542 



PROTOZOOLOGY 

 d 



Fig. 248. a, Entorhipidium echini, X270 (Lynch); b, Entodiscus 

 indomitus, X380 (Madsen); c, E. borealis, X380 (Powers); d, Biggaria 

 bermudense, X380 (Powers); e, B. echinometris, X380 (Powers); 

 f, Anophrys elongata, X390 (Powers); g, A. aglycus, X390 (Powers). 



a cross-groove from preoral region; cytopharynx inconspicuous; 

 trichocysts; macronucleus oval to sausage-form; 1 to several 

 micronuclei; several (excretory) vacuoles left-ventral; in intestine 

 of the starfish, Strongylocentrotus purpuratus. Four species. 



E. echini L. (Fig. 248, a). About 253)U by 125/1; Cahfornia. 



Genus Entodiscus Madsen. Broadly or narrowly lancet-hke, 

 without narrowed posterior portion; cytostome small on left 

 narrow side, about 2/5 the body length from anterior end; without 

 trichocysts; macronucleus central, with a micronucleus; con- 



