102 DETERMINATION OF SPECIES. 
2. Do not grow well on gelatin at room- 
temperature. 
Bact. tuberculosis. 
Bact. tuberculosis avium. 
Bact. leprze. 
Bact. syphilidis. 
Bact. smegmatis. 
Bact. mallei. 
Bact. diphtherie. 
Bact. xerosis. 
Bact. pseudodiphtheriticum. 
Bact. vaginee. 
Bact. influenze. 
Bact. pseudoinfluenze. 
2. Genus. Bacillus. 
I. Form spores. 
1. Spores polar. 
B. ramosus. 
2. Spores central or oblique. 
B. subtilis. 
B. megaterium. 
3. Position of spores undetermined. 
A. White or dirty white on gelatin. 
(a) Do not liquefy gelatin. 
B. spermophilinus. 
B. polypiformis. 
B. muscoides. 
(4) Liquefy gelatin. 
I. Stain by Gram’s method. 
B. mycoides. 
B. gracilis. 
B. granulosus. 
