NORMAL 

 amplitude 



Fig. 1. Illustration of the way that wavelength and amplitude are defined. 

 From E. Leifson, S. R. Carhart, and M. Fulton,). Bacterial. 69, 73-82 (1955). 



more flagella at one or both poles. The base of the flagella usually 

 parallel to the long axis of the soma. 



Subpolar, (a) Monotrichous: Predominantly a single flagellum 

 near the pole with the base of the flagellum usually at a right angle 

 to the long axis of the soma, (b) Multitrichous: Several flagella 

 near the pole with the base of the flagella usually at a right angle 

 to the long axis of the soma. 



Lateral, (a) Monotrichous: A single flagellum predominantly 

 from the middle half of the soma, (b) Multitrichous: Several 

 flagella as a tuft predominantly from the middle half of the soma. 



Peritrichous: Flagella seemingly haphazardly arranged on the 

 soma, either single or multiple. 



Mixed: Two or more flagella of distinctly different appearance 

 in different locations. 



The subpolar arrangement is rare. The monotrichous type has 

 been seen mainly in Rhizobiutn, the multitrichous type only in 



