SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                  SCHEDULE 13G
                                 (Rule 13d-102)


             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
           TO RULES 13d-1(b)(c), AND (d) AND AMENDMENTS THERETO FILED
                            PURSUANT TO RULE 13d-2(b)

                         (Amendment No.____________)(1)


                               Misonix Inc. (MSON)
--------------------------------------------------------------------------------
                                (Name of Issuer)


                          Common Stock, $.01 par value
--------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                    604871103
--------------------------------------------------------------------------------
                                 (CUSIP Number)


                                  July 22, 2005
--------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)


     Check the  appropriate  box to  designate  the rule  pursuant to which this
Schedule is filed:

          [_]  Rule 13d-1(b)

          [X]  Rule 13d-1(c)

          [_]  Rule 13d-1(d)


----------
(1)  The  remainder  of this  cover  page  shall be filled  out for a  reporting
     person's  initial  filing on this form with respect to the subject class of
     securities,  and for any subsequent amendment containing  information which
     would alter the disclosures provided in a prior cover page.

     The  information  required in the remainder of this cover page shall not be
deemed to be "filed"  for the purpose of Section 18 of the  Securities  Exchange
Act of 1934 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. 604871103
          ---------------------


1.   NAME OF  REPORTING  PERSONS
     I.R.S.  IDENTIFICATION  NO.  OF ABOVE  PERSONS (ENTITIES ONLY)

     Bonanza Capital, Ltd.

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [X]

3.   SEC USE ONLY

4.   CITIZENSHIP OR PLACE OF ORGANIZATION

     Texas

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH

5.   SOLE VOTING POWER

     0

6.   SHARED VOTING POWER

     365,000

7.   SOLE DISPOSITIVE POWER

     0

8.   SHARED DISPOSITIVE POWER

     365,000

9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     365,000

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

                                                                          [_]

11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

     5.35%

12.  TYPE OF REPORTING PERSON*

     PN

--------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



CUSIP No. 604871103
          ---------------------


1.   NAME OF  REPORTING  PERSONS
     I.R.S.  IDENTIFICATION  NO.  OF ABOVE  PERSONS (ENTITIES ONLY)

     Bonanza Master Fund, Ltd.

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                        (a) [_]
                                                                        (b) [X]

3.   SEC USE ONLY


4.   CITIZENSHIP OR PLACE OF ORGANIZATION

     Cayman Islands

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH

5. SOLE VOTING POWER

     0

6.   SHARED VOTING POWER

     365,000

7.   SOLE DISPOSITIVE POWER

     0

8.   SHARED DISPOSITIVE POWER

     365,000

9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     365,000

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

                                                                          [_]

11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

     5.35%

12.  TYPE OF REPORTING PERSON*

     CO

--------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



CUSIP No.  604871103
           ---------------------


Item 1(a).  Name of Issuer:


            Misonix Inc.
            --------------------------------------------------------------------

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

            1938 New Highway, Farmingdale, New York 11735
            --------------------------------------------------------------------


Item 2(a).  Name of Person Filing:

            Bonanza Capital, Ltd.
            Bonanza Master Fund, Ltd.

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

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

            300 Crescent Court, Suite 1740
            Dallas, Texas 75201
            --------------------------------------------------------------------

Item 2(c).  Citizenship:

            Bonanza Capital, Ltd. - Texas
            Bonanza Master Fund, Ltd. - Cayman Islands
--------------------------------------------------------------------

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

            Common Stock, $.01 par value
            --------------------------------------------------------------------

Item 2(e).  CUSIP Number:


            604871103
            --------------------------------------------------------------------


Item 3.     If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b)
            or (c), Check Whether the Person Filing is a:

     (a)       [_] Broker or dealer registered under Section 15 of the Exchange
               Act.

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

     (c)       [_] Insurance company as defined in Section 3(a)(19) of the
               Exchange Act.

     (d)       [_] Investment company registered under Section 8 of the
               Investment Company Act.

     (e)       [_] An investment adviser in accordance with Rule
               13d-1(b)(1)(ii)(E);

     (f)       [_] An employee benefit plan or endowment fund in accordance with
               Rule 13d-1(b)(1)(ii)(F);

     (g)       [_] A parent holding company or control person in accordance with
               Rule 13d-1(b)(1)(ii)(G);

     (h)       [_] A savings association as defined in Section 3(b) of the
               Federal Deposit Insurance Act;

     (i)       [_] A church plan that is excluded from the definition of an
               investment company under Section 3(c)(14) of the Investment
               Company Act;

     (j)       [_] Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

Item 4.  Ownership.

     Provide  the  following  information  regarding  the  aggregate  number and
percentage of the class of securities of the issuer identified in Item 1.

     (a)  Amount beneficially owned:

            Bonanza Capital, Ltd. - 365,000
            Bonanza Master Fund, Ltd. - 365,000
          ----------------------------------------------------------------------

     (b)  Percent of class:

            Bonanza Capital, Ltd. - 5.35%
            Bonanza Master Fund, Ltd. - 5.35%

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

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

Bonanza Capital, Ltd.:

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


          (ii)  Shared power to vote or to direct the vote             365,000
                                                          ---------------------,


          (iii) Sole power to dispose or to direct the                 0
                disposition of                            _____________________,


          (iv)  Shared power to dispose or to direct the               365,000
                disposition of                            _____________________.


Bonanza Master Fund, Ltd.:

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


          (ii)  Shared power to vote or to direct the vote             365,000
                                                          ---------------------,


          (iii) Sole power to dispose or to direct the                 0
                disposition of                            _____________________,


          (iv)  Shared power to dispose or to direct the               365,000
                disposition of                            _____________________.


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

     If this  statement  is being  filed to report  the fact that as of the date
hereof the reporting  person has ceased to be the beneficial  owner of more than
five percent of the class of securities check the following [ ].


         Not applicable


Item 6.     Ownership of More Than Five Percent on Behalf of Another Person.

     If any other  person is known to have the right to  receive or the power to
direct the receipt of dividends  from,  or the  proceeds  from the sale of, such
securities,  a statement  to that effect  should be included in response to this
item and, if such interest relates to more than five percent of the class,  such
person  should be  identified.  A listing of the  shareholders  of an investment
company registered under the Investment Company Act of 1940 or the beneficiaries
of employee benefit plan, pension fund or endowment fund is not required.


         Not applicable


Item 7.     Identification and Classification of the Subsidiary Which Acquired
            the Security Being Reported on by the Parent Holding Company or
            Control Person.

     If a parent  holding  company  or Control  person has filed this  schedule,
pursuant to Rule  13d-1(b)(1)(ii)(G),  so indicate under Item 3(g) and attach an
exhibit  stating the  identity  and the Item 3  classification  of the  relevant
subsidiary.  If a parent  holding  company  or  control  person  has filed  this
schedule  pursuant to Rule 13d-1(c) or Rule 13d-1(d),  attach an exhibit stating
the identification of the relevant subsidiary.


         Not applicable


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

     If a group has filed this schedule  pursuant to  ss.240.13d-1(b)(1)(ii)(J),
so indicate under Item 3(j) and attach an exhibit  stating the identity and Item
3 classification of each member of the group. If a group has filed this schedule
pursuant to  ss.240.13d-1(c) or  ss.240.13d-1(d),  attach an exhibit stating the
identity of each member of the group.


         Not applicable


Item 9.  Notice of Dissolution of Group.

     Notice of dissolution of a group may be furnished as an exhibit stating the
date  of  the   dissolution  and  that  all  further  filings  with  respect  to
transactions in the security reported on will be filed, if required,  by members
of the group, in their individual capacity. See Item 5.


          Not applicable

Item 10.  Certifications.

          By signing below I certify that, to the best of my knowledge and
          belief, the securities referred to above were not acquired and are not
          held for the purpose of or with the effect of changing or influencing
          the control of the issuer of the securities and were not acquired and
          are not held in connection with or as a participant in any transaction
          having such purpose or effect.


                                    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.


                                                     August 1, 2005
                                        ----------------------------------------
                                                        (Date)


                                        Bonanza Capital, Ltd.*

                                           By: Bonanza Fund Management, Inc.
                                                 Its General Partner

                                                By:  /s/ Bernay Box
                                                --------------------------
                                                  Bernay Box
                                                  President



                                        Bonanza Master Fund, Ltd.*

                                           By: Bonanza Capital, Ltd.
                                               Its Investment Manager

                                               By: Bonanza Fund Management, Inc.
                                                       Its General Partner

                                                      By:  /s/ Bernay Box
                                                      --------------------------
                                                        Bernay Box
                                                        President


Note.  Schedules  filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Rule 13d-7 for other parties
for whom copies are to be sent.

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

* The Reporting Persons disclaim beneficial ownership in the Shares reported
herein except to the extent of their pecuniary interest therein.






                                                                       Exhibit A


                                    AGREEMENT

The  undersigned  agree that this  Schedule 13G dated August 1, 2005 relating to
the Common Stock, $.01 par value of Misonix Inc. (MSON) shall be filed on behalf
of the undersigned.

                                        Bonanza Capital, Ltd.*

                                              By: Bonanza Fund Management, Inc.
                                                    Its General Partner

                                                    By:  /s/ Bernay Box
                                                    --------------------------
                                                      Bernay Box
                                                      President



                                        Bonanza Master Fund, Ltd.*

                                             By: Bonanza Capital, Ltd.
                                                 Its Investment Manager

                                               By: Bonanza Fund Management, Inc.
                                                     Its General Partner

                                                     By:  /s/ Bernay Box
                                                     --------------------------
                                                       Bernay Box
                                                       President

23214.0001 #589414