a. Various clubbed forms from 

 fresh preparations. 



h. Clubs with threads 

 which contain fragments re- 

 sembling cocci. 



c. Threads with fragments like cocci and 

 club-shaped swellings. 



d. Line of growth 

 with threads extending 

 beyond the clubs. 



1*.; 

 •$ 





mm. 



^«ii 



e. Part of a cluster with frag- 

 mentation in the interior. 



/. Section through \ota, perfectly 

 developed cluster. 



Fig. 20 — Formation of clubs in Actinomyces bovis. Harz (after 

 Bostrom). (a. 6, and e are highly magnified — about 1000 to 

 2000 times ; d, e, and /, slightly magnified. ) 

 442 



