266 RELATIONSHIPS OF THE COCCACE^ 



B. Pigment white. Gelatin not liquefied. Nitrites not 

 reduced. 



4. M. candicans. 



(C*^<&* , * 

 VII. Cells in packets. Pigment yellow. 



Genus, Sarcina. 

 A. Gelatin liquefied. 



1. Nitrates not reduced. S. flava. 



2. Nitrates reduced. S. citrea. 



\ B. Gelatin not liquefied. 



3. 5. lutea. 



VIII. Cells in irregular groups or packets. Pigment red. 



Genus, Rhodococcus. 



1. Nitrates reduced to nitrites. R. roseus. 



2. Nitrates not reduced. R.fulvus. 



