Fig. 47. a, b, c. Salmonella tijphimurium, Friewer. In a is shown the 

 normal and in b the curly type of flagella. The curly flagella of S. typhimiirium 

 seem to have somewhat limited stabihty and pure curly cultures have shown 

 a high rate of dissociation to the normal type. In c is shown a rare phenom- 

 enon in Salmonella: a flagellum with the proximal part curly and the distal part 

 normal. 



d. S. typhosa, Watson. Normal peritrichous flagella. Variants with curly 

 flagella are also found in this species. 



e, f. S. Wichita, Fulton 3216. In e is shown the normal variant and in f the 

 curly variant. These variants have remained stable for years as laboratory 

 broth cultures. The curly variant is only feebly motile with only wiggling and 

 turning movements. 



g. S. Virginia, Fulton 189. Normal peritrichous flagella on a faintly stained 

 soma. 



h. S. enteritidis, Fulton. Normal peritrichous flagella. 



i. S. derby, Fulton. Normal peritrichous flagella. 



j, k. S.anatum, Fulton. Typical normal (j) and curly (k) variants of this 

 species. 



1. S. arizona, Fulton. Normal peritrichous flagella. 



114 



