606 



PROTOZOOLOGY 



I. prostoma S. (Fig. 287, c). 80-195m by 53-85/x. 

 I. intestinalis S. (Fig. 287, d). 97-130/x by 68-88m. 

 Genus Dasytricha Schuberg. Oval, flattened; cilia in longitudinal 

 spiral rows; no karyophore; in the stomach of cattle. 

 D. ruminantium S. (Fig. 287, e). 50-75/i by 30-40^. 



Fig. 287. a, Paraisotricha colpoidea, X270 (Hsiung); b, P. beckeri, X360 

 (Hsiung); c, Isotricha prostoma, X500 (Becker and Talbott); d, /. intes- 

 tinalis, X500 (Becker and Talbott); e, Dasytricha ruminantium, X330 

 (Becker and Talbott); f, Cyathodinium piriforme, X1290 (Lucas); g, 

 Blepharocorys uncinata, X540 (Reichenow); h, B. bovis, X850 (Dogiel); 

 i, Charon equi, X570 (Hsiung). 



Family 13 Cyathodiniidae da Cunha 

 Genus Cyathodinium da Cunha. Conical or pyriform; broad cyto- 

 stome occupies the entire anterior end and extends posteriorly 1/4- 

 3/4 the body length; deep with prominent ridges; oral cilia in a sin- 

 gle row on left ridge; body cilia comparatively long, confined to an- 

 terior half; macro nucleus round or ellipsoid; a micro nucleus; one to 

 several contractile vacuoles; in the caecum and colon of guinea pigs. 

 C. conicum da C. Inverted cone; 50-80/i by 20-30m; in the caecum 

 of Cavia aperea and C. porcella. 



