HOLOTRICHA 



rai 



Family 12 Isotrichidae Blitschli 



Genus Isotricha Stein. Ovoid; flattened; dense longitudinal ciliary 

 rows; cytostome at or near anterior end ; several contractile vacuoles; 

 reniform macronucleus and a micronucleus connected with, and 

 suspended by, fibrils, karyophore; locomotion with posterior end 

 directed forward; in the stomach of cattle and sheep. 



Fig. 320. 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 pirijorme, X1290 (Lucas); g, 

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

 i, Charon equi, X570 (Hsiung). 



/. prostoma S. (Fig. 320, c). 80-195/z by 53-85/x. Cytology (Camp- 

 bell, 1929). 



I. intestinalis S. (Fig. 320, d). 97-130ju by 68-88/z. 



Genus Dasytricha Schuberg. Oval, flattened; cilia in longitudinal 

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



D. ruminantium S. (Fig. 320, e). 50-75ju by 30-40^. 



