BACTERIOLOGY. 



a darker crimson hue, subsides to the bottom of 

 the tube. In plate-cultivations on nutrient agar- 

 agar, the colonies have a scarlet tint. They are 

 round, ovoid, or spindle-shaped, and have cha- 

 racteristic granular margins. 



Micrococcus crepusculum, Cohn. (Monas 

 crepusculum, Ehrenberg. Mikrokokken in faulenden 

 Substratcn, Fliigge). Round or short oval cells, 

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

 Occurs in various infusions and putrefying fluids 

 in company with Bacterium termo. 



Micrococcus septicus, Cohn. (Microsporon 

 septicum, Klebs). Cells round, about 5 /A in diam. 

 Singly, in chains and masses of zooglcea. They 

 occur on the mucous membrane of the mouth, in 

 catarrhal exudations, on the surface of intestinal 

 and other ulcerations, in the cavity of the in- 

 testines, the secretions of open wounds and ulcers, 

 abscesses and purulent inflammations, the serum 

 of epidemic puerperal fever, and the tissues and 

 vessels in cases of pyaemia and septicaemia (vide 

 Streptococcus pyogenes, etc.). 



Micrococcus endocarditicus, Klebs. Cocci 

 i p, and '5 p, in diam., and chains. They have 

 been observed in masses upon the altered valves 

 and in the detritus of the ulcerations of the 

 endocardium in endocarditis ulcerosa ; as chains also 

 in the muscle of the heart, and forming plugs in 

 the vessels of the heart, spleen, and kidney. 

 Some forms are identical with Staphylococcus pyogenes 



