DETERMINATION OF SPECIES. 103 
B. tetani (anaérobic). 
2. Gram’s stain undetermined. 
. cereus. 
. laevis. 
. vermicularis. 
. thalossophilus. 
. intricatus. 
. limophilus. 
. circulans. 
. pseudanthracis. 
. globigii. 
mesentericus. 
. vulgatus. 
. Sporogenies. 
. liodermos. 
. albolactus. 
. butyricus. 
. chauveei (anaérobic). 
. tadiatus (anaérobic). 
. cedematis. 
B. Form a black pigment on gelatin. 
B. aterrimus. 
B. niger. 
II. Spore formation not observed. 
1. Grow on gelatin. Not phosphorescent. 
A. Colonies white. 
(2) Do not liquefy gelatin. 
1. Stain by Gram’s method. 
B. zenkeri. 
B. muripestifer. 
2. Do not stain by Gram’s method. 
B. typhosus. 
lcoMccMccMcoMcvMcomccMccMs McoMerRicoMcomcoMcoes ics ie:) 
