PKRITRICHA 



Fig. 362. a, Glossatella tintinnabidum , X610 (Penard); b, Ellobiophrya 

 donacis, X900 (Chatton and Lwoff); c, Epistylis plicatilis, X200 (Stein); 

 d, e, E. cambari (Kellicott) (d, X140; e, X340); f, E. niagarae, X150 

 (Bishop and Jahn); g, Rhabdostyla vernalis, X320 (Stokes); h, Opistho- 

 styla annulata, X440 (Stokes); i, Campanella umbellaria, X180 (Schro- 

 der) ; j, Pyxidium vernale, X240 (Stokes) ; k, P. urceolatum, X 140 (Stokes) ; 

 1, Opercularia stenostoma, X140 (Udekem); m, 0. plicatilis, X40 (Stokes); 

 n, Operculariella parasitica, X245 (Stammer). 



Family 4 Epistylidae Kent 



Genus Epistylis Ehrenberg. Inverted bell-form; individuals usually 

 on dichotomous non-contractile stalk, forming large colonies; at- 

 tached to fresh or salt water animals. Numerous species (Nenninger, 

 1948). 



E. -plicatilis E. (Fig. 362, c). 110-162ju long (Nenninger); colony 

 often up to 3 mm. high; in fresh water. 



