108 BACTERIOLOGY 



88. M. carneus Zimmerman 



Bak. Nutz u. Trinkwasser, Chemnitz, 1890. 



Morphology. Cocci medium-sized, 0.8 /A; in clumps. At 3O-33 C., but 



slight growth. 

 Gelatin colonies. Deep: small, grayish white. Surface: round, slightly raised, 



grayish light red ; microscopically, edges entire, homogeneous, grayish 



red ; later a darker centre, with lighter concentric zones. 

 Gelatin stab. Growth in depth fine, white, granular ; on the surface, growth 



round-irregular, thin, light red. 



Agar slant. Growth deep flesh-red, with a play of violet. 

 Potato. Growth spreading, color of red lead, glistening, becoming dull. 

 Habitat. Water. 



89. M. cerasinus Eisenberg 



Micrococcus . . . List: Untersuch. gesunden Schafes vorkommenden Pilze, Inaug. 



Diss. Leipzig, 1885, 17. 

 M. cerasinus-siccus Eisenberg: Bak. Diag., 1891, 34. 



Morphology. Cocci very small, 0.2-0.3 ^; occur singly and in twos. Grow 



best at 37 C. 

 Agar stab. No growth in depth ; on the surface, growth dry, dull, spreading, 



cherry-red. 

 Potato. Growth at 37 C., dry, spreading, red. Pigment insoluble in water, 



alcohol, and ether ; not affected by acids and alkalies. 

 Habitat. Water. 



CLASS X. DISTINCTLY CHROMOGENIC. PIGMENT BLUISH BLACK 

 I. Gelatin liquefied. 



90. M. fuscus Adametz. 

 II. Gelatin not liquefied. 



91. M. cyaneus (Schroter) Cohn. 



90. M. fuscus Adametz 



Brauner Coccus Maschek : Bak. Untersuch. Leitmeritzer Trinkwasser, Jahresber. Kom- 



nunal-Oberrealschule, Leitmeritz, 1887, 60. 

 M. fuscus Adametz : Die Bak. Nutz u. Trinkwasser, 1888. 



Morphology. Cocci, elliptical forms. 



Gelatin colonies. Round ; microscopically, light brown blackish, with fine 

 clefts. 



