THE CLASSIFICATION OF BACTERIA 259 



Potato. Growth reddish, later shows a bronze shimmer. 



Milk. Coagulated, peptonized. 



Glucose bouillon. No gas, acid. Pigment soluble in alcohol, chloroform, 

 and carbon bisulphide, less so in ether, and with difficulty in water. The 

 addition of an alkali renders the red-violet solution of the pigment yellow. 

 The most suitable medium is a sodium tartrate pepton agar. 



144. B. carneus Kruse 



Fleischfarhiger Bacillus Tils : Zeitsch. f. Hygiene, IX, 1890, 316. 

 B. carneus Kruse : Fliigge, Die Mikroorganismen, 1896. 

 B. camicolor Franltland : Microorganisms of Water. 



Morphology. Bacilli 0.5 : 2.0 yu,. 



Gelatin colonies. In 2 days round, sharp ; liquefaction crateriform ; centre 



darker and finely granular ; outer zone colorless or concentric. 

 Gelatin stab. Liquefaction infundibuliform, with a rose-colored sediment. 

 Agar slant and potato. Growth flesh red. 

 Habitat. Water. 



■CLASS X. WITHOUT ENDOSPORES. AEROBIC AND FACULTATIVE 

 ANAEROBIC. CHROMOGENIC ; PIGMENT REDDISH. GELATIN 

 NOT LIQUEFIED. 



I. Small, slender bacilli. 



146. B. rubefaciens Zimmerman. 

 II. Large, stout bacilli. 



147. B. rubescens Jordan. 



146. B. rubefaciens Zimmerman 



Bak. Trink u. Nutzwasser, 1890. 



Morphology. Bacilli 0.3 : 0.7-1 .6 jn. 



Gelatin colonies. Deep : round, small, yellowish brown. Surface : flat, 



white-reddish. 

 Gelatin stab. In depth, a uniform growth ; on the surface, growth grayish 



white to yellowish, becoming wine-colored. 

 Agar slant. Growth thick, grayish blue. 

 Potato. Growth yellow-brown, with flesh-colored edge. 

 Habitat. Water. 



