SUCTORIA 



639 



Fig. 290. a, Pseudogemma pachystyla, X400 (Collin); b, Endo- 

 sphaera engelnianni, X500 (Lynch and Noble); c, Allantosoma intes- 

 linalis, X1050 (Hsiung); d, A. dicorniger, X1300 (Hsiung); e, A. 

 brevicorniger, X1400 (Hsiung); f, Discophrya elongata, X440 (Collin); 

 g, Thaumatophrya trold, X1150 (Claparede and Lachmann); h, Rhyn- 

 chophrya palpans, X440 (Collin). 



in bundles; contractile vacuoles, each with canalicule leading to 

 body surface; mainly fresh water. Several species. 



D. elongata (Claparede et L.) (Fig. 290, /). Cyclindrical; ten- 

 tacles on anterior end and in 2 posterior bundles; stalk striated; 

 about 80/x long; on shell of Pauldina vivipara in fresh water. 



