J. B. Hatcher — Recent and Fossil Tapirs. 



167 



and without the hook seen in recent Tapirs. The supinator 

 ridge is rather more prominent than in recent Tapirs. The 

 internal condyle is broader and stronger than the external. 

 The anconeal fossa is deep and the supratrochlear shallow : 

 there is no intercondylar foramen. The axis of the trochlea 

 is at nearly right angles to that of the shaft. The intercondy- 

 lar ridge is prominent and situated well outward, the ulnar 

 articulation being much larger than the radial. 



Fig. 1. Humerus of Protapirus 

 validus. 



Fig. 2. Radius and ulna of Prota- 

 pirus validus 



The radius and ulna are proportionally rather more slender 

 than the humerus. The olecranon is not pointed superiorly as 

 in JZlasmognathus, but is of nearly equal breadth from top to 

 bottom. The proximal articulations of the radius and ulna 

 bear about the same relations to each other, and to the 



