THE CLASSIFICATION OF BACTERIA 373 



J3. Not as above specified. Grow more or less readily on culture media. 



1. Gelatin liquefied. 



a. Growth on gelatin or agar pinkish reddish. 



3. Cladothrix rufula Wright. 



b. Growth on gelatin whitish. 



* Gelatin stained brownish by the growth of the organism. 



4. Cladothrix dichotoma Cohn. 



5 . Cladothrix profundus Ravenel. 



6. Cladothrix intestinalis Ravenel. 

 ** Gelatin not stained brownish. 



f Colonies on agar distinctly stellate in form. 



7. Cladothrix invulnerabilis Acosta-Grande-Rossi. 

 ft Colonies on gelatin floccose filamentous. 



8. Cladothrix fungiformis Ravenel. 



9. Cladothrix intrica Russell. 



2. Gelatin not liquefied. 



10. Cladothrix non-liquefaciens Ravenel. 



i. Cladothrix natans (Kiitzing) Migula 



Sphcerotilus natans Kiitzing: Linnaea. VIII, 1833, 385. 



Cladoihrix natans Migula: Die Natiirlichen Pflanzenfam., 1895, 46. 



Filaments composed of rod-like elements, surrounded by a thick gelatinous 

 sheath. Show false branching like Cladothrix dichotoma. Eventually 

 round strongly refracting bodies form within the rods, which germinate 

 either outside or within the mother cells. 



Habitat. Found as slimy particles in factory water. 



2. Cladothrix ochracea (Kiitzing) Winogradsky 



Leptothrtx ochracea Kiitzing: Species Algarum, 147. 

 . Cladothrix ochracea Winogradsky. 



In morphology like Cladothrix dichotoma ; distinguished from the latter by the 

 accumulation in the sheath of hydrated oxide of iron. Does not grow in 

 ordinary culture media. 



3. Cladothrix rufula Wright 



I.e., 433- 



Filaments long slender branched, which in stained preparations are seen to 

 be composed of rather long undulate segments, separated by a clear 

 interval. In the mature condition, deeply stained bodies of a diameter 

 2-3 times the width of the filament are seen. 



