HOLOTRICHA 577 



end rounded; cytostome at anterior end, surrounded by long cilia; 

 thick ectoplasm at anterior end; macro nucleus spherical micro nu- 

 cleus(?) ; concretion vacuole; ciliation uniform; in stomach of cattle. 



B. parva S. (Fig. 274, a). 30-50/x by 20-30/1. 



Genus Blepharoprosthium Bundle. Pyriform, anterior half con- 

 tractile, ciliated; caudal cilia; macronucleus reniform; in the caecum 

 and colon of horse. 



B. pireum B. (Fig. 274, 6). 54-86m by 34-52m. 



Genus Didesmis Fiorentini. Anterior end neck-like, with large 

 cytostome; anterior and posterior ends ciliated; macronucleus ellip- 

 soid ; in the caecum and colon of horse. 



D. quadrata F. (Fig. 274, c). 50-90/i by 33-68m; with a deep dorsal 

 groove. 



Genus Blepharosphaera Bundle. Spherical or ellipsoidal; ciliation 

 uniform except in posterior region; caudal cilia; in the caecum and 

 colon of horse. 



B. intestinalis B. (Fig. 274, d). 38-74/4 in diameter. 



Genus Blepharoconus Gassovsky. Oval; small cytostome; cilia on 

 anterior 1/3-1/2; caudal cilia; macronucleus ovoid; 3 contractile 

 vacuoles; cytopharynx with rods; in the colon of horse. 



B. cervicalis Hsiung (Fig. 274, e). 56-83m by 48-70)u; Iowa. 



Genus Bundleia da Cunha and Muniz. Ellipsoid; cytostome small; 

 cilia at anterior and posterior ends, posterior cilia much less numer- 

 ous; in the caecum and colon of horse. 



B. postciliata (Bundle) (Fig. 274,/). 30-56m by 17-32^. 



Genus Polymorpha Dogiel. Flask-shaped; ciliation on anterior re- 

 gion, a few caudal cilia; macronucleus disc-shaped; contractile vacu- 

 ole terminal; in the caecum and colon of horse. 



P. ampulla D. (Fig. 275, a). 22-36/x by 13-21/z. 



Genus Holophryoides Gassovsky. Oval, with comparatively large 

 cytostome at anterior end; ciliation uniform; macronucleus small, 

 ellipsoid; contractile vacuole subterminal; in the colon and caecum 

 of horse. 



H. ovalis (Fiorentini) (Fig. 275, h). 95-140^ by 65-90/x. 



Genus Blepharozoum Gassovsky. Ellipsoid, wdth attenuated pos- 

 terior end; ciliation uniform; cytostome near anterior tip; 2 con- 

 tractile vacuoles; macronucleus small, reniform; in caecum of horse. 



B. zonatum G. (Fig. 274, g). 230-245/1 by 115-122/1. 



Genus Prorodonopsis Gassovsky. Pyriform; ciliation uniform; 3 

 contractile vacuoles; macronucleus sausage-shaped; in the colon of 

 horse. 



P. coli G. (Fig. 275, c). 55-67/1 by 38-45m. 



