SPIROTRICHA, OLIGOTRICHA 



593 



Fig. 268. a, Eodinium lobatum, X540 (Kofoid and MacLennan); 

 b, Diplodinium dentatum, X250 (Kofoid and MacLennan); c, Eremo- 

 plastron bovis, X550 (Kofoid and MacLennan); d, Eudiplodinium 

 maggii, X500 (Dogiel); e, Diploplastron affine, X320 (Dogiel); f, 

 Metadinium medium, X320 (Dogiel). 



M. medium A. et M. (Fig. 268, /). 180-272^ by 111-175m; in 

 cattle. 



Genus Pol3T)lastron Dogiel. Adoral and dorsal zones at anterior 

 end; 2 skeletal plates beneath right surface, separate or fused; 3 



