COMPARATIVE STUDY OF THE COCCI 75 



other students of the diplococci and streptococci. The 

 chemical constitution of the pigments formed, the power 

 to liberate ammonia from urea, the ability to dissolve 

 starch and many other biochemical properties must be 

 measured and compared before the group of the Coccaceae 

 can be adequately understood. The eleven tests listed 

 above have, however, furnished, as it seems to us, suffi- 

 cient information to warrant the recognition of the most 

 important natural groups. 



