232 BACTERIOLOGY 



96. B. hyalinus Jordan. 



* Growth on agar thin, smooth, glistening. 



97. B. ////*>- -Frankland. 

 b. Gelatin colonies rosulate. 



98. B. radiatus. 



99. B. reticularis Jordan. 

 2. Little or no growth on potato. 



a. Gelatin stab cultures becoming an empty funnel from the evapora- 



tion of the slowly liquefying gelatin ; rods short. 



100. B. devorans Zimmerman. 



b. Gelatin stab cultures not characterized as before; rods long 



and slender. 



10 1. B. aquatilis Frankland. 



C. Colonies on gelatin erose-lobed, coli-like. B. Diffusus Group. 



1. Grow on potato. 



a. Potato growth grayish to yellowish. 



102. B. diffusus Frankland. 



b. Potato growth yellowish brown ; characters like B. coli. 



103. B. sulcatus Kruse. 



2. No growth on potato. 



104. B. Havaniensis Sternberg. 



D. Colonies on gelatin irregular fragmentary. 



105. B. leporis. 



II. Grow poorly on ordinary nutrient gelatin unless urea is added. 



106. B. Madoxi (Miquel). 



70. B. cloacae Jordan 



Report of the Mass. State Board of Health, 1890, 836. 



Morphology. Bacilli 0.7-1 .0 : 0.8-1 .9 /*. Grow at 37 . 



Gelatin colonies. The deep colonies are round and yellowish ; the surface 



colonies are thin, bluish, entire erose, with a dark centre and a clear 



outer zone ; liquefaction crateriform. 

 Gelatin stab. Liquefaction napiform. 

 Bouillon. Turbid, with a slight membrane. 

 Agar slant. Growth porcelain-white. 

 Potato. Growth yellowish. 



Milk. Acid, t^t- = - . 

 CO, 3 



