386 



PROTOZOOLOGY 



Fig. 176. a, Rhynchocystis pilosa, x200 (Hesse); b, c, R. porrecta: 

 b, Xl70 (Hesse), c, spore, X1330 (Troisi); d, e, Zygocystis wenrichi 

 (d, X45; e, X450) (Troisi); f, Pleurocystis cuenoti, Xl90 (Hesse); 

 g, h, Aikinetocystis singularis (h, X320) (Gates); i-k, Stomatophora 

 coronata (i, j, X430; k, X870) (Hesse); 1, Astrocystella lobosa, Xl20 

 (Cognetti); m, Craterocystis papua, X Q5 {Cognetii);n, Choanocystella 

 tentaculata, X570 (Cognetti); o, Choanocystoides costaricensis, X470 

 (Cognetti). 



Pheretima wendessiana (New Guinea); trophozoites about 360- 

 390/x in diameter. 



Genus Choanocystella {Choanocystis Cognetti). Trophozoites 

 soHtary ; rounded or ovate ; anterior end with a mobile sucker and 

 a tentacle bearing cytoplasmic hairs; myonemes. One species. 



C. tentaculata C. (Fig. 176, n). In seminal vesicles of Pheretima 

 heaufortii (New Guinea); trophozoites 50/x by 36m. 



