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THE VIBRIO GROUP— 
A. JJicrosjnra comma Schroter, 1886. [Koch’s comma bacillus of Asiatic cholera.] 
B. Microspira MeUhnikovi (Gamaleia, 1888) Migula, 1900. 
C. 3Iicrospira Finkleri Schroter. 
D. Vibrio Denecke. 
E. 3Iicrospira oquatilis (Gunther, 1892) Migula, 1900. 
Pfeifter’s phenomenon. 
Widal reaction. 
Immunity. 
Haft'kine’s prophylactic. 
Viability. 
Disinfection for cholera. 
RELAPSING FEVER. 
