156 BACTERIOLOGY 



** Potato growth scarcely visible. Grow well at 20 C. 

 t Gas generated in nutrient gelatin and glucose bouillon. 

 99. Bact. aromaticum (Pammel). 

 ft No gas in nutrient gelatin (?). 



100. Bact. nubilutn (Frankland) Lehmann-Neumann. 



101. Bact. methylicum (Loew.). 



*** On potato, raised dry grayish colonies. Bacilli show chro- 

 matic granules in the interior of the rods. 



102. Bact. Trambusti Kruse. 



b. Potato growth yellowish brownish. 



* Gelatin stab cultures show a saccate liquefaction. 



103. Bact. aquaiilis (Zimmerman). 



** Gelatin stab cultures a crateriform liquefaction, becoming 

 stratiform. 



1 04 . Bact. flexHosum (Wright) . 



c. Potato growth pinkish salmon-colored. 



105. Bact. ambiguum Chester. 



d. Color of potato growth not stated 



106. Bact. convolutum (Wright). 

 II. Colonies on gelatin plates amoeboid or proteus-like. 



Bact. radiatum Group. 



107. Bact. radiatum Chester. 



BACT. AMBIGUUM GROUP 



92. Bact. salmonica (Kruse) 



Bacillus der Forellenseuche Emmerich-Weibel : Archiv f. Hygiene, XXI, 1894, 1. 

 B. salmonica Kruse : Fliigge, Die Mikroorganismen, 1896, 322. 



Morphology. Bacilli short rods. Do not grow at 37 C. 



Gelatin colonies. Whitish-gray, becoming brownish, glistening, cholera-like, 

 with rosulate markings. 



Gelatin stab. In depth, beaded colonies, then air bubbles, with slow liquefac- 

 tion, and production of an open canal, mostly air. 



Bouillon. Clear, with a sediment. 



Agar slant. Growth thin, moist, glistening, greenish yellow brownish. 



Potato. No growth. 



Pathogenic to trout by inoculation of cultures. 



Habitat. Isolated from a disease of trout. 



