THE EUGLENOIDINA OF OHIO 425 



The genus has not been found in America and if later dis- 

 covered will probably be noted from brackish water ditches near 

 the coast. 



TABLE OF SPECIES. 



Ai Length 18-20m.; diameter not greatest posteriorly; flagellum 



not 'onger than body . . . . . . 1. C. mobilis 



A- Length 7-8m.; diameter greatest posteriorly; flagellum 3-4 times 



length of body . . . . . . . 2. C. parva 



1. C. mobilis Mass. (Fig. 9, PI. XXVI). 



Oval approaching cylindrical ; rigid ; cytopharynx opening an- 

 teriorly and ventral in position ; nucleus right, posterior part of 

 cell; primary flagellum absent; secondary flagellum IV2 times 

 length of body. 



L. 18-20/x. D. 12-13/1. 



Distribution, Belgium. Among algae in fresh water ditch on 

 coast near Nieuport. 



2. C. parva Schout. (Fig. 10, PI. XXVI). 



Oval, widest posteriorly, rigid; cytopharynx opening ante- 

 riorly and ventrally; primary flagellum absent; secondary flagel- 

 lum 3 times length of body. 



L. 9-10/1. D. 7-8/.. 



Distribution, Belgium. Among algae in fresh water ditch 

 coast near Nieuport. 



15. Gen. DINEMA Perty. 



Elongately oval, rounded at both ends, slowly metabolic; 

 ectoplasm with granules arranged spirally; two flagella, the an- 

 terior about as long as the body and not attenuate at end; the 

 posterior about twice as long as body and decidedly attenuate at 

 end; rod-like organ present; pellicula striate spirally; principal 

 vacuole with small accessory contractile vacuoles; nucleus large, 

 situated somewhat behind the middle of the body; movement 

 creeping. 



A single species. 



Habitat, fresh water. 



Distribution, cosmopolitan. 



