22O BACTERIOLOGY. 



in two or three days milk-white colonies. Culti- 

 vated in test-tubes they form a white nail-shaped 

 cultivation. They were isolated from contaminated 

 plate-cultivations, 



Micrococcus fcetidus, Rosenbach. Small 

 oval cocci. Cultivated in agar-agar they develop 

 gas bubbles and a foetid odour. Isolated from 

 carious teeth. Possibly closely allied to, if not 

 identical with, the following. 



Micrococcus crepusculum, Cohn (Monas 

 crepusculum, Ehrenberg. Mikrokokken in fauienden 

 Substraten^ Fliigge). Round or short oval cells, 

 scarcely 2 ^ in diam. ; singly or in zooglcea. 

 They occur in various infusions and putrefying 

 fluids in company with Bacterium lermo. 



Micrococcus cinnabareus, Fliigge. Large 

 cocci occurring in twos, threes, and fours. In 

 plate-cultivations they grow very slowly, forming 

 punctiform colonies, in colour bright red at first, 

 and afterwards reddish-brown. In test-tube culti- 

 vations they form on the surface of the gelatine 

 a heaped-up red-coloured growth. Found con- 

 taminating old cultivations. 



Micrococcus flavus liquefaciens, Fliigge. 

 Cocci, diplococci, and zoogleea. On plate-cultiva- 

 tions they form yellowish colonies, and in test-tubes 

 yellowish beads, which become confluent and 

 rapidly liquefy the gelatine. 



Micrococcus flavus tardigradus, Fliigge. 

 Cocci forming chrome-yellow colonies. Cultivated 



