HOLOTRICHA 



527 



Fig. 241. a, b, Cryptopharynx setigerus, X650 (Kirby); c-e, Chilo- 

 donella cucullulus (c, X270 (Stein) ; d, oral region; e, nucleus (Penard)) ; 

 f, C. caudata, XlOOO (Stokes); g, C. fluviatilis, XSOO (Stokes); h, C. 

 cyprini, X670 (Moroff); i, Allosphaerium palustris, XlOOO (Kidder 

 and Summers). 



C. longipharynx Kidder et Summers. 17-21ju (average 19/i) 

 long; cytopharynx long, reaches posterior end; ectocommensal on 

 amphipods, Talorchestia longicornis and Orchestia palustris; 

 Woods Hole. 



C. hyalina K. et S. 40/i (36-47ju) long; ectocommensal on 

 Orchestia agilis; Woods Hole. 



C. rotunda K. et S. 29/i (27-34/i) long; ectocommensal on 

 Orchestia agilis; Woods Hole. 



