244 BACTERIOLOGY 



Gelatin stab. Liquefaction crateriform. 



Agar slant. Growtii whitisli, 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. 



111. B. septicus (Babes). 



B. Agar smear cultures crumpled. 



112. B. StrassinanniTrtv. 



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

 by Gram's method. 



A. Pathogenic to the smaller animals. 



113. B. dysenteric Kmst. 



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 /a — 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. 



