THE FLAGELLATA 193 



there are several they contract in succession. The reservoir 

 into which they discharge is in connection with the hinder end 



13 



C. 



2? 



Fig. 41. 



Mitosis in Euglena. A, elongation of the nucleocentrosome, radial arrangement of the 

 chromosomes. B, further elongation of nucleocentrosome ; pennate arrangement 

 of chromosomes. C, chromosomes arranged in a ring round the dumbbell-shaped 

 nucleocentrosome. D and E, the chromosomes split and their halves travel in 

 opposite directions. f t final stage of mitosis. G, reconstitution of the daughter 

 nuclei. (After Keuten.) 



of the so-called gullet, and slowly empties its contents into it. 

 Euglena viridis^ if kept sufficiently long under observation, 



