:24 8 BACTERIOLOGY 



Milk. Coagulated. Nitrates reduced. 



Agar slant. Growth thin, translucent. Lactose litmus red, becoming blue. 



Habitat. Isolated from silk larvae of Clisiocampa fragilis. 



1 1 8. B. dendriticus Lustig 



Diag. Bak. des Wassers, 1893, 99. 



Morphology. Bacilli 0.5-0.8 : 0.8-2.0 //,. 



Gelatin colonies. Large, raised, white, moist, glistening, with 8-10 branches: 



liquefied very slowly. 

 Gelatin stab. In depth, growth white, beaded ; on the surface, a semispherical 



bead. 



Agar slant. Growth 4 a thin, iridescent layer. 



Bouillon. A membrane adhering strongly to the walls of the tube. 

 Potato. Growth white, moist. 

 Habitat. Water. 



-4. 

 g* 



CLASS VI. WITH ENDOSPORES. AEROBIC AND FACULTATIVE ANAE- 

 ROBIC. COLONIES ON GELATIN PLATES BECOMING AMEBOID, 

 ETC. GELATIN NOT LIQUEFIED. 



I. Little tendency to grow in the depth of the gelatin, especially in gelatin 

 stab cultures. 



119. B. Zopfi (Kurth). 



1 20. B. Zenkeri (Hauser). 



II. Decided growth along the entire length of ,the needle in gelatin stat 

 cultures. 



A. Growth on potato very slow and scanty, light, becoming yellowish 



never brownish. 



121. B. arbor escens Ravenel. 



B. Potato growth brownish, abundant ; strongly pathogenic for mice am 



rabbits. 

 IM. B. let alis (Babes). 



119. B. Zopfi (Kurth) 

 Bact. Zopfi Kurth : Ber. d. Deutsch. Bot. Gesellschaft, February, 1883. 



Morphology. Bacilli like B. mirabilis. 



Gelatin colonies. Colonies generally grow just beneath the surface, as brand 

 ing zob'glcea, radiate and filamentous forms. 



