274 BACTERIOLOGY 



184. B. stellatus 



B. lactii No. g FlUgge : Zeitsch. f. Hygiene, XVII, 1894, 994. 



Morphology. Bacilli long. 



Gelatin colonies. With radiating outgrowths. 



Agar slant. Growth waxy, crumpled. 



Potato. Growth whitish yellowish, crumpled. 



Bouillon. Turbid, with a crumpled pellicle. 



Milk. Peptonized. 



Habitat. Milk. 



185. B. cremoris 



B. lactis.No. 10 Fliigge: I.e. 



Morphology. Bacilli small filaments. Like the preceding in cultural char- 

 acters, but with a thick creamy layer on bouillon. 

 Habitat. Milk. 



186. B. denitrificans Schirokikh 



Centralblatt I Bakteriol., 2te Abt., II, 1896, 204. 



Morphology. Bacilli 1.5-2 fi times their breadth, ends rounded, in chains of 



2-8. Obligate aerobic. Optimum temperature, 37 . 

 Gelatin colonies. In 2 days, 1-2 mm., round irregular; liquefied gelatin 



bluish ; containing granules. 

 Gelatin stab. Liquefaction infundibuliform, with a granular sediment. 

 Agar colonies. In 24 hours at 37 starred, or like a snow crystal ; centres 



papillate, yellowish, elevated. 

 Potato. Growth brownish, crumpled, stringy. 

 Bouillon. Turbid, with a white, crumpled pellicle. 

 Milk. Peptonized. 

 Habitat. Isolated from horse manure. 



187. B. detrudens Wright 



I.e., 452. 



Morphology. Bacilli medium-sized, blunt, 2-3 times their breadth. Flagella 



peritrichic. 

 Gelatin colonies. Deep colonies : round oval, brownish, entire, or beset with 



plaques or buds. Surface colonies: round, whitish, translucent, entire 



disks. Microscopically, brownish, granular, entire, with a wide zone of 



clouded, liquefied gelatin. 

 Agar slant. Growth creamy white, opaque, and glistening. 



