17S 



osborn: OLIGOCENE, MIOCENE, PLIOCENE EQUID.E. 



Hipparion afiine Leidy 1869. 



Text Fig. 141. 



Hipparion affine, Leidy, Joseph. "The Extinct Mammalian Fauna of Dakota and Nebraska," Jour. Acad. Nat. Sci. Phila. (2) 

 Vol. VII, 1869, p. 286, PI. xviii, figs. 20-23. 



Fig. 141. (Upper) Original figures of the type of Hipparion affine Leidy, U. S. Nat. Mus. 584, p 2 , p 3 , nr. After 

 Leidy, 1869, PI. xviii, figs. 20-23. Natural size. (Middle) Type upper molars, redrawn under direction of Osborn, by 

 S. Oka, partly reversed in drawing; crown view of ?p' 2 , 3 of the right side, reversed in drawing, p 3 , ur of the left 'side. (Lower) 

 Internal and anterior views of an isolated type molar. 



Horizon, and locality. — (Leidy) " . . . . from the Niobrara River." (Gidley, 1907) Niobrara River near Fort Nio- 

 brara, Nebraska. Nebraska formation, Procainelus, Hipparion zone, Upper Miocene. Name of collector not given. 



Type. — U. S. Nat. Mus. 584. (Leidy) " 1. Five upper molars, apparently from the same individual, consisting of 



