1 86 BACTERIOLOGY. 



Genera : Leptothrix, Beggiatoa, Crenothrix, Phragmi- 

 diothrix. 



4. Cladotricheae. Possessing cocci, rods, threads, 

 and spirals. Thread-forms provided with false branchings. 

 Genus : Cladothrix. 



Zopf, however, does not assert that all the fission- 

 fungi exhibit this pleomorphism, nor does he 

 pretend that his classification will include all the 

 micro-organisms described. Cohn, on the other 

 hand, was ready to admit that all the forms 

 described by him were not truly independent 

 species. Quite recently De Bary, Hueppe, Baum- 

 garten, and Flugge have expressed new views with 

 regard to the classification of bacteria. 



De Bary divides them into two great groups 

 bacteria which form endospores, and bacteria which 

 form arthrospores. This affords but little practical 

 assistance, though regarded by botanists, from a 

 scientific standpoint, as a step in the right 

 direction. 



Hueppe, acknowledging that the fructification 

 must eventually be made the basis for classification, 

 suggests an arrangement for provisional use in 

 which this view is introduced. 



