THE CLASSIFICATION OF BACTERIA 165 



in. Bact. Fischeri (Dyar) 



B.fisckeri Dyar : I.e., 370. 



Morphology . Bacilli 0.5-0.6 : 0.6-1 .2 /u. ; 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 fi ; 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, 1890. Dyar: Lc. 



Morphology. Bacilli 0.8:0.9-1.3 /1; occur singly in pairs and short chains. 

 Optimum temperature 30 C. 



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

 in 8 days, convex, 1 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. rubidus Eisenberg. See No. 145. 



