708 



PROTOZOOLOGY 



Genus Choanophrya Hartog. Spheroidal to oval; stalked; 10-12 

 tentacles; tubular, expansible at distal end to engulf voluminous food 

 particles; macronucleus oval to spherical; a micronucleus; fresh wa- 

 ter. One species. 



C. infundihulifera H. (Fig. 334, a). 65^ by 60^; fully extended ten- 

 tacles 200m long; on Cyclops ornatus. 



Fig. 334. a, Choanophrya inftmdihdifera, feeding on disintegrating 

 part of a Cyclops, X400 (Collin); b, c, Rhyncheta cyclopurn (b, XlOO; 

 c, end of tentacle, X400) (Zenker); d, Ephelota gemmipara, X200 (Hert- 

 wig); e, E. coronata, Xl40 (Kent); f, E. plana, front view, with two at- 

 tached Ophryocephalus, X35 (Wailes); g, Podocyathus diadema, X200 

 (Kent). 



Genus Rh3mcheta Zenker. Protoplasmic body attached directly to 

 an aquatic animal; with a long mobile tentacle bearing a sucker at its 

 end. 



R. cyclopum Z. (Fig. 334, b, c). About 170/i long; on Cyclops. 



