TYPE-SPECIMENS OE EOSSIL VERTEBRATES. 57 



800. Procamelus robustus Leidy. Paratype. 



Upper molar, m\ Loup Fork (Upper Miocene). Fort 

 Niobrara, Nebraska. 



Leidy, Proc. Acad. Nat. Sci. Phila., 1858, p. 89; Journ. Acad. Nat. 

 Sci. Phila. (2), VII, 1869, pp. 148, 381, pi. 15, fig. 3. 



569. Protohippus mirabilis (Leidy). See Merychippus mirabilis. 



(Also catalogue numbers 571, 572, 580-582.) 



619. Protohippus perditus (Leidy). Type. 



Leidy, Journ. Acad. Nat. Sci. Phila. (2), VII, 1869, p. 275, pi. 17, 



fig. 5- 

 See Equus (Protohippus) perditus. 



620. Protohippus perditus Leidy? Plesiotypes. 

 629. (1) Three lower molars of right side, n^-n^; (2) portion of 



right lower jaw containing three teeth, p 4 , ni 2 , m 3 . 

 Loup Fork (Upper Miocene). Niobrara River, Ne- 

 braska. 



Leidy, Journ. Acad. Nat. Sci. Phila. (2), VII, 1869, p. 315, pi. 19, 

 (1) fig. 5; (2) figs. 13, 14. 



621. Protohippus placidus I^eidy. Cotypes. 

 623. Upper premolar, p 2 , associated with six other upper molar 

 625. teeth and three upper cheek teeth, p 2 right, p 2 and dp 2 



2365. left. L,oup Fork (Upper Miocene). Niobrara River, 



Nebraska. 



Leidy, Journ. Acad. Nat. Sci. Phila. (2), VII, 1869, p. 277, pi. 18, 

 figs. 39-48. 



593. [? Protohippus sp. undet.] 



Portion of left lower jaw containing four teeth, p 2 — m^ 

 Loup Fork (Upper Miocene). Niobrara River, Ne- 

 braska. 



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

 fig. 12 (unnamed). 



[Identified by J. W. Gidley.] 



570. [? Protohippus sp. undet.] 



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, pi. 19, figs. 

 11, 28 (unnamed). 



[Identified by J. W. Gidley.] 



627. [? Protohippus sp. undet.] 



Left lower premolar, p 4 , in fragment of jaw. Loup Fork 

 (Upper Miocene). Niobrara River, Nebraska. 



Leidy, Journ. Acad. Nat. Sci. Phila. (2), VII, 1869, p. 315, pi. 19, 

 fig. 24 (unnamed). 



[Probably a Protohippus. J. W. Gidley.] 



