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Figure 14. Variant IX-b. Five-day-old colony on liver infusion agar. Culture subjected 

 to frequent transfer. X 11 diameters. (See Table 4.) 



Figure 15. Variant IX-b. Colony type produced after passage through natural host. Liver 

 infusion agar. Six days old. X 11 diameters. (See Table 4 and page 38.) 



Figure 16. Variant IX-b. Slight variation in colony types. Liver infusion agar. 48 hours 

 old. Culture maintained in whole fresh eggs. X 11 diameters. (See Table 4 and page 34.) 



