CLASSIFICATION OF THE COLON-CLOACAE GROUP 



259 



correlated characters is no longer feasible. These groups are 

 regarded as species and to each is assigned, as far as possible, the 

 name of the MacConkey variety which it most resembles. 



TABLE 1 

 Showing correlation of characters among 151 strains of the Aerogenes-cloacae group 



* Nine strains not tested in inulin. 



THE AEROGENES-CLOACAE GROUP 



In the B. aerogenes-B. cloacae group are included all strains 

 which gave the Voges-Proskauer reaction — (practically always 

 alkaline to methyl-red) and 10 cultures which fermented starch 

 with gas formation but did not react typically for the Voges- 

 Proskauer nor methyl-red tests. There are 151 organisms in the 

 group, 9 of which were obtained from sewage and the rest, 142, 

 from soil. 



