THE CLASSIFICATION OF BACTERIA 23 1 



80. B. delictatulus Jordan. 



Evaporation more rapid than the growth and liquefaction of 

 the gelatin in stab cultures ; funnel partly empty. 



81. B. circulans Jordan. 

 Milk not coagulated. 



82. B. putidus. 



83. B. albus-putidus . 



d. Gas produced in ordinary gelatin or bouillon. 



* Grow at 37° and more or less pathogenic. 



84. B. tachyctonus (Fischer). 



85. B. dubius Kruse. 



** Do not grow at 37°, water bacteria. 



86. B. gasoformans Eisenberg. 

 2. Gelatin liquefied very slowly. 



a. Gas generated in glucose bouillon. 



* Milk coagulated. 



87. B. Kralii Dyar. 



88. B. lactis. 



89. B. tartaricus Grimbert-Fiquet. 

 ** No growth in milk (?). 



90. B. halophilus Russell. 



b. No gas generated in glucose bouillon. 



91. B. nitrificans Burri-Stutzer. 



c. Gas production in glucose bouillon not stated. 

 * Grow on potato. 



Rods scarcely longer than broad, thick ovals. 



92. B. guttatus Zimmerman. 



Rods several times longer than broad. 



93. B. inunctus. 



** Do not grow on potato. 



Evaporation equals or excels the evaporation of the gelatin, 

 causing cavities in the latter. 



94. B. litoralis Jordan. 



Liquefaction equals or excels the evaporation of the gelatin. 



95. B. superficialis Jordan. 



B. Colonies on gelatin with filamentous borders or radiate. 



B. Devorans Group. 

 I . Grow well upon potato. 



a. Margins of gelatin colonies fibrillous-floccose. 



* Growth on agar dry, dull, tough, becoming rough, warty. 



