408 HANDBOOK OF PROTOZOOLOGY 



Family 6 Discophryidae Collin 



Genus Discophrya Lachmann. Body triangular to ellip- 

 soidal. Attached with a short stalk. Tentacles fasciculated or 

 distributed. 



Discophrya elongata (Claparede and Lachmann) (Fig. 175, 

 a). Attached to the shell of Vivipara contecta. 



Genus Thaumatophrya Collin. Tentacles numerous and 

 each tapers toward the free end. 



Thaumatophrya trold (Claparede and Lachmann) (Fig. 175, 

 h). Salt water. Body diameter about 70 microns. 



Genus Rhynchophrya Collin. Body oblong, bilaterally 

 symmetrical. A short stalk. One main tentacle and a few 

 secondary tentacles. 



Rhynchophrya palpans Collin (Fig. 175, c). Body 85 mi- 

 crons long by 50 microns broad; tentacles 10 to 200 microns; 

 style 20 microns by 10 microns. 



Genus Choanophrya Hartog. Body spheroidal with a stalk. 

 Tentacles expansible at their distal ends to engulf voluminous 

 food particles. 



Choanophrya infundibulifera (Hartog) (Fig. 175, d). 



Genus Rhyncheta Zenker. Protoplasmic body is attached 

 directly to an aquatic animal. With a long mobile tentacle bear- 

 ing a sucker at its end. 



Rhyncheta cyclopnm Zenker (Fig. 175, e, f). On species of 

 Cyclops. When extended the body measures about 170 microns 

 long. 



Family 7 Ephelotidae Sand 



Genus Ephelota Wright. No test; with or without stalk. 

 Ectoparasitic on hydroids. 



Ephelota coronata Wright (Fig. 175, g). Salt water. On 

 hydroids, algae, bryozoans, etc. Body 90 to 200 microns long. 



Ephelota sessilis Collin. Attached to the ascidian, Pyrosoma 

 elegans. 



Genus Podocyathus Kent. Conspicuous test and stalk. 

 Salt water. 



Podocyathus diadema Kent (Fig. 175, h). Salt water. Lorica 

 about 42 microns long. 



