10. Methanomonas 



One culture labeled Pseudomonas methanica was received 

 from J. W. Foster of the University of Texas ( Fig. 12 ) . The organ- 

 isms were stained directly from the original slant. Subcultures on 

 peptone media did not grow. The organism was fairly well flagel- 

 lated with a single polar flagellum of normal curvature. No var- 

 iants were observed. The average flagellar wavelength was 1.77 

 microns with an average amplitude of 0.51 micron. 



1 1 . Protaminohacter 



One strain each of Protaminohacter ruber (NRRL,B-1048) and 

 Protaminohacter alboflavus (NRRL,B-1051) were received from 

 Dr. W. B. Haynes of the Northern Regional Research Laboratory 

 (NRRL), U.S.D.A., Peoria, Illinois. The culture of P. ruher pro- 

 duced reddish colonies on agar, did not acidify any carbohydrate 

 media tested, and was motile (Fig. 13). P. alhofiavus produced 

 a deep yellow pigment on agar, showed no effect on any carbo- 

 hydrate tested, and was nonmotile. Both cultures appeared to be 

 typical. 



Flagellar Characteristics 



P. alhofiavus was atrichous. P. ruher in moist preparation 

 showed a few individuals with rapid linear motion characteristic of 

 polar monotrichous bacteria. Flagella stain showed a few indi- 

 viduals with a single polar flagellum. The bacterial soma did not 

 take the flagella stain to any extent and counterstain was used. 

 The flagellar curvature was uniform, with an average wavelength 

 of 2.01 microns and average amplitude of 0.54 micron. Flagellar 

 variations were not observed. 



34 



