THE CLASSIFICATION OF BACTERIA 105 



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. rubescens. 



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



83. M. coralinvs Centanni. 

 II. Gelatin not liquefied. 



A. Very large cocci, 3.0-5.0 fi 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. lactericeus v. Dobrzyniecki. 



86. M. cinnabarens 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) 



Diplococcm 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. 



