118 



osborn: OLIGOCENE, MIOCENE, pliocene eqtjimc. 



above; (5) heel of 1113 small toward crown, elongate toward the base, the crescents strongly recurved at inner side toward 

 the base of tooth; (6) incisors large. (7) Antorbital region of skull moderately elongate. (8) Shaft of ulna moderately 

 reduced, imperfectly united in the immature type; (9) metapodials long, lateral digits moderately reduced; (10) ungual 

 phalanges narrow and short. 



3 



A/o. 9394- Type 



A. M. I 



1 



A/o 9 3 98 C7^>aratLjoe) 

 A. M. 



Fig. 91. Merychippus proparvulus Osborn. (Upper) Amer. Mus. 9394, side view of maxilla fragment of the type, 

 one-half natural size. (6) Crown view of the superior grinding teeth of the type, of the left side. (7) Amer. Mus. 9398, 

 crown view of left superior grinding teeth of a paratype. (Lower) Outer and crown views of the lower grinding teeth of 

 the same paratype. All figures of teeth natural size. 



