THE CLASSIFICATION OF BACTERIA 1 63 



2. Gelatin colonies not characterized as above. 



a. Milk coagulated. 



* Litmus milk reddened. 



109. Sad. oxylacticum (Dyar). 

 ** Litmus milk rendered alkaline or unchanged in reaction, 

 t Gelatin liquefied rapidly. 



no. Bad. desidiosum (Wright), 

 tt Gelatin liquefied very slowly. 



111. Bad. Fischeri Dyar. 



b. Milk not coagulated. 



* Litmus milk reddened, rendered acid, 

 t Nitrates reduced to nitrites. 



112. Bad. eta (Dyar). 



ft Nitrates not reduced to nitrites. 



113. Bad. fulvum (Zimmerman). 



** Litmus milk rendered alkaline or unchanged. 



t Agar smear cultures reddish brown, shading to yellowish. 



114. Bad. rubidu}n (Eisenberg). 



tt Agar smear cultures yellowish — orange. 



§ Gelatin liquefied quickly, i.e. within a few daysi 



115. Bad. caudatum (Wright). 



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



116. Bad. Kralii. 



wj. Bad. helvolum (Zimmerman). 



c. Milk coagulation not stated. Growth on liquefied gelatin 



crumpled. 



* Gelatin colonies moruloid. 



118. Bad. plicatum (Zimmerman). 

 ** Gelatin colonies punctiform. 



119. Bad. citreum (Strassman-Stecker) . 



B. Growth on potato brownish. 



1. Short, broad bacilli. 



120. Bad. bucallis (Sternberg). 



2. Bacilli minute, slender. 



121. Bad. pseudoconjunctivitidis (Kruse). 



II. Do not grow on potato. 



122. Bad. ceris-niinutissimum (Kruse). 



123. Bad. dormitor (Wright). 



