CLASSIFICATION OF BACTERIA 105 



two, or three planes. Reproduction takes place by vegetative 

 multiplication (fission). Resting stages in the form of en- 

 dospores are produced by many species. Motility is noted in 

 some genera, and this is due to flagella. In Beggiatoa and 

 Spirochaeta the organs of locomotion are not definitely 

 known. 



I. ORDER : EUBACTERIA (True Bacteria). 



The cells are devoid of any nucleus (Zentralkorper) and 

 free from sulphur and bacteriopurpurin, colorless or faintly 

 colored. 



I, Suborder: Haplobacterina (Lower Bacteria). 



I. Family : Coccaceae (Zopf) Mig. 



The cells are globular when in a free state, but in the various 

 stages of division appear somewhat elliptical. A few species in 

 this family are motile. Cell division takes place in all direc- 

 tions of space. Frequently the cells remain attached together, 

 and under these conditions usually show some flattening of the 

 cell at the point of junction with the cell next to it. 



Genus : Streptococcus Billroth. 



The cells are globular and do not possess any organs of 

 locomotion. Cell division takes place in only one plane. 

 Usually the cells remain united together after division, pro- 

 ducing chains or diplococcus forms. No endospores have 

 been noted. 



