SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, DC  20549
                            --------------------


                                  FORM 8-A

              FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                  PURSUANT TO SECTION 12(b) OR 12(g) OF THE
                       SECURITIES EXCHANGE ACT OF 1934
                            --------------------


                          HEMAGEN DIAGNOSTICS, INC.
                          -------------------------
           (Exact Name of Registrant as Specified in Its Charter)


       DELAWARE                                   04-2869857
       --------                                   ----------
(State of Incorporation                        (I.R.S. Employer
    or Organization)                          Identification No.)


     40 Bear Hill Road, Waltham, MA                   02451
     ------------------------------                   -----
(Address of Principal Executive Offices)            (Zip Code)


         If this form relates to the registration of a class of securities 
         pursuant to Section 12(b) of the Exchange Act and is effective 
         pursuant to General Instruction A.(c), please check the following 
         box.  [ ]

         If this form relates to the registration of a class of securities 
         pursuant to Section 12(g) of the Exchange Act and is effective 
         pursuant to General Instruction A.(d), please check the following 
         box.  [ ]

Securities Act registration statement file number to which this form 
relates:____

Securities to be registered pursuant to Section 12(b) of the Act:

      Title of Each Class     Name of Each Exchange on Which
      To be so Registered     Each Class is to be Registered
      -------------------     ------------------------------

             NONE                          NONE


Securities to be registered pursuant to Section 12(g) of the Act:


                        Common Share Purchase Rights
                        ----------------------------
                              (Title of Class)


Item 1.  Description of Registrant's Securities to be Registered.

      On January 27, 1999, the Board of Directors of Hemagen Diagnostics, 
Inc. (the "Company") declared a dividend distribution of one common share 
purchase right (a "Right") for each outstanding share of common stock, par 
value $0.01 per share (the "Common Shares"), of the Company.  The dividend 
is payable on February 10, 1999 (the "Record Date") to the stockholders of 
record on that date.  Except as described below, each Right, when 
exercisable, entitles the registered holder to purchase from the Company one 
Common Share of the Company at a price of $4.00 per Common Share (the 
"Purchase Price"), subject to adjustment.  The description and terms of the 
Rights are set forth in a Rights Agreement (the "Rights Agreement") between 
the Company and Continental Stock Transfer & Trust Company, as Rights Agent 
(the "Rights Agent").

      Initially, the Rights will be attached to all certificates 
representing Common Shares then outstanding, and no separate Rights 
certificates will be distributed.  Until the earlier to occur of (i) 10 
business days following a public announcement that a person or group of 
affiliated or associated persons (an "Acquiring Person") have acquired 
beneficial ownership of 15% or more of the outstanding Common Shares (the 
date of such an announcement being a "Shares Acquisition Date"), or (ii) 10 
business days (or such later date as may be determined by action of the 
Board of Directors prior to such time as any Person becomes an Acquiring 
Person) following the commencement of, or announcement of an intention to 
make, a tender offer or exchange offer the consummation of which would 
result in the beneficial ownership by a person or group of 15% or more of 
such outstanding Common Shares, the Rights will be evidenced, with respect 
to any of the Common Share certificates outstanding as of the Record Date, 
by such Common Share certificates together with a copy of this Summary of 
Rights.

      The Rights Agreement provides that, until the Distribution Date, the 
Rights will be transferred with and only with the Common Shares.  Until the 
Distribution Date (or earlier redemption or expiration of the Rights), new 
Common Share certificates issued after the Record Date upon transfer or new 
issuance of Common Shares will contain a notation incorporating the Rights 
Agreement by reference.  Until the Distribution Date (or earlier redemption 
or expiration of the Rights), the surrender for transfer of any certificates 
for Common Shares outstanding as of the Record Date, even without such 
notation or a copy of this Summary of Rights being attached thereto, will 
also constitute the transfer of the Rights associated with the Common Shares 
represented by such certificate.  As soon as practicable following the 
Distribution Date, separate certificates evidencing the Rights ("Rights 
Certificates") will be mailed to holders of record of the Common Shares as 
of the close of business on the Distribution Date, and the separate Rights 
Certificates alone will evidence the Rights.

      The Rights are not exercisable until the Distribution Date.  The 
Rights will expire on January 27, 2009 (the "Final Expiration Date"), unless 
the Rights are earlier redeemed by the Company, as described below.

      The Purchase Price payable, and the number of Common Shares or other 
securities or property issuable, upon exercise of the Rights are subject to 
adjustment from time to time to prevent dilution (i) in the event of a stock 
dividend on, or a subdivision, combination or reclassification of, the 
Common Shares, (ii) upon the grant to holders of the Common Shares of 
certain rights or warrants to subscribe for or purchase Common Shares at a 
price, or securities convertible into Common Shares with a conversion price, 
less than the then current market price of the Common Shares or (iii) upon 
the distribution to holders of the Common Shares of evidences of 
indebtedness or assets (excluding regular periodic cash dividends paid out 
of earnings or retained earnings or dividends payable in Common Shares) or 
of subscription rights or warrants (other than those referred to above).

      The number of outstanding Rights and the number of Common Shares 
issuable upon exercise of each Right are also subject to adjustment in the 
event of a stock split of the Common Shares or a stock dividend on the 
Common Shares payable in Common Shares or subdivisions, consolidations or 
combinations of the Common Shares occurring, in any such case, prior to the 
Distribution Date.

      Common Shares purchasable upon exercise of the Rights will not be 
redeemable.

      In the event that, after the first date of public announcement by the 
Company or an Acquiring Person that an Acquiring Person has become such, the 
Company is involved in a merger or other business combination transaction in 
which the Common Shares are exchanged or changed, or 50% or more of the 
Company's consolidated assets or earning power are sold (in one transaction 
or a series of transactions), proper provision will be made so that each 
holder of a Right (other than an Acquiring Person) will thereafter have the 
right to receive, upon the exercise thereof at the then current exercise 
price of the Right, that number of shares of common stock of the acquiring 
company (or, in the event there is more than one acquiring company, the 
acquiring company receiving the greatest portion of the assets or earning 
power transferred) which at the time of such transaction would have a market 
value of two times the exercise price of the Right.

      In the event that any person becomes an Acquiring Person, each holder 
of a Right will thereafter have the right to receive upon exercise that 
number of Common Shares having a market value of two times the exercise 
price of the Right.  Upon occurrence of any of the events described in the 
immediately preceding sentence, any Rights that are, or (under certain 
circumstances specified in the Rights Agreement) were, beneficially owned by 
any Acquiring Person shall immediately become null and void.

      At any time after the occurrence of any such event and prior to the 
acquisition by such person or group of 50% or more of the outstanding Common 
Shares, the Board of Directors may exchange the Rights (other than Rights 
owned by such person or group which have become void), in whole or in part, 
at an exchange ratio of one Common Share per Right (subject to adjustment).

      With certain exceptions, no adjustment in the Purchase Price will be 
required until cumulative adjustments require an adjustment of at least 1% 
in such Purchase Price.  No fractional Common Shares will be issued and in 
lieu thereof, an adjustment in cash will be made based on the market price 
of the Common Shares on the last trading day prior to the date of exercise.

      At any time prior to the earlier of (i) the tenth day after a Shares 
Acquisition Date, or (ii) the expiration of the Rights, the Board of 
Directors may redeem the Rights in whole, but not in part, at a price of 
$.001 per Right (the "Redemption Price"). The redemption of the Rights may 
be made effective at such time on such basis and with such conditions as the 
Board of Directors in its sole discretion may establish.  Immediately upon 
any redemption of the Rights, the right to exercise the Rights will 
terminate and the only right of the holders of Rights will be to receive the 
Redemption Price.

      Other than those provisions relating to the principal economic terms 
of the Rights, any of the provisions of the Rights Agreement may be amended 
by the Board of Directors of the Company prior to the Distribution Date.  
After the Distribution Date, the provisions of the Rights Agreement may be 
amended by the Board in order to cure any ambiguity, to make changes that do 
not adversely affect the interests of holders of Rights (excluding the 
interests of any Acquiring Person), or to shorten or lengthen any time 
period under the Rights Agreement; provided, however, that no amendment to 
adjust the time period governing redemption shall be made at such time as 
the Rights are not redeemable.

      Until a Right is exercised, the holder thereof, as such, will have no 
rights as a stockholder of the Company, including, without limitation, the 
right to vote or to receive dividends.

      The Rights have certain anti-takeover effects.  The Rights will cause 
substantial dilution to a person or group that attempts to acquire the 
Company on terms not approved by the Company's Board of Directors.  The 
Rights should not interfere with any merger or other business combination 
approved by the Board of Directors since the Rights may be redeemed by the 
Company at $.001 per Right prior to the time that a person or group has 
acquired beneficial ownership of 15% or more of the Common Shares.

      The form of Rights Agreement between the Company and the Rights Agent 
specifying the terms of the Rights, which includes as Exhibit A the form of 
Rights Certificate, is attached hereto as an exhibit and incorporated herein 
by reference.  The foregoing description of the Rights does not purport to 
be complete and is qualified in its entirety by reference to the Rights 
Agreement.


Item 2.  Exhibits.

      1.  Rights Agreement (including Form of Rights Certificate as Exhibit 
A thereto and the Summary of Rights to Purchase Common Shares as Exhibit B 
thereto), dated as of January 27, 1999, between the Company and Continental 
Stock Transfer & Trust Company, Rights Agent.

      2.  Press Release, dated February 1, 1999  (incorporated herein by 
reference to Exhibit 99.2 to the Company's Report on Form 8-K filed on 
February 10, 1999 (File No. 1-11700)).


                                  SIGNATURE

      Pursuant to the requirements of Section 12 of the Securities Exchange 
Act of 1934, the registrant has duly caused this registration statement to 
be signed on its behalf by the undersigned, thereto duly authorized.

                                       HEMAGEN DIAGNOSTICS, INC.


                                       By:  
                                           -------------------------
                                           Name:  Carl Franzblau, Ph.D.
                                           Title: President, Chief 
                                                  Executive Officer and 
                                                  Chairman of the Board

Date:  February 10, 1999