370 



PROTOZOOLOGY 



Flagellar cords on body surface 



Family S Dinenymphidae (p. 379) 



With cresta Family 9 Devescovinidae (p. 380) 



With undulating membrane. . . .Family 10 Trichomonadidae (p. 385) 



Family 1 Trimastigidae Kent 



Genus Trimastix Kent. Ovate or pyriform; naked; free-swimming; 

 with a laterally produced membranous border; 3 flagella (1 anterior 

 flagellum vibrating, 2 trailing); salt water. Species (Grasse, 1952a). 



T. marina K. (Fig. 154, a). About 18ju long; salt water. 



Fig. 154. a, Trimastix marina, X1250 (Kent); b, Dallingeria drysdali, 

 X2000 (Kent); c, Macromaslix lapsa, X1500 (Stokes). 



T. convexa Grasse (Coelotrichomastix convexa Hollande) (Fig. 167, 

 a). In life 10-22/* by 8-10/x; dorsal side strongly convex, ventral side 

 concave; three free flagella nearly equally long, fourth flagellum 

 borders the undulating membrane, present on the concave side and 

 becomes free beyond the posterior end of body; spherical nucleus 

 voluminous, with a large endosome; free-living and coprozoic (Hol- 

 lande, 1939; Grasse, 1952a). 



Genus Dallingeria Kent. Free-Swimming or attached; with trail- 

 ing flagella; body small; with drawn-out anterior end; fresh water 

 with decomposed organic matter. 



D. drysdali K. (Fig. 154, b). Small; elongate oval; less than 6^ 

 long ; stagnant water. 



Genus Macromastix Stokes. Free-swimming, somewhat like 



