THE CLASSIFICATION OF BACTERIA 53 



ff Stained by Gram's method. B. MURIPESTIFER GROUP. 

 ** Gelatin liquefied. 



f Gas generated in glucose bouillon. B. CLOACA GROUP. 

 ff No gas generated in glucose bouillon. Include a large num- 

 ber of bacteria not sufficiently described to arrange in 

 groups. 



b. Gelatin colonies ameboid, cochleate, or otherwise irregular. 

 * Gelatin liquefied. PROTEUS VULGARIS GROUP. 

 ** Gelatin not liquefied. B. ZOPFI GROUP. 

 31. Produce endospores. 



A. Aerobic and facultative anaerobic. 



1. Rods not swollen at sporulation. 



a. Gelatin liquefied. 



* Liquefaction of the gelatin takes place slowly. Ferment urea, 

 with strong production of ammonia. 



URO-BACILLUS GROUP OF MIQUEL. 

 ** Gelatin liquefied rather quickly, 

 f Potato cultures rugose. POTATO BACILLUS GROUP. 

 ft Potato cultures not distinctly rugose. B. SUBTILIS GROUP. 



b. Gelatin not liquefied. B. SOLI GROUP. 



2. Rods spindle-shaped at sporulation. B. LICHENIFORMIS GROUP. 



3. Rods clavate at sporulation. B. SUBLANATUS GROUP. 



B. Obligate anaerobic. 



1. Rods not swollen at sporulation. MALIGNANT CEDEMA GROUP. 



2. Rods spindle-shaped at sporulation. CLOSTRIDIUM GROUP. 



3. Rods clavate-capitate at sporulation. TETANUS GROUP. 



Pseudomonas Migula 



Cells colorless, without a red-colored plasma and without sulphur granules. 

 A. Grow in ordinary culture media. 

 i. Without endospores. 



a. Aerobic and facultative anaerobic. 

 * Without pigment. 

 f Gelatin not liquefied. 



Gas generated in glucose bouillon. 



PS. MONADIFORMIS GROUP. 



No gas generated in glucose bouillon. 



PS. AMBIGUA GROUP. 



