THE CLASSIFICATION OF BACTERIA 285 



Bouillon. Turbid. 



Pepton rosolic acid solution. Becomes lighter ; decolorized in z weeks. 



Litmus milk. Alkaline, not coagulated, becoming translucent, and in 2 weeks 



violet. 

 Glucose bouillon. No gas. Indol negative. Grow at 36°. 

 Habitat. Soil. 



219. B. cuticularis 



B. cuticularis-albus Tataroff: Die Dorpater Wasserbakterien, Dorpat, 1891, 24. 



Morphology. Bacilli 3.2 /* long, variously bent filaments, in pairs. 



Gelatin colonies. Deep colonies: round — oval, entire. Surface colonies: irreg- 

 ular, bluish white, opalescent ; microscopically, brownish, edge irregular, 

 granular. 



Gelatin stab. In depth, beaded ; later with ligulate outgrowths ; surface 

 growth, irregular — rosette-shaped, white, glistening, spreading. 



Agar slant. Growth white, glistening, spreading. 



Bouillon. Turbid, white sediment, flocculent particles in the fluid, and a 

 whitish pellicle. 



Potato. Growth thick, moist, glistening, brownish ; surface irregular, becom- 

 ing reddish brown — yellowish brown. 



Habitat. Water. 



220. B. Foutini 



Bacillus D Foutin: Centralblatt f. Bakteriol., VII, 1890, 373. 



Morphology. Bacilli 1.0:5-20 /u., thinner at the poles, which are slightly 



rounded; one to four spores in a single rod ; slightly motile. 

 Gelatin stab. In depth, growth beaded ; on the surface, a nailhead growth. 

 Agar slant. Growth limited, rather thick, with mother-of-pearl iridescence. 

 Potato. Growth somewhat raised, yellow, limited. 

 Pathogenesis. Non-pathogenic. 

 Habitat. Isolated from hail. 



CLASS XVII. WITH ENDOSPORES. AEROBIC AND FACULTATIVE 

 ANAEROBIC. RODS NOT SWOLLEN AT SPORULATION. POTATO 

 CULTURES DEVELOPING A RED PIGMENT, CHROMOGENIC IN 

 PART. 



I. Agar smear cultures yellowish to reddish. 



221. B. coccineus Pansini. 

 II. Agar smear cultures whitish or grayish. 



1. Milk coagulated. 



223. B. viscosus. 



2. Milk not coagulated. 



224. B. vitalis. 



