364 



THE CILIA TES 



cytopyge is on a knob at the posterior end. 

 The macronucleus is a more or less thick, 

 distinctly granular disc, and is not con- 

 stant in position. The concretion vacuole 

 is large and is near the surface in the 

 anterior third of the body. There is 

 usually a small, posterior contractile 

 vacuole. Hsiung (1930) found this species 

 in the cecum or colon of 7 out of 46 horses 

 in Iowa. 



Genus AMPULLACULA Hsiung, 1930 



The body is flask-shaped. Its pos- 

 terior half is covered with fine, short 

 cilia, and its neck with longer cilia. 



Artipidlacula a»ipi<lla (Fiorentini, 

 1890) Hsiung, 1930 measures about 110 

 by 40)jl. The cytostome is at the anterior 

 end. This species occurs in the cecum of 

 the horse. 



Genus BLEPHAROCONUS 

 Gassovsky, 1919 



The body is ovoid. The cytostome is 

 small, and the cytopharynx has rods in 

 its wall. There are cilia on the anterior 

 third to half of the body and at the caudal 

 end. The macronucleus is ovoid. There 

 are 3 contractile vacuoles. 



Bleplmroconus hemiciliatus Gassov- 

 sky, 1919 has a conical body and measures 

 83 to 135 by 45 to 65ji . The macronucleus 

 is nearly spherical. This species occurs 

 in the colon of the horse. 



B. cervicalis Hsiung, 1930 is ovoid, 

 with a blunt anterior and a rounded pos- 

 terior end, and measures 56 to 83 by 48 

 to 70 /i. There is usually a short neck 

 which is formed by a slight groove. The 

 macronucleus is more or less disc-shaped. 

 The concretion vacuole is small and ellip- 

 soidal. Hsiung (1930) found this species 

 in the colon of 2 out of 46 horses in Iowa. 



macronucleus is a thick disc. The con- 

 cretion vacuole is large and ellipsoidal. 

 Hsiung (1930) found this species in the 

 colon or feces of 2 out of 46 horses in Iowa. 



Genus BLEPHAROPROSTHIUM 

 Bundle, 1895 



The body is piriform, with a contrac- 

 tile anterior half. There are cilia on the 

 anterior half and at the posterior end. 

 The macronucleus is kidney- shaped. 



Blepliaroprosthium pireum Bundle, 

 1895 measures 54 to 86 by 34 to 52 /j.. 

 The cytostome is anterior. The cytopharynx 

 is funnel-shaped. The concretion vacuole 

 contains numerous granules and is found in 

 the anterior half of the body close to the 

 surface. There is a contractile vacuole 

 at the posterior end. Hsiung (1930) found 

 this species in the cecum of 13 and the 

 colon of 4 out of 46 horses in Iowa. 



Genus BllPHAROSPHAlRA 

 Bundle, 1895 



The body is spherical or ellipsoidal. 

 Cilia cover the anterior 3/4 of the body, 

 and there is also a caudal tuft of cilia. 



Blepliarospliaera intestinalis Bundle, 

 1895 is spherical and 38 to 74 /i in diam- 

 eter. Its macronucleus is a thick, ellip- 

 soidal disc. Hsiung (1930) found this 

 species in the cecum of 9 and the colon of 

 2 out of 46 horses in Iowa. 



B. ellipsoidalis Hsiung, 1930 is ellip- 

 soidal and measures 34 to 65 by 27 to 49 |i. 

 Its macronucleus is sausage-shaped. 

 Hsiung (1930) found this species in the 

 cecum of 4 and the colon of 2 out of 46 

 horses in Iowa. 



Genus BLEPHAROIOUM 

 Gassovsky, 1919 



B. benbrooki Hsiung, 1930 is ovoid 

 to ellipsoidal, with a knob-like anterior 

 end and a rounded posterior one, and 

 measures 21 to 37 by 17 to 26 p.. The 



The body is ellipsoidal, with an atten- 

 uated anterior end, and is uniformly cil- 

 iated. The cytostome is near the anterior 

 tip. There are 2 to 4 contractile vacuoles. 



