640 



PROTOZOOLOGY 



Genus Thaumatophrya Collin. Spherical; long stalk; tentacles 

 distributed, tapering toward distal end; salt water. One species. 



T. trold (Clapardde et Lachmann) (Fig. 290, g). About 75^ in 

 diameter. 



Genus Rhynchophrya Collin. Oblong; bilaterally symmetrical; 

 a short striated stalk; 1 main long and a few shorter tentacles; 

 6-10 contractile vacuoles, each with a canalicule leading to out- 

 side; fresh water. One species. 



Fig. 291. a, Choanophrya infundihulifera, feeding on disintegrating 

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

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

 (Hertwig); e, E. coronata, Xl40 (Kent); f, E. plana, front view, with 

 two attached Ophryocephalus, X35 (Wailes); g, Podocyathtis diadema, 

 X200 (Kent). 



