236 BACTERIOLOGY 



79. B. MatazoonL 



B. No. 46 Conn : I.e., 1894, 80. 



Morphology. Bacilli 0.4 : 0.8 ju., in chains. Grow at 37°. 



Gelatin colonies. A central nucleus ; border crenate ; clear outer zone. 



Agar slant. Growth thin, whitish to yellowish. 



Potato. Growth yellowish brown. 



Milk. Slowly coagulated ; amphoteric to alkaline. 



Bouillon. Turbid, with a yellowish sediment. 



Habitat. Milk from Matazoon. 



80. B. delictatulus Jordan 



Report of the Mass. State Board of Health, 1890, 837. 



Morphology. Bacilli i.o : 2.0 /x. Grow at 37°- 



Gelatin colonies. Whitish, homogeneous entire, with radiating edges ; in 2 



days a dark nucleus, with a clear zone of liquefied gelatin. 

 Gelatin stab. In 2 days a funnel of liquefaction, with a surface membrane and 



a brownish sediment. 

 Agar slant. Growth glistening, porcelain-white. 

 Potato. Growth thin, gray. 

 Milk. Acid. 



Bouillon. Turbid, with a sediment and a scum. Nitrates reduced. 

 Habitat. Water. 



81. B. circulans Jordan 



1.0. 



Morphology. Bacilli i.o: 2-5 ja; chains. Grow at 37°. 



Gelatin colonies. Round, brownish ; becoming depressions in the liquefied 



gelatin. 

 Gelatin stab. Slight growth along the line of stab ; a conical cavity, with a 



precipitate in the bottom, the liquefied gelatin drying out, leaving a partly 



empty cone. 

 Agar slant. Growth thin, translucent. 

 Potato. A scanty growth, the color of the potato. 

 Bouillon. Turbid ; no membrane. 



Milk. Slowly coagulated and slightly acid. Nitrates reduced to nitrites. 

 Habitat. Water. 



