SPIROTRICHA, OLIGOTRICHA 



591 



Fig. 267. a, Ophryoscolex bicoronatus, X340 (Dogiel); b, 0. caudatus, 

 X310 (Dogiel); c, 0. quadricoronatus, X340 (Dogiel); d, Caloscolex 

 cuspidatus, XBIO (Dogiel); e, Entodinium caudatum, X500 (Becker 

 and Talbott); f, E. bursa, X390 (Schuberg); g, Amphacanthus ovum- 

 rajae, X350 (Dogiel). 



cronucleus anterior to middle and on left- ventral side of macro- 

 nucleus; in cattle and sheep. Numerous species. 



E. caudatum S. (Fig. 267, e). 50-80^ long; in cattle and sheep. 



E. bursa S. (Fig. 267, /). 55-1 14^ by 37-78m (Schuberg); 80m 

 by 60m (Becker and Talbott) ; in stomach of cattle. 



Genus Amphacanthus Dogiel. Similar to Entodinium; but 

 spinous processes at both anterior and posterior ends ; in stomach 

 of Camelus dromedarius. One species. 



A. ovum-rajae D. (Fig. 267, g). 46-55m by 32-48m. 



