698 



PROTOZOOLOGY 



round; 1-2 contractile vacuoles; about 50/i in diameter; in fresh 

 water. _, ., _ , 



t amily 2 Ophryodendridae Stein 



Genus Ophryodendron Claparede and Lachmann. With one long 

 b 



Fig. 328. a, Rhabdophrya trimorpha, X650 (Collin); b, Staurophrya 

 elegans, X300 (Zacharias); c, Ophryodendron porcellanum, X330 (CoHin); 

 d, 0. helgicum, X270 (Fraipont); e, Dendrocometes paradoxus, X270 

 (Wrzesnowski) ; f, g, Podophrya fixa (f, X600 (Wales); g, X330 (Col- 

 lin)); h, P. gracilis, XlOOO (Collin); i, P. elongata, X240 (Wailes). 



or 3-6 shorter retractile processes, bearing suctorial tentacles; on 

 Crustacea, Annelida, etc.; salt water. Several species. 



