THE CLASSIFICATION OF BACTERIA 1 79 



CLASS VIII. WITHOUT ENDOSPORES; AEROBIC AND FACULTATIVE 

 ANAEROBIC; PRODUCE PIGMENT ON GELATIN AND AGAR; 

 PIGMENT OF OTHER COLORS THAN YELLOW AND RED. 



I. Pigment gray to brown. 

 A. Gelatin liquefied. 



153. Bad. glaucum (Maschek). 



154. Bad. fuscescens (Migula). 



II. Pigment violet to blue on gelatin or agar. 

 A. Gelatin liquefied. 



1. Growth on potato dirty white to olive-green. 



155. Bad. amethystinum (Eisenberg). 



156. Bad. indigonaceum Classen. 

 III. Pigment greenish. 



157. Bad. allii (Griffiths). 



153. Bact. glaucum (Maschek) 



B. glaucus Maschek ; Adametz : I.e., 1888. 



Morphology. Bacilli as slender rods. 



Gelatin colonies. Round, entire ; centre gray, edge brown, and radially folded, 



becoming slowly liquefied. 

 Gelatin stab. Gray bacterial masses. 

 Agar slant and potato. Growth gray. 

 Habitat. Water. 



154. Bact. fuscescens (Migula) 



B. fuscus-limbatus Scheibenzucker : Allgemeine Wiener Med. Zeitung, 1889, 171. 

 B. fuscescens Migula: System der Bakterien, 1900. 



Morphology. Bacilli short. 



Gelatin colonies. As brownish clumps. 



Gelatin stab. Along line of stab, growth uniform, with short outgrowths. 



Surface growth spreading slightly ; gelatin near stab slightly brownish. 

 Agar slant. The medium around the growth stained brown. 

 Potato. Growth brownish. 

 Habitat. Isolated from decayed eggs. 



155. Bact. amethystinum Eisenberg: I.e. 



Morphology. Bacilli 0.5 : 1. 0-1.5 /jl. Strong development at 37 . 

 Gelatin colonies. Like typhoid, becoming dark violet, metallic, crumpled. 



