THE CLASSIFICATION OF BACTERIA 165 



III. Bact. Fischeri (Dyar) 



B.fischeri Dyar : l,c., 370. 



Morphology. Bacilli 0.5-0.6 : 0.6-1.2 ft, ; occur singly. 



Gelatin. Liquefied slowly, i.e. after 28 days. On solid media growth yellow- 

 ish, but pigment forms slowly. 



Milk. Coagulated slowly, often not until 28 days. A slight reduction of 

 nitrates. 



Pepton-rosolic acid. Unchanged. 



Litmus milk. Unchanged. 



Habitat. From Krai's laboratory. 



According to Dyar, identical with Photobacterium Fischeri of Beijerinck. 



112. Bact. eta (Dyar) 



B. eta Dyar: I.e., 374. 



Morphology. Bacilli 0.5 : 0.7-1.0 fx, ; occur singly. 

 Gelatin. Liquefied slowly. 

 Milk. Not coagulated. 



Pepton-rosolic acid. Unchanged. Growth on solid media yellow, viscous. 

 -Habitat. Air. 



113. Bact. fulvum (Zim.) 



B.fulvus Zimmerman: Bakt. Nutz u. Trinkwasser, i8go. Dyar: I.e. 



Morphology. Bacilli 0.8 : 0.9-1.3 ^; occur singly in pairs and short chains. 

 Optimum temperature 30° C. 



Gelatin colonies. Deep : round — irregular, yellowish gray, granular. Surface: 

 in 8 days, convex, i mm., reddish yellow. 



Gelatin stab. In depth, a good growth ; on the surface, growth round, con- 

 vex, yellowish. 



Agar slant. Growth yellowish, glistening. 



Potato. Growth abundant, yellowish, glistening. 



Milk. Not coagulated. Nitrates not reduced to nitrites. 



Litmus milk. Reddened (Dyar) . 



-Habitat. Water, etc. 



114. Bact. rubidum (Eisenberg) 



B. ruiidus Eisenberg. See No. 145. 



