showed fair motility and about 1% or less of the individuals with 

 flagella. The flagella were usually quite long and in no instance 

 could more than one flagellum be found on one organism. The 

 arrangement of the flagella was nonpolar ( peritrichous ) . In all 

 nonpolar or peritrichously flagellated bacteria there is a much 

 greater proportion of the flagella located at or near the poles of 

 the individuals than one would expect from chance. When dealing 

 with bacteria which have many flagella per individual this is not 

 so obvious as with bacteria having only one or two flagella per 

 individual. An experienced observer may thus mistake nonpolar 

 for polar flagellation. A polar flagellum usually emerges from the 

 cell in line with the long axis of the soma of the bacterium while 

 a nonpolar flagellum usually emerges at right angles to the soma. 

 In C. poinsettiae CP-42 the flagellated individuals were mono- 

 trichous with most flagella located at or near the poles but the 

 majority of the flagella emerged at right angles to the soma, and 

 in a fair number the flagella emerged from the middle of the 

 soma. C. fiacciimfaciens, strains CF-8 and CF-18, were both mo- 

 tile and showed nonpolar (peritrichous) flagellation very similar 

 to C. poinsettiae. These strains were mainly monotrichous but 

 occasionally two flagella were found on one individual. C. fimi, 

 Reuszer strain, was motile though very poorly flagellated. The 

 flagella were nonpolar (peritrichous) in arrangement. As with 

 the phytopathogens the majority of the cells were monotrichous 

 but with this organism a fair number of cells showed two flagella 

 and a rare individual had three flagella. The Koehler strains 

 showed the same flagellar arrangement as the phytopathogens. In 

 these strains individuals with two flagella were fairly common. 



The flagella of C. fimi and the Koehler strains showed a much 

 greater wavelength than the flagella of the phytopathogens, as 

 indicated in Table VI and also obvious from the illustrations ( Fig. 

 35). Of some significance perhaps is the difference in wave- 

 lengths of the two strains of C. flaccumfaciens. These differences 

 are statistically significant. Strain CF-18 of C. fiacciimfaciens 

 produced acid in inulin and raffinose while strain CF-8 did not. 



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