THE CLASSIFICATION OF BACTERIA IO5 



CLASS IX. DISTINCTLY CHROMOGENIC. PIGMENT REDDISH- 

 PINKISH FLESH-COLORED 

 I. Gelatin liquefied. 



A. Gonococcoid forms. 



81. M. roseus (Bumm). 



B. Cocci in irregular groups. 



1. Grow only at body temperatures, 37 C. 



82. M. rubes cens. 



2. Do not grow at body temperatures, 37 C. 



83. M. coralinus Centanni. 

 [I. Gelatin not liquefied. 



A. Very large cocci, 3.0-5.0 /x in diameter. 



84. M. Dantecii. 



B. Cocci much smaller than in A., and of average size. 



1 . Colonies on gelatin remain very small. 



85. M. lacier iceus v. Dobrzyniecki. 



86. M. cinnabareus Fliigge. 



2. Colonies on gelatin larger than above. 



87. M. Kefersteinii. 



88. M. carneus Zimmerman. 



C. Cocci very small. 



89. M. cerasinus Eisenberg. 



81. M. roseus (Bumm) 



Diplococcus roseus Bumm : Der Mikroorg. der gon. Schleimhauterkrankungen, 



1885, 25. 



Morphology. Like gonococci, 1.0-1.5 //,. 



Gelatin colonies. Surface : slightly elevated, pink ; microscopically granular, 

 irregular. 



Gelatin stab. On the surface an abundant pink growth ; gelatin slowly lique- 

 fied after a long time. 



Habitat. Air. 



82. M. rubescens 



M. roseus, Eisenberg : Bak. Diag., 1891, 408. 



Morphology. Cocci 0.8-1.0 /x, singly and in irregular groups. At 37 C. no 



pigment. 

 Gelatin colonies. In 3-4 days, minute, pink ; liquefaction progresses slowly. 



