THE CLASSIFICATION OF BACTERIA 163 



2. Gelatin colonies not characterized as above. 



a. Milk coagulated. 



* Litmus milk reddened. 



109. Bact. oxylacticum (Dyar). 

 ** Litmus milk rendered alkaline or unchanged in reaction, 

 f Gelatin liquefied rapidly. 



no. Bact. desidioswn (Wright), 

 ft Gelatin liquefied very slowly. 



111. Bact. Fischeri Dyar. 



b. Milk not coagulated. 



* Litmus milk reddened, rendered acid, 

 f Nitrates reduced to nitrites. 



112. Bact. eta (Dyar). 



tf Nitrates not reduced to nitrites. 



113. Bact. fulvum (Zimmerman). 



** Litmus milk rendered alkaline or unchanged. 



t Agar smear cultures reddish brown, shading to yellowish. 



114. Bact. rubidum (Eisenberg). 



ft Agar smear cultures yellowish orange. 



Gelatin liquefied quickly, i.e. within a few days. 



115. Bact. caudatum (Wright). 



Gelatin liquefied very slowly, i.e. within 2-4 weeks. 



116. Bact. Kralii. 



117. Bact. helvolum (Zimmerman). 



c. Milk coagulation not stated. Growth on liquefied gelatin 



crumpled. 



* Gelatin colonies moruloid. 



118. Bact. plicatum (Zimmerman). 

 ** Gelatin colonies punctiform. 



119. Bact. citreum (Strassman-Stecker). 



B. Growth on potato brownish. 



1. Short, broad bacilli. 



120. Bact. bucallis (Sternberg). 



2. Bacilli minute, slender. 



121. Bact. pseudoconjunctivitidis (Kruse). 



II. Do not grow on potato. 



122. Bact. aris-ntimttissimum (Kruse). 



123. Bact. dormitor (Wright). 



