38 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



585. Hipparion affine I^eidy. Paratype. 



lyast upper molar, nr'', of left side. Loup Fork (Upper 

 Miocene). Niobrara River, Nebraska. 



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

 pi. 18, fig. 24. 



= Neohipparion affine. 



562. Hipparion affine L,eidy? Plesiotype. 



Series of lower teeth of right side, p^ to m lyoup Fork 

 (Upper Miocene). Niobrara River, Nebraska. 



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



fig- 3- 

 = Neohipparion afl&ne? 



587. Hipparion gratum I^eidy. Cotypes. 

 5445 (i) Right upper premolar, p", associated with last upper 



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



5447. last upper molars; (4) right upper molar, ?m'. lyOUp 



Fork (Upper Miocene). Niobrara River, Nebraska. 



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

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



= Neohipparion gratum. 



624. Hipparion gratum Leidy? Plesiotj'pe, 



Series of low^er teeth of right side, p^-m^. 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. 



3326. 



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

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



588. Hipparion speciosum Leidy. Plesiotypes. 

 590. (i) Four upper teeth, p"-p' of left side and p'' of right side; 



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

 m^; (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- 

 18, (i) figs, 7-10; (2) figs. 6, II, 12; (3) figs. 13-15- 



589. Hipparion speciosum Leidy? Plesiotype. 



Series of lower teeth of right side, Pj-nig. Loup Fork 

 (Upper Miocene). Niobrara River, Nebraska. 



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

 fig. 4- 



598. Hipparion speciosum Leidy. Plesiotypes. 



Four isolated molars. Loup Fork (Upper Miocene). 

 Niobrara River, Nebraska. 



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

 figs. 19-22. 



