DETERMINATION OF SPECIES. Io! 
Bact. keratomalaciz. 
Bact. felis. 
Bact. pyogenes. 
Bact. welchii (aérogenes capsu- 
latus). 
Bact. bienstockii. 
Bact. laerii. 
Bact. ubiquitum. 
Bact. candicans. 
Bact. phosphorescens. 
Bact. giardi. 
(4) Liquefy gelatin. 
Bact. bovis. 
Bact. vignali. 
Bact. varicosum. 
Bact. buccale. 
B. Colonies yellow. 
(2) Do not liquefy gelatin. 
Bact. erythrogenes. 
Bact. citreum. 
Bact. aurescens. 
(4) Liquefy gelatin. 
Bact. arborescens. 
Bact. aquatile. 
Bact. chlorinum. 
Bact. aureum. 
C. Colonies red. 
Bact. mycoides. 
Bact. pyocinnabareum. 
D. Colonies blue or violet. 
Bact. coeruleum. 
Bact. amethystinum. 
