VARIETIES OF COLON BACILLJ 



191 



names. The principal types of this classification are 

 indicated in the table below: 



MAcCONKEY'S CLASSIFICATION OF THE COLON GROUP 



(MACCONKEY, 



In this country the MacConkey classification was 

 first adopted by Bergey and Deehan (1908). These 

 workers used 8 diagnostic characters, motility, indol 

 production, liquefaction of gelatin, the Voges-Pros- 

 kauer reaction, and the fermentation of saccharose, 

 dulcite, adonite and inulin. They tabulated 256 different 

 combinations of these 8 characters and in the examina- 



