576 



PROTOZOOLOGY 



differentiated into 2 areas, a ventral area consisting of close-set rows 

 and a dorso-lateral area consisting of 7 rows; cytostome circular or 

 slightly oval, at anterior tip; cytopharynx long, narrow; without 

 contractile vacuole. One species. 



P. myae K. and B. (Fig. 273, h). 40-100m long; 7 rows of long cilia 

 on dorso-lateral surfaces, 8 rows of shorter cilia on ventral surface; 

 cytopharynx half body length; in pericardial cavity and siphon of 

 Mya arenaria; San Francisco Bay. 





Fig. 274. a, Butschlia parva, X670 (Schuberg); b, Blepharoprosthiiun 

 pireum, X470 (Hsiung); c, Didesmis quadrata, X270 (Hsiung); d, 

 Blepharosphaera intestinalis, X600 (Hsiung); e, Blepharocomis cervicalis, 

 X360 (Hsiung); f, Bundleia postciliata, X530 (Hsiung); g, Blepharozoum 

 zonatum, X200 (Gassovsky). 



Family 7 Biitschliidae Poche 



This family includes species that are intestinal parasites of mam- 

 mals; circular cytostome at anterior end, cytopyge usually located 

 at posterior end; ciliation uniform or in a few zones; with refractile 

 concrement vacuole (Fig. 30, d) in anterior portion; one or more con- 

 tractile vacuoles. 



Genus Butschlia Schuberg. Ovoid, anterior end truncate, posterior 



