254 BACTERIOLOGY 



Bouillon. A membrane. 



Potato. Growth thick, spreading, glistening, ochreous — brown. 



Pepton rosolic acid solution. Unchanged. 



Habitat. Air. 



132. B. gamma Dyar: I.e. 



Morphology. Bacilli 0.5-0.7: i. 0-1.5 ft,. 



Agar slant. Growth spreading, translucent, ochreous, concentrically marked; 



comes off in pieces under the needle. 

 Bouillon. A thick membrane. 

 Milk. Slowly peptonized. 

 Lactose-litmus. Blue, reduced. 

 Pepton rosolic acid solution. Unchanged. 

 Habitat. Air. 



CLASS VIII. WITHOUT ENDOSPORES. AEROBIC AND FACULTATIVE 

 ANAEROBIC. CHROMOGENIC, PIGMENT YELLOWISH. GELATIN 

 NOT LIQUEFIED. 



I. Gelatin colonies large, spreading. 



A. Chromogenic function weak, pale yellow. 



133. B. subflavus Zimmerman. 



B. Chromogenic function strong, deep or golden yellow. 



1. The gelatin acquires a green fluorescence. 



134. B.fluorescens Zimmerman. 



2. Do not cause a fluorescence of the gelatin. 



135. B. flavus Adaraetz. 

 II. Gelatin colonies aerogenes-like. 



136. B. aurantiacus Frankland. 



137. B. flavescens Frankland. 



138. B. Winkleri. 



133. B. subflavus Zimmerman 



Bak. Trink u. Nutzwasser, 1890, 62. 



B. flavescens Pohl: Centralblatt f. Bakteriol., XI, 1892, 144. 



Morphology. Bacilli 0.8 : i .5-3.0 /a. 



Gelatin colonies. Deep colonies: round, yellowish, white. Surface colonies: 



punctiform, becoming spreading ; borders irregular. 

 Gelatin stab. On the surface, growth thin, yellowish gray. 



