THE CLASSIFICATION OF BACTERIA 269 



165. B. aureus Pansini 



Virchow's Archiv, CXXII. 



Morphology. Bacilli slender threads. 



Gelatin colonies. With a Strahlenkranz. 



Gelatin stab. With lateral outgrowths, a membrane, and a yellowish sediment. 



Agar slant. Growth rugose. 



Potato. Growth sulphur golden yellow. Bouillon turbid, with a membrane. 



Habitat. Sputum. 



166. B. Pasteuri Miquel 



Urobacillus Pasteuri Miquel : Ann. Micrographie, 1889-98. 



Morphology . Bacilli large, dimensions variable. 



Gelatin colonies. With urea, in 24 hours, minute, surrounded by dumb-bell- 

 shaped crystals ; give off odor of NH 3 . In urine, an alkaline fermenta- 

 tion and an abundant deposit of ammonia-magnesic-phosphate and 

 alkaline urates. This deposit acquires a blackish color. 



Habitat. Urine. 



167. B. Freudenreichii Miquel 



Urobacillus Freudenreichii Miquel : I.e. 

 Not clearly differentiated from the preceding. 



168. B. Madoxi Miquel 



Urobacillus Madoxi Miquel : I.e. 

 Morphology. Bacilli 1 .0 : 3.6 ft. 



Gelatin colonies. With urea, small, round, opaque, surrounded by crystals. 

 Gelatin slab. Fail either to grow, or a scanty development of colonies, with 



the formation of crystals. 

 Bouillon. Rendered alkaline, with formation of NH 3 ; a dense turbidity of 



the medium. 

 Habitat. Water and sewage. 



169. B. fissuratus Ravenel 



l.c, 38. 

 Morphology. Bacilli small straight rods, with rounded ends ; occur singly. 



Motility slight. 

 Gelatin colonies. Light yellow, irregular, darker in centre ; look like flakes of 



mineral matter or bits of shell. In 2 days, the surf ace colonies are round, 



irregular ; centre brown : broken and fissured in every direction, 2-3 mm. ; 



gelatin slowly softened. 



