CLASSIFICATION OF BACTERIA IOQ 



Spirillum. The name vibrio has also been applied by some 

 writers to this genus. 



Genus: Spirillum Ehrenberg. 



The cells are rigid, usually long and forming long, screwlike 

 threads, or, in some cases, only portions of a spiral turn. 

 Cells are motile and possess a tuft of flagella at the pole. The 

 flagella may occur at both ends of the spiral, and they vary 

 greatly in number. Endospore formation has been observed 

 in some species. 



Genus : Spirochaeta Ehrenberg. 



The cells are flexible spirals, very thin and long. No 

 flagella are present. These bacteria move by rotation simi- 

 lar to a screw, and also by lateral motion similar to a snake. 

 The locomotive organs if present are not known. No endo- 

 spores are produced. 



II. Suborder: Trichobacterince (Higher Bacteria). 

 Family : Chlamydobacteriaceae Migula. 



The cells are cylindrical, are united in threads, and sur- 

 rounded by a sheath. Reproduction takes place by means 

 of motile and nonmotile gonidia. These gonidia arise directly 

 from the vegetative cells and without any resting stage pro- 

 duce new threads of cells. 



Genus : Chlamydothrix Migula. 



The cells are cylindrical, nonmotile, and arranged in un- 

 branched threads and surrounded by a sheath of varying 



