220 RELATIONSHIPS OF THE COCCACE^ 



(1901) describes M. luteus as liquefying gelatin, but 

 Frankland and Migula class it as a non-liquefier. Vari- 

 ous strains have no doubt been included in laboratory 

 collections under this name. Adopting the more com- 

 mon definition, Cohn's description may be expanded to 

 serve for the type center of non-liquefying micrococci. 



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. 



A considerable series of names of yellow non-liquefy- 

 ing saprophytic cocci may be considered as synonyms of 

 this species. The following list includes the more im- 

 portant of these: M. butyri (v. Klecki), Migula; M. buty- 

 ricus (v. Klecki), Migula; M. cereus (Passet), Migula; M. 

 citreus, Sternberg; M. commensalis (Turrd), Migula; M. 

 cupuliformis , Migula; M. excavatus, Kern; M . flavovirens , 

 Migula; M. gilvus, Losski; M. granulosus, Kern; M. hel- 

 volus, Henrici; M. Jongii, Chester; M. Lembkei, Migula; 

 M. licheniformis , Kern; M. luridus, Kern; M. ochraceus, 

 Rosenthal; M. orbiculatus, Wright; M. plumosus, Eisen- 

 berg; M. resinaceus, Kern; M. stellatus, Frankland, M. 

 strobiliformis , Migula; M. sub gilvus (Henrici), Migula; 

 M. sulfur eus, Zimmermann; M. tardigradus, Fliigge; 



