SUMMARY 259 



broth faintly acid, in lactose broth alkalin or faintly acid. 

 Gelatin slowly liquefied. Nitrates not reduced. 



Species 2. M. citreus (Dyar) Winslow. 



A saprophytic or semi -parasitic coccus, found most 

 commonly in earth, water, and air, frequently also on 

 the surfaces of the animal body. Occurs singly, or in 

 pairs, or irregular groups. Generally decolorizes by Gram. 

 Good to abundant, yellow surface growth. Reaction in 

 dextrose broth faintly acid, in lactose broth alkalin or 

 faintly acid. Gelatin slowly liquefied. Nitrates reduced 

 to nitrites or ammonia. 



Species 3. M. luteus (Cohn) Migula. 



A saprophytic or semi-parasitic coccus, found most 

 commonly in earth, water, and air, frequently also on the 

 surfaces of the animal body. Occurs singly, or in pairs, 

 or irregular groups. Variable reaction to Gram stain. 

 Good to abundant, yellow surface growth. Reaction in 

 dextrose broth faintly acid, in lactose broth alkalin or 

 faintly acid. Gelatin not liquefied. Nitrates not reduced. 



Species 4. M. candicans Fliigge. 



A saprophytic or semi-parasitic coccus, found most 

 commonly in earth, water, and air, frequently also on the 

 surfaces of the animal body. Occurs singly, or in pairs, 

 or irregular groups. Variable reaction to Gram stain. 

 Good to abundant growth, of white color. Fails to form 



