I4 6 BACTERIOLOGY 



64. Bact. acidum 



No. 56 of Conn : I.e., 83. 



Morphology. Bacilli 0.8-1.2 /x ; in pairs and chains. Grow at 35 C. 

 Gelatin colonies. Large, white, thin, translucent, irregular lobate ; surface 



irregular. 



Gelatin stab. Good growth in depth ; on surface, growth thin, with an irregu- 

 lar border. 



Agar slant. Growth thin, white, spreading. 

 Bouillon. Slightly turbid ; sediment white. 



Habitat. Milk. 



65. Bact. Connii 



No. tf Conn: I.e., 83. 



Morphology. Bacilli 0.8 : I .o /x. Slight growth at 35 C. 

 Gelatin colonies. White, spreading, granular, entire. 

 Gelatin stab. Surface growth thin, translucent, spreading. 

 Agar slant. Growth white. 

 Potato. Growth elevated, yellowish, spreading. 

 Bouillon. Clear, with flaky sediment. 



Habitat. Milk. 



66. Bact. nitrovorum (Jensen) 



B. nitrovorus Jensen : Centralblatt f. Bakteriol., 2d Abt., IV, 1898, 450. 



Morphology. On agar and in bouillon bacilli 0.5 : 0.5-2.0 /A. No polar stain. 



Gelatin colonies. Deep : in 4-5 days scarcely visible. Surface : white, moist, 

 glistening, entire, 0.2-0.5 mm - 



Agar colonies. In 3 days, at 30 C. Deep : small, yellowish, entire. Sur- 

 face : dirty white, slimy, 2-4 mm. 



Gelatin stab. In depth, growth fine, pearly. On the surface, growth 6-10 

 mm., white, often concentric. 



Gelatin slant. Slight growth, moist, glistening, bluish yellowish, knotty, 

 very limited. 



Agar slant. Growth moist, slimy, grayish bluish white, limited. 



Nitrate bouillon. In one day a weak turbidity, becoming clear ; a faint 

 pellicle, and a granular sediment. Nitrates reduced to nitrites. 



Habitat. Isolated from horse manure. 



67. Bact. filefaciens (Jensen) 



B. filefaciens Jensen : Centralblatt f. Bakteriol., 2d Abt., IV, 1898, 409. 

 Morphology. On agar bacilli 0.5-0.7 : 0.5-1. 5 /u,; in nitrate bouillon, 0.5-0.7 : 

 1.0-2.5 /* 



