316 



KOFOID AND SWEZY. 



Figure E Nine successive stages in the splitting of the chromatic margi- 

 nal filament of the undulating membrane in Trichomonas migusia X 15UU 

 Figures 1-5 show the progress of the splitting from the blepharoplast to the 

 pomt of emergence of the posterior flagellum and 6-10 the splitting of this 

 exposed part of the organelle. 



