length as illustrated in Fig. 23a. In C. fiilvus, Reuszer strain 102, 

 the individuals with the short flagellar wavelength were most 

 abundant but otherwise the two strains were morphologically 

 alike. Both strains of C. vulgaris showed the same two types of 

 individuals with the long wavelength type most abundant in 

 Reuszer strain 122. The average flagellar wavelength of the two 

 types was 2.06 microns and 0.84 micron, respectively. 



According to letter communication from Dr. Reuszer, he also 

 had observed two somatic types of individuals in his Cellvibrio 

 cultures. By plating and fishing single colonies he had not suc- 

 ceeded in obtaining stable pure cultures of each somatic tv^pe. 

 The author also plated the cultures and fished a number of typical 

 yellow-brown colonies. The fresh isolates invariably showed only 

 individuals with the short wavelength flagella. Transfers from 

 these isolates showed only individuals with the short wavelength 

 flagella. The long wavelength type was not observed in pure cul- 

 ture and its relationship to the short wavelength type remains un- 

 determined. 



22. Succinovibrio 



One culture of Succinovibrio dextrinosolvens C-85 was obtained 

 from Dr. M. Bryant of the U.S.D.A., Beltsville, Maryland (Fig. 24). 

 This culture was isolated from cow rumen fluid. It was strictlv 

 anaerobic. 



Flagellar Characteristics 



The one culture studied showed a large rod shaped organism 

 with somatic curvature like a vibrio. A few individuals were 

 flagellated with a single polar flagellum of rather long wave- 

 length, averaging 3.2 microns. No variations were observed. 



2 3 . Lachnospira 



A culture of Lachnospira multiparus, D-38, was obtained from 

 Dr. M. Bryant of the U.S.D.A., Beltsville, Maryland (Fig. 25). 

 Flagellar Characteristics 



The flagellation of this organism is very unusual. The individual 

 organisms appear as slightly curved rods with a single flagellum 

 originating from the side, usually near the center. This type of 

 flagellation is designated as lateral monotrichous and is quite rare. 

 The one culture studied labeled Nitrobacter agilis also seemed to 

 have this type of flagellation. The flagellar wavelength is rather 

 long, averaging 3.0 microns. 



58 



