PLATE 37 
A. —Cultures in + io beef bouillon, 8 days old, showing viscid, persistent, falling 
pellicle in different stages. 
B. —Colonies on 8-day-old whey agar plates. X 2. 
C. —Colonies on beef agar n days old, showing shape. X 2. 
D. —Whey agar slant 3 days old, showing clear area and alkaline halo. 
