CLASSIFICATION 33 



FISCHER'S CLASSIFICATION OF BACTERIA. 

 ORDER 1. HAPLOBACTERINAE. 



Vegetative phase unicellular, spherical, cylindrical, or 

 spirally twisted; isolated or united in chains or clusters. 



FAMILY 1. COCCACEAE. 



Vegetative cell spherical. 



SUB-FAMILY 1. ALLOCOCCACEAE. 



Planes of fission without definite sequence ; no pro- 

 nounced colonies or growth-forms, cells isolated or in short 

 chains or irregular clusters. 



G-enus MICROCOCCUS Cohn. Non-motile. Includes most 

 cocci, the pathological 'staphylococci,' etc. 



Genus PLANOCOCCUS Migula. Motile. 



SUB-FAMILY 2. HOMOCOCCACEAE. 



Planes of fission in definite sequence. 



Genus SARCINA Goodsir. Three planes of division at 

 right angles to each other. Cubical colonies, non-motile. 



Genus PLANOSARCINA Migula. Similar to Sarcina, but 

 monotrichous, ciliate, and motile. 



Genus PEDIOCOCCUS Lindner. Two planes of fission 

 alternate and at right angles. Micrococcus tetragenous, 

 Thiopedia ( a sulphur organism), and probably some species 

 usually termed micrococcus. 



Genus STREPTOCOCCUS Billroth. Planes of fission 

 parallel, giving rise to chains. The pathological Streptococ- 

 ci and Leuconostoc. 



FAMILY 2. BACILLACEAE. 



Vegetative cell straight, cylindrical, ellipsoidal, or egg- 

 shaped; very short forms difficult to distinguish from cocci. 

 Fission always transverse. 



SUB-FAMILY 1. BACILLEAE. 



Spore-forming rods cylindrical, unchanged. 



