244 BACTERIOLOGY 



Gelatin stab. Liquefaction crateriform. 



Agar slant. Growth whitish, with a slight greenish tint. 



Bouillon. Turbid, with a membrane. 



Habitat. Isolated from fermenting urine. 



CLASS IV. WITH ENDOSPORES. AEROBIC AND FACULTATIVE ANA- 

 EROBIC, COLONIES ON GELATIN PLATES BECOMING STREAMING, 

 FORKED, AMEBOID, TWISTED, IRREGULAR, COCHLEATE GELA- 

 TIN LIQUEFIED. STAINED BY GRAM'S METHOD. 



I. Gelatin colonies typical of the group, i.e. ameboid cochleate. 



A. Agar smear cultures smooth. 



1. Potato cultures white, gray-yellowish, not distinctly* brown. 



a. Milk coagulated. 



107. B. vulgaris (Hauser). 



108. B. mirabilis (Hauser) Trev. 



109. B. No. VII Pansini. 



b. Milk not coagulated. 



no. B. sulphur eus (Holschewnikoff). 



2. Potato cultures brownish ; cause septicaemia in mice. 



in. B. septicus (Babes). 



B. Agar smear cultures crumpled. 



112. B. Strassmanni Trev \ 



II. Gelatin colonies ciliate radiate; related to B. centrifugans. Stained 

 by Gram's method. 



A. Pathogenic to the smaller animals. 



113. B. dys enter ice Kruse. 



B. Not pathogenic to the smaller animals. 



114. B. Pansini. 



107. B. vulgaris (Hauser) 



Proteus vulgaris Hauser: Ueber Faulnissbakterien, 1885. 

 B. proteus Trevisan : Genera, 1889. 



Morphology. Bacilli 0.6: 1.2-4.0 /1 threads to chains, in floccose arrange- 

 ment. Flagella numerous, peritrichic. 



Gelatin colonies. In 6-8 hours, small depressions, which contain liquefied 

 gelatin and grayish white masses of bacteria; from the edge, ameboid 

 processes. 



Gelatin stab. Liquefaction saccate. 



Agar slant. Growth slimy, moist, glistening, translucent. 



