<PAGE>   1

                                                                     EXHIBIT 3.6





                                     BY-LAWS

                                       OF

                            COLLAGEN AESTHETICS, INC.





<PAGE>   2

                                   BY-LAWS OF

                            COLLAGEN AESTHETICS, INC.

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                      Page
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ARTICLE I CORPORATE OFFICES ............................................               1
        1.1 Registered Office ..........................................               1
        1.2 Other Offices ..............................................               1
ARTICLE II MEETINGS OF STOCKHOLDERS ....................................               1
        2.1 Place of Meetings ..........................................               1
        2.2 Annual Meeting .............................................               1
        2.3 Special Meeting ............................................               1
        2.4 Notice of Stockholders' Meetings ...........................               2
        2.5 Advance Notice of Stockholder Nominees .....................               2
        2.6 Manner of Giving Notice; Affidavit of Notice ...............               3
        2.7 Quorum .....................................................               3
        2.8 Adjourned Meeting; Notice ..................................               3
        2.9 Conduct of Business ........................................               3
        2.10 Voting ....................................................               4
        2.11 Waiver of Notice ..........................................               4
        2.12 Stockholder Action by Written Consent Without a Meeting ...               5
        2.13 Record Date For Stockholder Notice; Voting; Giving Consents               5
        2.14 Proxies ...................................................               6
        2.15 List of Stockholders Entitled to Vote .....................               6
ARTICLE III DIRECTORS ..................................................               7
        3.1 Powers .....................................................               7
        3.2 Number of Directors ........................................               7
        3.3 Election, Qualification and Term of Office of Directors ....               7
        3.4 Resignation And Vacancies ..................................               7
        3.5 Place of Meetings; Meetings by Telephone ...................               8
        3.6 Regular Meetings ...........................................               9
        3.7 Special Meetings; Notice ...................................               9
        3.8 Quorum .....................................................               9
        3.9 Waiver of Notice ...........................................               9
        3.10 Board Action by Written Consent Without a Meeting .........              10
        3.11 Fees and Compensation of Directors ........................              10
        3.12 Approval of Loans to Officers .............................              10
        3.13 Removal of Directors ......................................              10
        3.14 Chairman of the Board of Directors ........................              11
ARTICLE IV COMMITTEES ..................................................              11
        4.1 Committees of Directors ....................................              11
        4.2 Committee Minutes ..........................................              12
</TABLE>



<PAGE>   3

                                   BY-LAWS OF

                            COLLAGEN AESTHETICS, INC.

                                TABLE OF CONTENTS
                                  (continued)

<TABLE>
<CAPTION>
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                                                                                      ----
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        4.3 Meetings and Action of Committees ..........................              12
ARTICLE V OFFICERS .....................................................              12
        5.1 Officers ...................................................              12
        5.2 Appointment of Officers ....................................              12
        5.3 Subordinate Officers .......................................              13
        5.4 Removal and Resignation of Officers ........................              13
        5.5 Vacancies in Offices .......................................              13
        5.6 President ..................................................              13
        5.7 Vice Presidents ............................................              14
        5.8 Secretary ..................................................              14
        5.9 Chief Financial Officer ....................................              14
        5.10 Representation of Shares of Other Corporations ............              15
        5.11 Authority and Duties of Officers ..........................              15
ARTICLE VI INDEMNITY ...................................................              15
        6.1 Third Party Actions ........................................              15
        6.2 Actions By or in the Right of the Corporation ..............              16
        6.3 Successful Defense .........................................              16
        6.4 Determination of Conduct ...................................              16
        6.5 Payment of Expenses in Advance .............................              17
        6.6 Indemnity Not Exclusive ....................................              17
        6.7 Insurance Indemnification ..................................              17
        6.8 The Corporation ............................................              17
        6.9 Employee Benefit Plans .....................................              18
        6.10 Continuation of Indemnification and Advancement of Expenses              18
ARTICLE VII RECORDS AND REPORTS ........................................              18
        7.1 Maintenance and Inspection of Records ......................              18
        7.2 Inspection by Directors ....................................              19
        7.3 Annual Statement to Stockholders ...........................              19
</TABLE>



                                       ii
<PAGE>   4

                                   BY-LAWS OF

                            COLLAGEN AESTHETICS, INC.

                                TABLE OF CONTENTS
                                  (continued)

<TABLE>
<CAPTION>
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                                                                                    ----
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ARTICLE VIII GENERAL MATTERS ...........................................             19
        8.1 Checks .....................................................             19
        8.2 Execution of Corporate Contracts and Instruments ...........             19
        8.3 Stock Certificates; Partly Paid Shares .....................             19
        8.4 Special Designation on Certificates ........................             20
        8.5 Lost Certificates ..........................................             21
        8.6 Construction; Definitions ..................................             21
        8.7 Dividends ..................................................             21
        8.8 Fiscal Year ................................................             21
        8.9 Seal .......................................................             21
        8.10 Transfer of Stock .........................................             22
        8.11 Stock Transfer Agreements .................................             22
        8.12 Registered Stockholders ...................................             22
ARTICLE IX AMENDMENTS ..................................................             22
</TABLE>



                                      iii
<PAGE>   5

                                     BY-LAWS

                                       OF

                            COLLAGEN AESTHETICS, INC.

ARTICLE I

CORPORATE OFFICES
        1.1    Registered Office
        The registered office of the corporation shall be in the City of
Wilmington, County of New Castle, State of Delaware. The name of the registered
agent of the corporation at such location is The Corporation Trust Company.

        1.2    Other Offices
        The board of directors may at any time establish other offices at any
place or places where the corporation is qualified to do business.

ARTICLE II

MEETINGS OF STOCKHOLDERS
        2.1    Place of Meetings
        Meetings of stockholders shall be held at any place, within or outside
the State of Delaware, designated by the board of directors. In the absence of
any such designation, stockholders' meetings shall be held at the registered
office of the corporation.

        2.2    Annual Meeting
        The annual meeting of stockholders shall be held each year on a date and
at a time designated by the board of directors. At the meeting, directors shall
be elected and any other proper business may be transacted.

        2.3    Special Meeting
        A special meeting of the stockholders may be called at any time by the
board of directors, or by the chairman of the board, or by the president.

        2.4    Notice of Stockholders' Meetings
        All notices of meetings with stockholders shall be in writing and shall
be sent or otherwise given in accordance with Section 2.5 of these by-laws not
less than ten (10) nor more than sixty (60) days before the date of the meeting
to each stockholder entitled to vote at such meeting. The notice shall specify
the place, date, and hour of the meeting, and, in the case of a special meeting,
the purpose or purposes for which the meeting is called.


<PAGE>   6

        2.5    Advance Notice of Stockholder Nominees
        Only persons who are nominated in accordance with the procedures set
forth in this Section 2.5 shall be eligible for election as Directors.
Nominations of persons for election to the Board of Directors of the Corporation
may be made at a meeting of stockholders by or at the direction of the Board of
Directors or by any stockholder of the corporation entitled to vote for the
election of Directors at the meeting who complies with the notice procedures set
forth in this Section 2.5. Such nominations, other than those made by or at the
direction of the Board of Directors, shall be made pursuant to timely notice in
writing to the Secretary of the corporation. To be timely, a stockholder's
notice shall be delivered to or mailed and received at the principal executive
offices of the corporation not less than 60 days nor more than 90 days prior to
the meeting; provided, however, that in the event that less than 60 days' notice
or prior public disclosure of the date of the meeting is given or made to
stockholders, notice by the stockholder to be timely must be so received not
later than the close of business on the 10th day following the day on which such
notice of the date of the meeting was mailed or such public disclosure was made.
Such stockholder's notice shall set forth (a) as to each person whom the
stockholder proposes to nominate for election or re-election as a Director, (i)
the name, age, business address and residence address of such person, (ii) the
principal occupation or employment of such person, (iii) the class and number of
shares of the corporation which are beneficially owned by such person and (iv)
any other information relating to such person that is required to be disclosed
in solicitations of proxies for election of Directors, or is otherwise required,
in each case pursuant to Regulation 14A under the Securities Exchange Act of
1934, as amended (including without limitation such person's written consent to
being named in the proxy statement as a nominee and to serving as a Director if
elected); and (b) as to the stockholder giving the notice (i) the name and
address, as they appear on the corporation's books, of such stockholder and (ii)
the class and number of shares of the corporation which are beneficially owned
by such stockholder. At the request of the Board of Directors any person
nominated by the Board of Directors for election as a Director shall furnish to
the Secretary of the corporation that information required to be set forth in a
stockholder's notice of nomination which pertains to the nominee. No person
shall be eligible for election as a Director of the corporation unless nominated
in accordance with the procedures set forth in this Section 2.5. The Chairman of
the meeting shall, if the facts warrant, determine and declare to the meeting
that a nomination was not made in accordance with the procedures prescribed by
the By-Laws, and if he should so determine, he shall so declare to the meeting
and the defective nomination shall be disregarded.

        2.6 Manner of Giving Notice; Affidavit of Notice 
        Written notice of any meeting of stockholders, if mailed, is given when
deposited in the United States mail, postage prepaid, directed to the
stockholder at his address as it appears on the records of the corporation. An
affidavit of the secretary or an assistant secretary or of the transfer agent of
the corporation that the notice has been given shall, in the absence of fraud,
be prima facie evidence of the facts stated therein.



<PAGE>   7

        2.7    Quorum
        The holders of a majority of the stock issued and outstanding and
entitled to vote thereat, present in person or represented by proxy, shall
constitute a quorum at all meetings of the stockholders for the transaction of
business except as otherwise provided by statute or by the certificate of
incorporation. If, however, such quorum is not present or represented at any
meeting of the stockholders, then either (i) the Chairman of the meeting or (ii)
the stockholders entitled to vote thereat, present in person or represented by
proxy, shall have power to adjourn the meeting from time to time, without notice
other than announcement at the meeting, until a quorum is present or
represented. At such adjourned meeting at which a quorum is present or
represented, any business may be transacted that might have been transacted at
the meeting as originally noticed.

        2.8    Adjourned Meeting; Notice
        When a meeting is adjourned to another time or place, unless these
by-laws otherwise require, notice need not be given of the adjourned meeting if
the time and place thereof are announced at the meeting at which the adjournment
is taken. At the adjourned meeting the corporation may transact any business
that might have been transacted at the original meeting. If the adjournment is
for more than thirty (30) days, or if after the adjournment a new record date is
fixed for the adjourned meeting, a notice of the adjourned meeting shall be
given to each stockholder of record entitled to vote at the meeting.

        2.9    Conduct of Business
        The Chairman of any meeting of stockholders shall determine the order of
business and the procedure at the meeting, including such regulation of the
manner of voting and the conduct of business.

        2.10   Voting
        The stockholders entitled to vote at any meeting of stockholders shall
be determined in accordance with the provisions of Section 2.14 of these
by-laws, subject to the provisions of Sections 217 and 218 of the General
Corporation Law of Delaware (relating to voting rights of fiduciaries, pledgors
and joint owners of stock and to voting trusts and other voting agreements).

        Except as provided in the last paragraph of this Section 2.11, or as may
be otherwise provided in the certificate of incorporation, each stockholder
shall be entitled to one vote for each share of capital stock held by such
stockholder.

        At a stockholders' meeting at which directors are to be elected, each
stockholder shall be entitled to cumulate votes (i.e., cast for any candidate a
number of votes greater than the number of votes which such stockholder normally
is entitled to cast) if the candidates' names have been properly placed in
nomination (in accordance with these by-laws) prior to commencement of the
voting and the stockholder requesting cumulative



<PAGE>   8

voting has given notice prior to commencement of the voting of the stockholder's
intention to cumulate votes. If cumulative voting is properly requested, each
holder of stock, or of any class or classes or of a series or series thereof,
who elects to cumulate votes shall be entitled to as many votes as equals the
number of votes which (absent this provision as to cumulative voting) he would
be entitled to cast for the election of directors with respect to his shares of
stock multiplied by the number of directors to be elected by him, and he may
cast all of such votes for a single director or may distribute them among the
number to be voted for, or for any two or more of them, as he may see fit.

        2.11   Waiver of Notice
        Whenever notice is required to be given under any provision of the
General Corporation Law of Delaware or of the certificate of incorporation or
these by-laws, a written waiver thereof, signed by the person entitled to
notice, whether before or after the time stated therein, shall be deemed
equivalent to notice. Attendance of a person at a meeting shall constitute a
waiver of notice of such meeting, except when the person attends a meeting for
the express purpose of objecting, at the beginning of the meeting, to the
transaction of any business because the meeting is not lawfully called or
convened. Neither the business to be transacted at, nor the purpose of, any
regular or special meeting of the stockholders need be specified in any written
waiver of notice unless so required by the certificate of incorporation or these
by-laws.

        2.12   Stockholder Action by Written Consent Without a Meeting 
        Unless otherwise provided in the certificate of incorporation, any
action required by this chapter to be taken at any annual or special meeting of
stockholders of the corporation, or any action that may be taken at any annual
or special meeting of such stockholders, may be taken without a meeting, without
prior notice, and without a vote if a consent in writing, setting forth the
action so taken, is signed by the holders of outstanding stock having not less
than the minimum number of votes that would be necessary to authorize or take
such action at a meeting at which all shares entitled to vote thereon were
present and voted.

        Prompt notice of the taking of the corporate action without a meeting by
less than unanimous written consent shall be given to those stockholders who
have not consented in writing. If the action which is consented to is such as
would have required the filing of a certificate under any section of the General
Corporation Law of Delaware if such action had been voted on by stockholders at
a meeting thereof, then the certificate filed under such section shall state, in
lieu of any statement required by such section concerning any vote of
stockholders, that written notice and written consent have been given as
provided in Section 228 of the General Corporation Law of Delaware.



<PAGE>   9

        2.13 Record Date For Stockholder Notice; Voting; Giving Consents
        In order that the corporation may determine the stockholders entitled to
notice of or to vote at any meeting of stockholders or any adjournment thereof,
or entitled to express consent to corporate action in writing without a meeting,
or entitled to receive payment of any dividend or other distribution or
allotment of any rights, or entitled to exercise any rights in respect of any
change, conversion or exchange of stock or for the purpose of any other lawful
action, the board of directors may fix, in advance, a record date, which shall
not be more than sixty (60) nor less than ten (10) days before the date of such
meeting, nor more than sixty (60) days prior to any other action.

        If the board of directors does not so fix a record date:

                (i) The record date for determining stockholders entitled to
notice of or to vote at a meeting of stockholders shall be at the close of
business on the day next preceding the day on which notice is given, or, if
notice is waived, at the close of business on the day next preceding the day on
which the meeting is held.

                (ii) The record date for determining stockholders entitled to
express consent to corporate action in writing without a meeting, when no prior
action by the board of directors is necessary, shall be the day on which the
first written consent is expressed.

                (iii) The record date for determining stockholders for any other
purpose shall be at the close of business on the day on which the board of
directors adopts the resolution relating thereto.

        A determination of stockholders of record entitled to notice of or to
vote at a meeting of stockholders shall apply to any adjournment of the meeting;
provided, however, that the board of directors may fix a new record date for the
adjourned meeting.

        2.14   Proxies
        Each stockholder entitled to vote at a meeting of stockholders or to
express consent or dissent to corporate action in writing without a meeting may
authorize another person or persons to act for him by a written proxy, signed by
the stockholder and filed with the secretary of the corporation, but no such
proxy shall be voted or acted upon after three (3) years from its date, unless
the proxy provides for a longer period. A proxy shall be deemed signed if the
stockholder's name is placed on the proxy (whether by manual signature,
typewriting, telegraphic transmission or otherwise) by the stockholder or the
stockholder's attorney-in-fact. The revocability of a proxy that states on its
face that it is irrevocable shall be governed by the provisions of Section
212(c) of the General Corporation Law of Delaware.



<PAGE>   10

        2.15   List of Stockholders Entitled to Vote
        The officer who has charge of the stock ledger of a corporation shall
prepare and make, at least ten (10) days before every meeting of stockholders, a
complete list of the stockholders entitled to vote at the meeting, arranged in
alphabetical order, and showing the address of each stockholder and the number
of shares registered in the name of each stockholder. Such list shall be open to
the examination of any stockholder, for any purpose germane to the meeting,
during ordinary business hours, for a period of at least ten (10) days prior to
the meeting, either at a place within the city where the meeting is to be held,
which place shall be specified in the notice of the meeting, or, if not so
specified, at the place where the meeting is to be held. The list shall also be
produced and kept at the time and place of the meeting during the whole time
thereof, and may be inspected by any stockholder who is present. Such list shall
presumptively determine the identity of the stockholders entitled to vote at the
meeting and the number of shares held by each of them.


ARTICLE III

DIRECTORS
        3.1    Powers
        Subject to the provisions of the General Corporation Law of Delaware and
any limitations in the certificate of incorporation or these by-laws relating to
action required to be approved by the stockholders or by the outstanding shares,
the business and affairs of the corporation shall be managed and all corporate
powers shall be exercised by or under the direction of the board of directors.

        3.2    Number of Directors
        The Board of Directors shall consist of five persons until changed by a
proper amendment of this Section 3.2.

        No reduction of the authorized number of directors shall have the effect
of removing any director before that director's term of office expires.

        3.3 Election, Qualification and Term of Office of Directors 
        Except as provided in Section 3.4 of these by-laws, directors shall be
elected at each annual meeting of stockholders to hold office until the next
annual meeting. Directors need not be stockholders unless so required by the
certificate of incorporation or these by-laws, wherein other qualifications for
directors may be prescribed. Each director, including a director elected to fill
a vacancy, shall hold office until his successor is elected and qualified or
until his earlier resignation or removal.

        Elections of directors need not be by written ballot.



<PAGE>   11

        3.4    Resignation And Vacancies
        Any director may resign at any time upon written notice to the attention
of the Secretary of the corporation. When one or more directors so resigns and
the resignation is effective at a future date, a majority of the directors then
in office, including those who have so resigned, shall have power to fill such
vacancy or vacancies, the vote thereon to take effect when such resignation or
resignations shall become effective, and each director so chosen shall hold
office as provided in this section in the filling of other vacancies.

        Unless otherwise provided in the certificate of incorporation or these
by-laws:

                (i) Vacancies and newly created directorships resulting from any
increase in the authorized number of directors elected by all of the
stockholders having the right to vote as a single class may be filled by a
majority of the directors then in office, although less than a quorum, or by a
sole remaining director.

                (ii) Whenever the holders of any class or classes of stock or
series thereof are entitled to elect one or more directors by the provisions of
the certificate of incorporation, vacancies and newly created directorships of
such class or classes or series may be filled by a majority of the directors
elected by such class or classes or series thereof then in office, or by a sole
remaining director so elected.

        If at any time, by reason of death or resignation or other cause, the
corporation should have no directors in office, then any officer or any
stockholder or an executor, administrator, trustee or guardian of a stockholder,
or other fiduciary entrusted with like responsibility for the person or estate
of a stockholder, may call a special meeting of stockholders in accordance with
the provisions of the certificate of incorporation or these by-laws, or may
apply to the Court of Chancery for a decree summarily ordering an election as
provided in Section 211 of the General Corporation Law of Delaware.

        If, at the time of filling any vacancy or any newly created
directorship, the directors then in office constitute less than a majority of
the whole board (as constituted immediately prior to any such increase), then
the Court of Chancery may, upon application of any stockholder or stockholders
holding at least ten (10) percent of the total number of the shares at the time
outstanding having the right to vote for such directors, summarily order an
election to be held to fill any such vacancies or newly created directorships,
or to replace the directors chosen by the directors then in office as aforesaid,
which election shall be governed by the provisions of Section 211 of the General
Corporation Law of Delaware as far as applicable.

        3.5    Place of Meetings; Meetings by Telephone
        The board of directors of the corporation may hold meetings, both
regular and special, either within or outside the State of Delaware.



<PAGE>   12

        Unless otherwise restricted by the certificate of incorporation or these
by-laws, members of the board of directors, or any committee designated by the
board of directors, may participate in a meeting of the board of directors, or
any committee, by means of conference telephone or similar communications
equipment by means of which all persons participating in the meeting can hear
each other, and such participation in a meeting shall constitute presence in
person at the meeting.


        3.6    Regular Meetings
        Regular meetings of the board of directors may be held without notice at
such time and at such place as shall from time to time be determined by the
board.

        3.7    Special Meetings; Notice
        Special meetings of the board of directors for any purpose or purposes
may be called at any time by the chairman of the board, the president, any vice
president, the secretary or any two (2) directors.

        Notice of the time and place of special meetings shall be delivered
personally or by telephone to each director or sent by first-class mail or
telegram, charges prepaid, addressed to each director at that director's address
as it is shown on the records of the corporation. If the notice is mailed, it
shall be deposited in the United States mail at least four (4) days before the
time of the holding of the meeting. If the notice is delivered personally or by
telephone or by telegram, it shall be delivered personally or by telephone or to
the telegraph company at least forty-eight (48) hours before the time of the
holding of the meeting. Any oral notice given personally or by telephone may be
communicated either to the director or to a person at the office of the director
who the person giving the notice has reason to believe will promptly communicate
it to the director. The notice need not specify the purpose or the place of the
meeting, if the meeting is to be held at the principal executive office of the
corporation.

        3.8    Quorum
        At all meetings of the board of directors, a majority of the authorized
number of directors shall constitute a quorum for the transaction of business
and the act of a majority of the directors present at any meeting at which there
is a quorum shall be the act of the board of directors, except as may be
otherwise specifically provided by statute or by the certificate of
incorporation. If a quorum is not present at any meeting of the board of
directors, then the directors present thereat may adjourn the meeting from time
to time, without notice other than announcement at the meeting, until a quorum
is present.

        A meeting at which a quorum is initially present may continue to
transact business notwithstanding the withdrawal of directors, if any action
taken is approved by at least a majority of the required quorum for that
meeting.



<PAGE>   13

        3.9    Waiver of Notice
        Whenever notice is required to be given under any provision of the
General Corporation Law of Delaware or of the certificate of incorporation or
these by-laws, a written waiver thereof, signed by the person entitled to
notice, whether before or after the time stated therein, shall be deemed
equivalent to notice. Attendance of a person at a meeting shall constitute a
waiver of notice of such meeting, except when the person attends a meeting for
the express purpose of objecting, at the beginning of the meeting, to the
transaction of any business because the meeting is not lawfully called or
convened. Neither the business to be transacted at, nor the purpose of, any
regular or special meeting of the directors, or members of a committee of
directors, need be specified in any written waiver of notice unless so required
by the certificate of incorporation or these by-laws.

        3.10 Board Action by Written Consent Without a Meeting
        Unless otherwise restricted by the certificate of incorporation or these
by-laws, any action required or permitted to be taken at any meeting of the
board of directors, or of any committee thereof, may be taken without a meeting
if all members of the board or committee, as the case may be, consent thereto in
writing and the writing or writings are filed with the minutes of proceedings of
the board or committee.

        3.11   Fees and Compensation of Directors
        Unless otherwise restricted by the certificate of incorporation or these
by-laws, the board of directors shall have the authority to fix the compensation
of directors.

        3.12   Approval of Loans to Officers
        The corporation may lend money to, or guarantee any obligation of, or
otherwise assist any officer or other employee of the corporation or of its
subsidiary, including any officer or employee who is a director of the
corporation or its subsidiary, whenever, in the judgment of the directors, such
loan, guaranty or assistance may reasonably be expected to benefit the
corporation. The loan, guaranty or other assistance may be with or without
interest and may be unsecured, or secured in such manner as the board of
directors shall approve, including, without limitation, a pledge of shares of
stock of the corporation. Nothing in this section contained shall be deemed to
deny, limit or restrict the powers of guaranty or warranty of the corporation at
common law or under any statute.

        3.13   Removal of Directors
        Unless otherwise restricted by statute, by the certificate of
incorporation or by these by-laws, any director or the entire board of directors
may be removed, with or without cause, by the holders of a majority of the
shares then entitled to vote at an election of directors; provided, however,
that, so long as shareholders of the corporation are entitled to cumulative
voting, if less than the entire board is to be removed, no director may be
removed without cause if the votes cast against his removal would be



<PAGE>   14

sufficient to elect him if then cumulatively voted at an election of the entire
board of directors.

        No reduction of the authorized number of directors shall have the effect
of removing any director prior to the expiration of such director's term of
office.

        3.14   Chairman of the Board of Directors
        The corporation may also have, at the discretion of the board of
directors, a chairman of the board of directors who shall not be considered an
officer of the corporation.

ARTICLE IV

COMMITTEES
        4.1    Committees of Directors
        The board of directors may, by resolution passed by a majority of the
whole board, designate one or more committees, with each committee to consist of
one or more of the directors of the corporation. The board may designate one or
more directors as alternate members of any committee, who may replace any absent
or disqualified member at any meeting of the committee. In the absence or
disqualification of a member of a committee, the member or members thereof
present at any meeting and not disqualified from voting, whether or not he or
they constitute a quorum, may unanimously appoint another member of the board of
directors to act at the meeting in the place of any such absent or disqualified
member. Any such committee, to the extent provided in the resolution of the
board of directors or in the by-laws of the corporation, shall have and may
exercise all the powers and authority of the board of directors in the
management of the business and affairs of the corporation, and may authorize the
seal of the corporation to be affixed to all papers that may require it; but no
such committee shall have the power or authority to (i) amend the certificate of
incorporation (except that a committee may, to the extent authorized in the
resolution or resolutions providing for the issuance of shares of stock adopted
by the board of directors as provided in Section 151(a) of the General
Corporation Law of Delaware, fix the designations and any of the preferences or
rights of such shares relating to dividends, redemption, dissolution, any
distribution of assets of the corporation or the conversion into, or the
exchange of such shares for, shares of any other class or classes or any other
series of the same or any other class or classes of stock of the corporation or
fix the number of shares of any series of stock or authorize the increase or
decrease of the shares of any series), (ii) adopt an agreement of merger or
consolidation under Sections 251 or 252 of the General Corporation Law of
Delaware, (iii) recommend to the stockholders the sale, lease or exchange of all
or substantially all of the corporation's property and assets, (iv) recommend to
the stockholders a dissolution of the corporation or a revocation of a
dissolution, or (v) amend the bylaws of the corporation; and, unless the board
resolution establishing the committee, the by-laws or the certificate of
incorporation expressly so provide, no such committee shall have the power or



<PAGE>   15

authority to declare a dividend, to authorize the issuance of stock, or to adopt
a certificate of ownership and merger pursuant to Section 253 of the General
Corporation Law of Delaware.

        4.2    Committee Minutes
        Each committee shall keep regular minutes of its meetings and report the
same to the board of directors when required.

        4.3    Meetings and Action of Committees
        Meetings and actions of committees shall be governed by, and held and
taken in accordance with, the provisions of Article III of these by-laws,
Section 3.5 (place of meetings and meetings by telephone), Section 3.6 (regular
meetings), Section 3.7 (special meetings and notice), Section 3.8 (quorum),
Section 3.9 (waiver of notice), and Section 3.10 (action without a meeting),
with such changes in the context of those by-laws as are necessary to substitute
the committee and its members for the board of directors and its members;
provided, however, that the time of regular meetings of committees may be
determined either by resolution of the board of directors or by resolution of
the committee, that special meetings of committees may also be called by
resolution of the board of directors and that notice of special meetings of
committees shall also be given to all alternate members, who shall have the
right to attend all meetings of the committee. The board of directors may adopt
rules for the government of any committee not inconsistent with the provisions
of these by-laws.

ARTICLE V

OFFICERS

        5.1    Officers
        The officers of the corporation shall be a president, a secretary, and a
chief financial officer. The corporation may also have, at the discretion of the
board of directors, one or more vice presidents, one or more assistant
secretaries, one or more assistant treasurers, and any such other officers as
may be appointed in accordance with the provisions of Section 5.3 of these
by-laws. Any number of offices may be held by the same person.

        5.2    Appointment of Officers
        The officers of the corporation, except such officers as may be
appointed in accordance with the provisions of Sections 5.3 or 5.5 of these
by-laws, shall be appointed by the board of directors, subject to the rights, if
any, of an officer under any contract of employment.

        5.3    Subordinate Officers
        The board of directors may appoint, or empower the president to appoint,
such other officers and agents as the business of the corporation may require,
each of whom



<PAGE>   16

shall hold office for such period, have such authority, and perform such duties
as are provided in these by-laws or as the board of directors may from time to
time determine.

        5.4    Removal and Resignation of Officers
        Subject to the rights, if any, of an officer under any contract of
employment, any officer may be removed, either with or without cause, by an
affirmative vote of the majority of the board of directors at any regular or
special meeting of the board or, except in the case of an officer chosen by the
board of directors, by any officer upon whom such power of removal may be
conferred by the board of directors.

        Any officer may resign at any time by giving written notice to the
corporation. Any resignation shall take effect at the date of the receipt of
that notice or at any later time specified in that notice; and, unless otherwise
specified in that notice, the acceptance of the resignation shall not be
necessary to make it effective. Any resignation is without prejudice to the
rights, if any, of the corporation under any contract to which the officer is a
party.

        5.5    Vacancies in Offices
        Any vacancy occurring in any office of the corporation shall be filled
by the board of directors.

        5.6    President
        Subject to such supervisory powers, if any, as may be given by the board
of directors to the chairman of the board, the president shall be the chief
executive officer of the corporation and shall, subject to the control of the
board of directors, have general supervision, direction, and control of the
business and the officers of the corporation. He shall preside at all meetings
of the stockholders and, in the absence or nonexistence of a chairman of the
board, at all meetings of the board of directors. He shall have the general
powers and duties of management usually vested in the office of president of a
corporation and shall have such other powers and duties as may be prescribed by
the board of directors or these by-laws.


        5.7    Vice Presidents
        In the absence or disability of the president, the vice presidents, if
any, in order of their rank as fixed by the board of directors or, if not
ranked, a vice president designated by the board of directors, shall perform all
the duties of the president and when so acting shall have all the powers of, and
be subject to all the restrictions upon, the president. The vice presidents
shall have such other powers and perform such other duties as from time to time
may be prescribed for them respectively by the board of directors, these
by-laws, the president or the chairman of the board.



<PAGE>   17

        5.8    Secretary
        The secretary shall keep or cause to be kept, at the principal executive
office of the corporation or such other place as the board of directors may
direct, a book of minutes of all meetings and actions of directors, committees
of directors, and stockholders. The minutes shall show the time and place of
each meeting, the names of those present at directors' meetings or committee
meetings, the number of shares present or represented at stockholders' meetings,
and the proceedings thereof.

        The secretary shall keep, or cause to be kept, at the principal
executive office of the corporation or at the office of the corporation's
transfer agent or registrar, as determined by resolution of the board of
directors, a share register, or a duplicate share register, showing the names of
all stockholders and their addresses, the number and classes of shares held by
each, the number and date of certificates evidencing such shares, and the number
and date of cancellation of every certificate surrendered for cancellation.

        The secretary shall give, or cause to be given, notice of all meetings
of the stockholders and of the board of directors required to be given by law or
by these by-laws. He shall keep the seal of the corporation, if one be adopted,
in safe custody and shall have such other powers and perform such other duties
as may be prescribed by the board of directors or by these by-laws.

        5.9    Chief Financial Officer
        The chief financial officer shall keep and maintain, or cause to be kept
and maintained, adequate and correct books and records of accounts of the
properties and business transactions of the corporation, including accounts of
its assets, liabilities, receipts, disbursements, gains, losses, capital
retained earnings, and shares. The books of account shall at all reasonable
times be open to inspection by any director.

        The chief financial officer shall deposit all moneys and other valuables
in the name and to the credit of the corporation with such depositories as may
be designated by the board of directors. He shall disburse the funds of the
corporation as may be ordered by the board of directors, shall render to the
president and directors, whenever they request it, an account of all his
transactions as chief financial officer and of the financial condition of the
corporation, and shall have other powers and perform such other duties as may be
prescribed by the board of directors or the by-laws.

        5.10 Representation of Shares of Other Corporations
        The chairman of the board, the president, any vice president, the
treasurer, the secretary or assistant secretary of this corporation, or any
other person authorized by the board of directors or the president or a vice
president, is authorized to vote, represent, and exercise on behalf of this
corporation all rights incident to any and all shares of any other corporation
or corporations standing in the name of this corporation. The authority granted
herein may be exercised either by such person directly or by any other person



<PAGE>   18

authorized to do so by proxy or power of attorney duly executed by such person
having the authority.

        5.11   Authority and Duties of Officers
        In addition to the foregoing authority and duties, all officers of the
corporation shall respectively have such authority and perform such duties in
the management of the business of the corporation as may be designated from time
to time by the board of directors or the stockholders.

ARTICLE VI

INDEMNITY

        6.1    Third Party Actions
        The corporation shall indemnify any person who was or is a party or is
threatened to be made a party to any threatened, pending, or completed action,
suit or proceeding, whether civil, criminal, administrative or investigative
(other than an action by or in the right of the corporation) by reason of the
fact that he is or was a director, officer, employee or agent of the
corporation, or is or was serving at the request of the corporation as a
director, officer, employee or agent of another corporation, partnership, joint
venture trust or other enterprise, against expenses (including attorneys' fees),
judgments, fines and amounts paid in settlement actually and reasonably incurred
by him in connection with such action, suit or proceeding if he acted in good
faith and in a manner he reasonably believed to be in or not opposed to the best
interests of the corporation, and, with respect to any criminal action or
proceeding, had no reasonable cause to believe his conduct was unlawful. The
termination of any action, suit or proceeding by judgment, order, settlement,
conviction, or upon a plea of nolo contendere or its equivalent, shall not, of
itself, create a presumption that the person did not act in good faith and in a
manner which he reasonably believed to be in or not opposed to the best interest
of the corporation, and, with respect to any criminal action or proceeding, had
reasonable cause to believe that his conduct was unlawful.

        6.2 Actions By or in the Right of the Corporation
        The corporation shall indemnify any person who was or is a party or is
threatened to be made a party to any threatened, pending or completed action or
suit by or in the right of the corporation to procure a judgment in its favor by
reason of the fact that he is or was a director, officer, employee or agent of
corporation, or is or was serving at the request of the corporation as a
director, officer, employee or agent of another corporation, partnership, joint
venture, trust or other enterprise against expenses (including attorneys' fees)
actually and reasonably incurred by him in connection with the defense or
settlement of such action or suit if he acted in good faith and in a manner he
reasonably believed to be in or not opposed to the best interests of the
corporation and except that no indemnification shall be made in respect of any
claim, issue or matter as to which such person shall have been adjudged to be
liable to the corporation unless and only to the



<PAGE>   19

extent that the Delaware Court of Chancery or the court in which such action or
suit was brought shall determine upon application that, despite the adjudication
of liability but in view of all the circumstances of the case, such person is
fairly and reasonably entitled to indemnity for such expenses which the Delaware
Court of Chancery or such other court shall deem proper.

        6.3    Successful Defense
        To the extent that a director, officer, employee or agent of the
corporation has been successful on the merits or otherwise in defense of any
action, suit or proceeding referred to in Sections 6.1 and 6.2, or in defense of
any claim, issue or matter therein, he shall be indemnified against expenses
(including attorneys' fees) actually and reasonably incurred by him in
connection therewith.

        6.4    Determination of Conduct
        Any indemnification under Sections 6.1 and 6.2 (unless ordered by a
court) shall be made by the corporation only as authorized in the specific case
upon a determination that the indemnification of the director, officer, employee
or agent is proper in the circumstances because he has met the applicable
standard of conduct set forth in Sections 6.1 and 6.2. Such determination shall
be made (1) by the Board of Directors or the Executive Committee by a majority
vote of a quorum consisting of directors who were not parties to such action,
suit or proceeding or (2) or if such quorum is not obtainable or, even if
obtainable, a quorum of disinterested directors so directs, by independent legal
counsel in a written opinion, or (3) by the stockholders.

        6.5    Payment of Expenses in Advance
        Expenses incurred in defending a civil or criminal action, suit or
proceeding shall be paid by the corporation in advance of the final disposition
of such action, suit or proceeding upon receipt of an undertaking by or on
behalf of the director, officer, employee or agent to repay such amount if it
shall ultimately be determined that he is not entitled to be indemnified by the
corporation as authorized in this Article VI.

        6.6    Indemnity Not Exclusive
        The indemnification and advancement of expenses provided or granted
pursuant to the other subsections of this section shall not be deemed exclusive
of any other rights to which those seeking indemnification or advancement of
expenses may be entitled under any by-law, agreement, vote of stockholders or
disinterested directors or otherwise, both as to action in his official capacity
and as to action in another capacity while holding such office.

        6.7    Insurance Indemnification
        The corporation shall have the power to purchase and maintain insurance
on behalf of any person who is or was a director, officer, employee or agent of
the corporation, or is or was serving at the request of the corporation, as a
director, officer,



<PAGE>   20

employee or agent of another corporation, partnership, joint venture, trust or
other enterprise against any liability asserted against him and incurred by him
in any such capacity, or arising out of his status as such, whether or not the
corporation would have the power to indemnify him against such liability under
the provisions of this Article VI.

        6.8    The Corporation
        For purposes of this Article VI, references to "the corporation" shall
include, in addition to the resulting corporation, any constituent corporation
(including any constituent of a constituent) absorbed in a consolidation or
merger which, if its separate existence had continued, would have had power and
authority to indemnify its directors, officers, and employees or agents, so that
any person who is or was a director, office, employee or agent of such
constituent corporation, or is or was serving at the request of such constituent
corporation as a director, officer, employee or agent of another corporation,
partnership, joint venture, trust or other enterprise, shall stand in the same
position under and subject to the provisions of this Article VI (including,
without limitation the provisions of Section 6.4) with respect to the resulting
or surviving corporation as he would have with respect to such constituent
corporation if its separate existence had continued.


        6.9    Employee Benefit Plans
        For purposes of this Article VI, references to "other enterprises" shall
include employee benefit plans; references to "fines" shall include any excise
taxes assessed on a person with respect to an employee benefit plan; and
references to "serving at the request of the corporation" shall include any
service as a director, officer, employee or agent of the corporation which
imposes duties on, or involves services by, such director, officer, employee, or
agent with respect to an employee benefit plan, its participants, or
beneficiaries; and a person who acted in good faith and in a manner he
reasonably believed to be in the interest of the participants and beneficiaries
of an employee benefit plan shall be deemed to have acted in a manner "not
opposed to the best interests of the corporation" as referred to in this Article
VI.

        6.10 Continuation of Indemnification and Advancement of Expenses 
        The indemnification and advancement of expenses provided by, or granted
pursuant to, this Article VI shall, unless otherwise provided when authorized or
ratified, continue as to a person who has ceased to be a director, officer,
employee or agent and shall inure to the benefit of the heirs, executors and
administrators of such a person.



<PAGE>   21

ARTICLE VII

RECORDS AND REPORTS

        7.1    Maintenance and Inspection of Records
        The corporation shall, either at its principal executive offices or at
such place or places as designated by the board of directors, keep a record of
its stockholders listing their names and addresses and the number and class of
shares held by each stockholder, a copy of these by-laws as amended to date,
accounting books, and other records.

        Any stockholder of record, in person or by attorney or other agent,
shall, upon written demand under oath stating the purpose thereof, have the
right during the usual hours for business to inspect for any proper purpose the
corporation's stock ledger, a list of its stockholders, and its other books and
records and to make copies or extracts therefrom. A proper purpose shall mean a
purpose reasonably related to such person's interest as a stockholder. In every
instance where an attorney or other agent is the person who seeks the right to
inspection, the demand under oath shall be accompanied by a power of attorney or
such other writing that authorizes the attorney or other agent to so act on
behalf of the stockholder. The demand under oath shall be directed to the
corporation at its registered office in Delaware or at its principal place of
business.

        7.2    Inspection by Directors
        Any director shall have the right to examine the corporation's stock
ledger, a list of its stockholders, and its other books and records for a
purpose reasonably related to his position as a director. The Court of Chancery
is hereby vested with the exclusive jurisdiction to determine whether a director
is entitled to the inspection sought. The Court may summarily order the
corporation to permit the director to inspect any and all books and records, the
stock ledger, and the stock list and to make copies or extracts therefrom. The
Court may, in its discretion, prescribe any limitations or conditions with
reference to the inspection, or award such other and further relief as the Court
may deem just and proper.

        7.3    Annual Statement to Stockholders
        The board of directors shall present at each annual meeting, and at any
special meeting of the stockholders when called for by vote of the stockholders,
a full and clear statement of the business and condition of the corporation.



<PAGE>   22

ARTICLE VIII

GENERAL MATTERS

        8.1    Checks
        From time to time, the board of directors shall determine by resolution
which person or persons may sign or endorse all checks, drafts, other orders for
payment of money, notes or other evidences of indebtedness that are issued in
the name of or payable to the corporation, and only the persons so authorized
shall sign or endorse those instruments.

        8.2 Execution of Corporate Contracts and Instruments
        The board of directors, except as otherwise provided in these by-laws,
may authorize any officer or officers, or agent or agents, to enter into any
contract or execute any instrument in the name of and on behalf of the
corporation; such authority may be general or confined to specific instances.
Unless so authorized or ratified by the board of directors or within the agency
power of an officer, no officer, agent or employee shall have any power or
authority to bind the corporation by any contract or engagement or to pledge its
credit or to render it liable for any purpose or for any amount.

        8.3 Stock Certificates; Partly Paid Shares
        The shares of a corporation shall be represented by certificates,
provided that the board of directors of the corporation may provide by
resolution or resolutions that some or all of any or all classes or series of
its stock shall be uncertificated shares. Any such resolution shall not apply to
shares represented by a certificate until such certificate is surrendered to the
corporation. Notwithstanding the adoption of such a resolution by the board of
directors, every holder of stock represented by certificates and upon request
every holder of uncertificated shares shall be entitled to have a certificate
signed by, or in the name of the corporation by the chairman or vice-chairman of
the board of directors, or the president or vice-president, and by the chief
financial officer or an assistant treasurer, or the secretary or an assistant
secretary of such corporation representing the number of shares registered in
certificate form. Any or all of the signatures on the certificate may be a
facsimile. In case any officer, transfer agent or registrar who has signed or
whose facsimile signature has been placed upon a certificate has ceased to be
such officer, transfer agent or registrar before such certificate is issued, it
may be issued by the corporation with the same effect as if he were such
officer, transfer agent or registrar at the date of issue.

        The corporation may issue the whole or any part of its shares as partly
paid and subject to call for the remainder of the consideration to be paid
therefor. Upon the face or back of each stock certificate issued to represent
any such partly paid shares, upon the books and records of the corporation in
the case of uncertificated partly paid shares, the total amount of the
consideration to be paid therefor and the amount paid thereon shall be stated.
Upon the declaration of any dividend on fully paid shares, the corporation shall



<PAGE>   23

declare a dividend upon partly paid shares of the same class, but only upon the
basis of the percentage of the consideration actually paid thereon.

        8.4    Special Designation on Certificates
        If the corporation is authorized to issue more than one class of stock
or more than one series of any class, then the powers, the designations, the
preferences, and the relative, participating, optional or other special rights
of each class of stock or series thereof and the qualifications, limitations or
restrictions of such preferences and/or rights shall be set forth in full or
summarized on the face or back of the certificate that the corporation shall
issue to represent such class or series of stock; provided, however, that,
except as otherwise provided in Section 202 of the General Corporation Law of
Delaware, in lieu of the foregoing requirements there may be set forth on the
face or back of the certificate that the corporation shall issue to represent
such class or series of stock a statement that the corporation will furnish
without charge to each stockholder who so requests the powers, the designations,
the preferences, and the relative, participating, optional or other special
rights of each class of stock or series thereof and the qualifications,
limitations or restrictions of such preferences and/or rights.



<PAGE>   24

        8.5    Lost Certificates
        Except as provided in this Section 8.5, no new certificates for shares
shall be issued to replace a previously issued certificate unless the latter is
surrendered to the corporation and cancelled at the same time. The corporation
may issue a new certificate of stock or uncertificated shares in the place of
any certificate theretofore issued by it, alleged to have been lost, stolen or
destroyed, and the corporation may require the owner of the lost, stolen or
destroyed certificate, or his legal representative, to give the corporation a
bond sufficient to indemnify it against any claim that may be made against it on
account of the alleged loss, theft or destruction of any such certificate or the
issuance of such new certificate or uncertificated shares.

        8.6    Construction; Definitions
        Unless the context requires otherwise, the general provisions, rules of
construction, and definitions in the Delaware General Corporation Law shall
govern the construction of these by-laws. Without limiting the generality of
this provision, the singular number includes the plural, the plural number
includes the singular, and the term "person" includes both a corporation and a
natural person.

        8.7    Dividends
        The directors of the corporation, subject to any restrictions contained
in (i) the General Corporation Law of Delaware or (ii) the certificate of
incorporation, may declare and pay dividends upon the shares of its capital
stock. Dividends may be paid in cash, in property, or in shares of the
corporation's capital stock.

        The directors of the corporation may set apart out of any of the funds
of the corporation available for dividends a reserve or reserves for any proper
purpose and may abolish any such reserve. Such purposes shall include but not be
limited to equalizing dividends, repairing or maintaining any property of the
corporation, and meeting contingencies.

        8.8    Fiscal Year
        The fiscal year of the corporation shall be fixed by resolution of the
board of directors and may be changed by the board of directors.

        8.9    Seal
        The corporation may adopt a corporate seal, which may be altered at
pleasure, and may use the same by causing it or a facsimile thereof, to be
impressed or affixed or in any other manner reproduced.

        8.10   Transfer of Stock
        Upon surrender to the corporation or the transfer agent of the
corporation of a certificate for shares duly endorsed or accompanied by proper
evidence of succession, assignation or authority to transfer, it shall be the
duty of the corporation to issue a new



<PAGE>   25

certificate to the person entitled thereto, cancel the old certificate, and
record the transaction in its books.

        8.11   Stock Transfer Agreements
        The corporation shall have power to enter into and perform any agreement
with any number of stockholders of any one or more classes of stock of the
corporation to restrict the transfer of shares of stock of the corporation of
any one or more classes owned by such stockholders in any manner not prohibited
by the General Corporation Law of Delaware.

        8.12   Registered Stockholders
        The corporation shall be entitled to recognize the exclusive right of a
person registered on its books as the owner of shares to receive dividends and
to vote as such owner, shall be entitled to hold liable for calls and
assessments the person registered on its books as the owner of shares, and shall
not be bound to recognize any equitable or other claim to or interest in such
share or shares on the part of another person, whether or not it shall have
express or other notice thereof, except as otherwise provided by the laws of
Delaware.

ARTICLE IX

AMENDMENTS

        The by-laws of the corporation may be adopted, amended or repealed by
the stockholders entitled to vote; provided, however, that the corporation may,
in its certificate of incorporation, confer the power to adopt, amend or repeal
by-laws upon the directors. The fact that such power has been so conferred upon
the directors shall not divest the stockholders of the power, nor limit their
power to adopt, amend or repeal by-laws.