342 E. L. Troxell — Early Pliocene One-Toed Horse. 



Measurements of the Radius. 



Shaft ant-post 1 1 mm 



Proximal and ant post 38 



Distal end ant-post 40 



Shaft transverse 24 



Proximal end transverse 58 



Distal end transverse 56 



Length 263 



Fig. 6. 



Fig. 6. Radius and Ulna. Rear, side and front views. One-third natu- 

 ral size. 



found, but no positive evidence of this feature lias, heretofore, 

 been presented. 



The splints, Metacarpals II and IV, unlike those of Equus 

 extend the lengths of the cannon bone, but like those of the 

 modern horse they bear no digits on the ends. These slender 



