246 



('. M. WKNYON. 



in shape of the body. At other titnes there is a distinct 

 to-and-fro or lashing movement, but at its maximum it is 

 much less violent tlian that of the long anterior flagellum. 

 'I'he protoplasm of the body may be continued along this 

 posterior flagellum for a considerable distance. On very 

 careful focussing it can be seen that the posterior flagellum 



Text-fig. 3. 



Two amoeboid forms with entangled flagella. 



is attached to one side of the body, and really arises from the 

 insertion of the anterior flagellum. fT This is very well shown 

 in some of the figures, e.g. 3, 5, 9. "When the body is viewed 

 in certain positions it is t-een that ic is distinctly flattened 

 along the line of attachment of the posterior flagellum (fig. 10), 

 and when the posterior flagellum is moving at its maximum 

 rate this flattetied edge of the body shows slight but distinct 

 iiudnlatorv movement, reminding one most strikin^lv of the 



