38 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



585. Hipparion affine Leidy. Paratype. 



Last upper molar, m 3 , of left side. Loup Fork (Upper 

 Miocene). Niobrara River, Nebraska. 



Leidy, Journ. Acad. Nat. Sci. Phila. (2), VII, 1869, pp. 286, 402, 



pi. iS, fig. 24. 



= Neohipparion affine. 



562. Hipparion affine Leidy? Plesiotype. 



Series of lower teeth of right side, p 2 to m Loup Fork 

 (Upper Miocene). Niobrara River, Nebraska. 



Leidy, Journ. Acad. Nat. Sci. Phila. (2), VII, 1869, p. 317, pi. 19, 



fig- 3- 

 = Neohipparion affine ? 



587. Hipparion gratum Leidy. Cotypes. 

 5445 (1) Right upper premolar, p 2 , associated with last upper 



to molar; (2) right upper molar, ?nr; (3) right and left 



5447. last upper molars; (4) right upper molar, ?m I . Loup 



Fork (Upper Miocene). Niobrara River, Nebraska. 



Leidy, Jour. Acad. Nat. Sci. Phila. (2), VII, 1869, p. 287, pi. 18, 

 figs. (1) 25, 26; (2) 27; (3) 28, 29; (4) 30. 



= Neohipparion gratum. 



624. Hipparion gratum Leidy? Plesiotype. 



Series of lower teeth of right side, p 2 -m 2 . Loup Fork 

 (Upper Miocene). Niobrara River, Nebraska. 



Leidy, Journ. Acad. Nat. Sci. Phila. (2), VII, 1869, p. 318, pi. 19, 

 fig. 6. 



= Neohipparion gratum? 



3306. Hipparion ingenuum (Leidy). See Hippotherium ingenuum 



3308. and Hippotherium gratum. 



33 26 - 



3292. Hipparion plicatile (Leidy). See Hippotherium plicatile. 

 (Also catalogue numbers 3293-3398, 3309, 3315, 3317, 3319.) 



588. Hipparion speciosum Leidy. Plesiotypes. 

 590. (1) Four upper teeth, ]f-p l of left side and p 3 of right side; 



(2) three upper cheek teeth of left side, p 2 , p 3 , and 

 m 2 ; (3) three upper cheek teeth of right side. Loup 

 Fork (Upper Miocene). Niobrara River, Nebraska. 



Leidy, Journ. Acad. Nat. Sci. Phila. (2), VII, 1869, p. 282-285, pL 

 iS, (1) figs, 7-10; (2) figs. 6, 11, 12; (3) figs. 13-15. 



589. Hipparion speciosum Leidy? Plesiotype. 



Series of lower teeth of right side, p 2 -m 3 . Loup Fork 

 (Upper Miocene). Niobrara River, Nebraska. 



Leidy, Journ. Acad. Nat. Sci. Phila. (2), VII, 1869, p. 318. pi. 19, 

 fig- 4- 

 598. Hipparion speciosum Leidy. Plesiotypes. 



Four isolated molars. Loup Fork (Upper Miocene). 

 Xiobrara River, Nebraska. 



Leidy, Journ. Acad. Nat. Sci. Phila. (2), VII, 1869, p. 320, pi. 19, 

 figs. 19-22. 



