402 HANDBOOK OF PROTOZOOLOGY 



Dendrosomides paguri Collin (Fig. 171, f). Length about 

 200 to 300 microns; vermicular individuals measure 350 mi- 

 crons in length. Attached to the hermit crabs, Eupagurus 

 excavatus and E. cuanensis. 



Genus Rhabdophrya Chatton and Collin, Body cylindrical 

 or rod-shaped with a short peduncle. Not branched. Tentacles 

 distributed over the entire body surface. The macronucleus 

 ellipsoidal and the micronucleus small. Two or three contrac- 

 tile vacuoles. 



Rhabdophrya trimorpha Chatton and Collin (Fig. 172, a). 



Family 2 Ophryodendridae Stein 



Genus Ophryodendron Claparede and Lachmann. With a 

 retractile proboscis which bears suctorial tentacles. Several 

 species; attached to Crustacea, Annelida, etc. 



Ophryodendron porcellanum Kent (Fig. 172, b). Attached to 

 Crustacea, especially Porcellana platycheles. 



Family 3 Dendrocometidae Stein 



Genus Dendrocometes Stein. The arms are branched and 

 each branch terminates in a sucker. 



Dendrocometes paradoxus Stein (Fig. 172, c). Fresh water. 

 On amphipods. Body about 85 microns in diameter. 



Genus Stylocometes Stein. Each of the arms which are 

 not branched, terminates in a sucker. 



Stylocometes digitatus Stein. 



Family 4 Podophryidae Biitschli 



Genus Podophrya Ehrenberg. Body subspherical, normally 

 with a rigid stalk. Suctorial tentacles in fascicles or distributed 

 over the entire body surface. Encystment common. Specific 

 identification is often difficult. Several species. 



Podophrya fixa (Miiller) (Fig. 172, d, e). In fresh water 

 among vegetation. 



Podophrya gracilis Calkins (Fig. 172, /). Stalk long and 

 filiform, not rigid. One or two contractile vacuoles. A single 

 nucleus near the attachment of the stalk. Body 8 microns in 

 diameter; stalk 40 microns long. Rare. Salt water. 



Genus Sphaerophrya Claparede and Lachmann. Body 



