618 



FOSSIL VERTEBRATA OF NORTH AMERICA. 



[BULL. 179. 



Roger, O. 18% A, p. 177. (Protohippus.) 

 Trouessart, E. L. 1898 A, p. 785. (Protohippus.) 



Miocene (Loup Fork); Nebraska, Colorado, 

 South Dakota, Texas, 



Merychippus sejunctus (Cope.) 

 Cope, E. D. 1874 P, p. 15. (Protohippus.) 



1873 R, p. 420. (Protohippus; no descrip- 

 tion.) 



1874 B, pp. 523, 524. (Protohippus. ) 

 1881 1, p. 271, fig. 3. (Protohippus. ) 

 1884 J, p. 544, fig. 3. (Protohippus.) 

 1886 B, p. 359. (Protohippus.) 



1886 H. (Protohippus.) 



1887 N, p. 1071, fig. 39. (Protohippus.) 

 1887 S, p. 271, fig. 3. ( Protohippus. ) 

 1889 C, p. 160. (Protohippus.) 



1893 A, pp. 23, 25. (Protohippus.) 

 Matthew, W. D. 1899 A, p. 69. (Protohippus.) 

 Roger, O. 18% A, p. 177. (Protohippus.) 

 Scott, W. B. 1893 B, p. 659. (Protohippus.) 

 Trouessart, E. L. 1898 A, p. 784. (Protohippus,) 

 Woodward, A. S. 1898 B, p. 337, fig. 194. (Proto- 

 hippus.) 



Wortman, J. L. 1883 A, p. 711, figs. 141,142. (Pro- 

 tohippus. ) 



Zittel, K. A. 1893 B, p. 256, figs. 200, 201. (Proto- 

 hippus.) 



Miocene (Loup Fork); Colorado, Montana, 

 Oregon? New Mexico?. 



Merychippus supremus (Leidy.) 



Leidy, J. 1869 A, pp. 328, 401, pi. x 

 (Protohippus.) 



Cope, E. D. 1893 A, p. 25. (Syn. of Protohippus 

 mirabilis.) 



King, C. 1878 A, p. 430. (Protohippus.) 



Leidy, J. 1870 W, p. 127. (Protohippus.) 

 1871 C, p. 360. (Protohippus.) 



Matthew, W. D. 1899 A, p. 70. (Syn. of Protohip- 

 pus mirabilis. ) 



Roger, 0. 18% A, p. 177. (Protohippus.) 



Trouessart, E. L. 1898 A, p. 784. (Syn.? of Proto- 

 hippus mirabilis.) 

 Miocene (Loup Fork); South Dakota. 



Merychippus sp. indet. 

 Cope, E. D. 1877 K, p. 323, pi. Ixxxv, fig. 7. (Pro- 

 tohippus sp. ) 

 Miocene (Loup Fork); New Mexico. 



Merychippus sp. indet. 



Scott, W. B. 1895 C, p. 93, pi. ii, fig. 17. ( Proto- 

 hippus sp.) 



Trouessart, E. L. 1898 A, p. 784. (Syn.? of Proto- 

 hippus mirabilis.) 

 Miocene; Montana. 



PLIOHIPPUS Marsh. Type P. pernix Marsh. 



Marsh, 0. C. 1874 B, p. 252. 



Cope, E. D. 1879 A, p. 47. (Syn. of Hippidium.) 



1880 B, p. 47. (Syn. of Hippidium. ) 

 Dana, J. D. 1896 A, p. 913, fig. 1540. 

 Flower'and Lydekker 1891 A, p. 381. 



Landois, . 1881 A, p. 128. 



Marsh, O. C. 1874 D. 



1877 E, p. 359. 



1879 D, p. 504. 



1892 C, p. 354. 



Matthew,W. D. 1899 A, p. 70. 

 Nicholson and Lydekker 1889 A, p. 1356. 

 Schlosser, M. 1886 B, p. 15. 

 Weithofer, A. 1888 A, p. 276. 

 Zittel, K. A. 1893 B, p. 256. 



Pliohippus gracilis Marsh. 



Marsh, 0. C. 1892 C, p. 347. 

 Pliocene; Oregon. 



Pliohippus pernix Marsh. 

 Marsh, O. C. 1874 B, p. 252. 

 Cope, E. D. 1880 G. (Hippidium.) 

 King, C. 1878 A, p. 430. 



Marsh, O. C. 1897 C, pp. 524,527, fig. 99. 

 Matthew, W. D. 1899 A, p. 70. 

 Roger, 0. 1896 A, p. 177. 

 Trouessart, E. L. 1898 A, p. 785. 



Miocene (Loup Fork); Nebraska, Colorado. 



Pliohippus robustus Marsh. 

 Marsh, 0. C. 1874 B, p. 253. 

 Cope, E. D. 1880 G. (Hippidium.) 

 King, C. 1878 A, p. 430. 

 Matthew, W. D. 1899 A, p. 70. 

 Roger, 0. 18% A, p. 177. 

 Trouessart, E. L. 1898 A, p. 785. 



Miocene (Loup Fork); Nebraska. 



Pliohippus simplicidens (Cope.) 

 Cope, E, D. 1892 J, p. 124, fig. 1. (Equus.) 



1892 E, p. 252. (Equus.) 



1892 G, p. 228. (Equus.) 



1892 P. (Equus. ) 



1893 A, pp. 41, 44, 66, pi. xx, figs. 1-3. (Equus. ) 

 Gidley, J. W., 1901, Bull. Amer. Mus. Nat. Hist., 



xiv, p. 123. 

 Trouessart, E. L. 1898 A, p. 785. 



Pliocene (PaloDuro, Blanco); Texas. 



HIPPIDION Owen. Type Equus neogseus Lund. 



Owen, R. 1870 B, p. 572. 



The amended form of this name, Hippidium, 

 is employed by many authors. 

 Ameghino, F. 1889 A, p. 513. 

 1891 A. 

 1891 C, p. 215. 

 Branco, W. 1897 A, pp. 19, 78. 



Burmeister, H. 1875 A. 



1889 A, p. 3. 

 Cope, E. D. 1879 A, p. 47. 



1880 B, p. 47. 



1881 G, p. 400. 

 1884 O, p. 715. 

 1887 N, p. 1073. 



