THE CLASSIFICATION OF BACTERIA 107 



Agar slant. Grows more rapidly than on gelatin. 

 Pathogenesis. Negative. 



Habitat. Isolated from salted codfish which was covered with a red pigment 

 and of an offensive odor. 



85. M. lactericeus v. Dobrzyniecki 



Centralblatt f. Bakteriologie, XXI, 1897, 834. 



Morphology. Cocci under i .0 fx, irregularly arranged. Stain by Gram's method. 



Gelatin colonies. Surface : dust-like points, bright rose-colored ; microscopi- 

 cally, round, entire, brownish, granular. 



Agar colonies. As before. 



Gelatin stab. In depth, a slight beaded growth ; on the surface, in 2-3 days, 

 a brick-red growth. 



Agar slant. Growth moist, limited, brick-red. 



Potato. Growth brick-red. 



Pathogenesis. Negative for mice and rabbits. 



Habitat. Isolated from the human mouth. 



86. M. cinnabareus Fltigge 



Die Mikroorganismen, 1886. 



Morphology. Cocci large, round, in twos, threes, and tetrads. 



Gelatin colonies. Feeble growth; in 8 days, colonies 0.5-1.0 mm., raised, 



red, becoming vermilion ; microscopically, light brown, round, transparent 



at their peripheries. 

 Gelatin stab. In depth, a beaded growth ; on the surface, growth raised, 



pink-vermilion. 

 Potato. Scanty growth, vermilion. 

 Habitat. Air and water. 



87. M. Eefersteinii 



Micrococcus of red milk Keferstein: Centralblatt f. Bakteriologie, XXI, 1897, 177. 



Morphology . Cocci in staphlococcus groups. Stain by Gram's method. 

 Gelatin colonies. In 4-6 days, scarcely visible, pale rose-colored, becoming 



larger, round, entire, concentric; microscopically, round, entire, granular. 

 Gelatin stab. In depth, a slight growth ; no pigment ; on the surface, as in 



gelatin colonies. 

 Bouillon. At 37° C. no growth ; in 5-6 days, a slight sediment. 

 Pathogenesis. Mice negative. 

 Habitat. Isolated from red milk. 



