)


Common  Shares
(Title  or  Class  of  Securities)


09058M  10  3
(CUSIP  Number)




<PAGE>
CUSIP  No.  09058M  10  3

1.   NAME  OF  REPORTING  PERSON
     I.R.S.  IDENTIFICATION  NO.  OF  ABOVE  PERSON  (Entities  Only)

     Middlewest  Ventures  II,  L.P.
	 35-1780267

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

NUMBER  OF  SHARES  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON  WITH
<TABLE>

<CAPTION>



<S>                          <C>
5. SOLE VOTING POWER. . . .        0
6. SHARED VOTING POWER. . .  282,152
7. SOLE DISPOSITIVE POWER .        0
8. SHARED DISPOSITIVE POWER  282,152
</TABLE>


9.  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING
    PERSON

    282,152

10. CHECK  BOX  IF  THE  AGGREGATE  AMOUNT  IN  ROW  (9)  EXCLUDES
    CERTAIN  SHARES


11. PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  9

    6.35%

12. TYPE  OF  REPORTING  PERSON

    PN

<PAGE>
CUSIP  No.  09058M  10  3

1.  NAME  OF  REPORTING  PERSON
    I.R.S.  IDENTIFICATION  NO.  OF  ABOVE  PERSON  (Entities  Only)

    Middlewest  Management  Company,  L.P.
	35-1741139

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

NUMBER  OF  SHARES  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON  WITH
<TABLE>

<CAPTION>



<S>                          <C>
5. SOLE VOTING POWER. . . .        0
6. SHARED VOTING POWER. . .  282,152
7. SOLE DISPOSITIVE POWER .        0
8. SHARED DISPOSITIVE POWER  282,152
</TABLE>


9.  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING
    PERSON

    282,152

10. CHECK  BOX  IF  THE  AGGREGATE  AMOUNT  IN  ROW  (9)  EXCLUDES
    CERTAIN  SHARES


11. PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  9

    6.35%

12. TYPE  OF  REPORTING  PERSON

    PN


<PAGE>
CUSIP  No.  09058M  10  3

1.  NAME  OF  REPORTING  PERSON
    I.R.S.  IDENTIFICATION  NO.  OF  ABOVE  PERSON  (Entities  Only)

    Thomas  A.  Hiatt

2.  CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP

    (a)
    (b)    [X]

3.  SEC  USE  ONLY

4.  CITIZENSHIP  OR  PLACE  OF  ORGANIZATION

    U.S.A.

NUMBER  OF  SHARES  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON  WITH
<TABLE>

<CAPTION>



<S>                          <C>
5. SOLE VOTING POWER. . . .        0
6. SHARED VOTING POWER. . .  282,152
7. SOLE DISPOSITIVE POWER .        0
8. SHARED DISPOSITIVE POWER  282,152
</TABLE>


9.  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING
    PERSON

    282,152

10. CHECK  BOX  IF  THE  AGGREGATE  AMOUNT  IN  ROW  (9)  EXCLUDES
    CERTAIN  SHARES


11. PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  9

    6.35%

12. TYPE  OF  REPORTING  PERSON

    IN

<PAGE>
CUSIP  No.  09058M  10  3

1.  NAME  OF  REPORTING  PERSON
    I.R.S.  IDENTIFICATION  NO.  OF  ABOVE  PERSON  (Entities  Only)

    Marcy  Shockey

2.  CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP

    (a)
    (b)    [X]

3.  SEC  USE  ONLY

4.  CITIZENSHIP  OR  PLACE  OF  ORGANIZATION

    U.S.A.

NUMBER  OF  SHARES  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON  WITH
<TABLE>

<CAPTION>



<S>                          <C>
5. SOLE VOTING POWER. . . .        0
6. SHARED VOTING POWER. . .  282,152
7. SOLE DISPOSITIVE POWER .        0
8. SHARED DISPOSITIVE POWER  282,152
</TABLE>


9.  AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING
    PERSON

    282,152

10. CHECK  BOX  IF  THE  AGGREGATE  AMOUNT  IN  ROW  (9)  EXCLUDES
    CERTAIN  SHARES


11. PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  9

    6.35%

12. TYPE  OF  REPORTING  PERSON

    IN

<PAGE>
SCHEDULE  13G

ITEM  1.

This statement relates to the Common Shares of Bioanalytical Systems, Inc., an
Indiana  corporation  ("BAS"),  with  principal executive offices at 2701 Kent
Avenue,  West  Lafayette,  Indiana  47906.

ITEM  2.

(A)  - (C) The persons filing this statement are Middlewest Ventures II, L.P.,
Middlewest  Management  Company,  L.P.,  Thomas  A.  Hiatt,  and Marcy Shockey
(collectively,  the  "Reporting  Persons,"  and  individually,  a  "Reporting
Person").  Middlewest Ventures II, L.P. ("Middlewest Ventures") and Middlewest
Management  Company,  L.P.  ("Middlewest Management") are limited partnerships
organized under Delaware law.  Middlewest Management is the general partner of
Middlewest  Ventures.    Mr.  Hiatt  and  Ms.  Shockey, each of whom is a U.S.
citizen,  are  the  general  partners  of  Middlewest  Management.

Middlewest  Ventures  and  Middlewest  Management have certain individuals and
entities  as limited partners.  The limited partners have the right to receive
dividends  from,  and  proceeds  from  the  sale  of,  the  BAS shares held by
Middlewest  Ventures,  as  determined from time to time by Thomas A. Hiatt and
Marcy  Shockey,  the  general  partners  of Middlewest Management, the general
partner  of  Middlewest  Ventures.  The limited partners do not have voting or
investment  power  with  respect  to  the  shares held by Middlewest Ventures.

The principal business office of all Reporting Persons is located at 201 North
Illinois  Street,  Suite  300,  Indianapolis,  Indiana  46204.

(D) AND (E)  This statement relates to the Common Shares of BAS, and the CUSIP
number  for  such  securities  is  09058M  10  3.

ITEM  3.

Not  Applicable.

ITEM  4.          OWNERSHIP

(A)  -  (C)  The  following  table  sets forth, as of the close of business on
December 31, 1997, the aggregate number of BAS Common Shares and percentage of
BAS  Common  Shares  beneficially  owned  by  each  Reporting  Person.

<PAGE>
<TABLE>

<CAPTION>



<S>                                  <C>                <C>
Person. . . . . . . . . . . . . . .  Number of Shares   Percent of Class
Middlewest Ventures II, L.P.. . . .       282,152  (1)              6.35%
Middlewest Management Company, L.P.       282,152  (2)              6.35%
Thomas A. Hiatt . . . . . . . . . .       282,152  (3)              6.35%
Marcy Shockey . . . . . . . . . . .       282,152  (4)              6.35%
<FN>

(1)  Middlewest  Ventures shares voting and investment power with respect to
all  of  the shares indicated with Middlewest Management, its general partner,
and with Thomas A. Hiatt and Marcy Shockey, the general partners of Middlewest
Management.

(2)  Includes  the  shares held by Middlewest Ventures and described in Note(1),
as  to  which voting and investment power is shared as described in Note(1).

(3)  Includes  the  shares held by Middlewest Ventures and described in Note(1),
as  to  which voting and investment power is shared as described in Note(1).
Mr.  Hiatt  disclaims  beneficial  ownership  of the shares beyond his
ownership  interest  in  Middlewest  Management.

(4)  Includes  the  shares held by Middlewest Ventures and described in Note(1),
as  to  which voting and investment power is shared as described in Note(1).
Ms.  Shockey  disclaims  beneficial ownership of the shares beyond her
ownership  interest  in  Middlewest  Management.
</TABLE>


ITEMS  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.

See  the  response  to  Item  2  which  is  incorporated  herein by reference.

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  A  GROUP.

Not  Applicable.

ITEM  10. CERTIFICATION.

Not  Applicable.


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.


MIDDLEWEST  VENTURES  II,  L.P.

By:    Middlewest  Management  Company,  L.P.,  its  General  Partner


Date:    February  14,  1998
By:      \s\  Thomas  A.  Hiatt
         Thomas  A.  Hiatt,  General  Partner



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.


MIDDLEWEST  MANAGEMENT  COMPANY,  L.P.



Date:    February  14,  1998
By:      \s\  Thomas  A.  Hiatt
         Thomas  A.  Hiatt,  General  Partner



<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:    February  14,  1998
         \s\  Thomas  A.  Hiatt
         Thomas  A.  Hiatt


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:    February  14,  1998
         \s\  Marcy  Shockey
         Marcy  Shockey








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