HAY.] 



CATALOGUE. 



611 



Roger, O. 18% A, p. 168. 



Riitimeyer, L. 1888 A, p. 15. 



Schlosser, M. 1886 B, pi. v, fig. 32; pi. vi, fig. 34. 

 (Hyracotherium.) 



Woodward, A. S. 1898 B, p. 324, fig. 184. (Hyraco- 

 therium. ) 



Wortman, J. L. 1883 A, p. 709, figs. 128-130. 



18% A, p. 105, pi. ii, fig. N; text figs. 14. 15. 



( Protorohippus. ) 

 Zittel, K. A. 1893 B, p. 240, figs. 174, 175. 



Eocene (Wind River); Wyoming, Colorado. 



HELOIIIPPUS Marsh. Type Lophiodon pumilus Marsh. 



Mu-xh. 0. C. 1892 C, p. 353. 

 Helohippus pumilus Marsh. 

 Marsh, 0. C. 1871 D, p. 38. (Lophiodon.) 



Leidy, J. 1872 B, p. 



(Lophiodon.) 



Leidy, J. 1872 C, p. 20. (Lophiodon.) 

 Marsh, O. C. 1892 C, p. 353. 

 Matthew, W. D. 1899 A, p. 45. 

 Roger.'O. 18% A, p. 169. 



Eocene (Bridger); Wyoming. 



OROHIPPUS Marsh. Type 0. pumilis Marsh. 



Marsh, 0. C. 1872 I, p. 207. 



Cope, E. D. 1872 N, p. .466. (Helotherium, type 

 H. procyoninus.) 



1873 E, p. 606 (Orohippus); p. 607 (Oligoto- 

 mus). 



1873 U, p. 2. (Oligotomus, type 0. cinctus.) 



1874 M. (Syn. of Hipposyus.) 



1875 C, pp. 13, 18, 20 (Orotherium); p. 19 

 (Orohippus). 



1877 K, p. 258 (Syn. of Hyracotherium); p. 

 252 (Orotherium). 



1887 N, pp. 997, 1074. (Syn. of Pliolophus.) 



1892 S, p. 411. 



Dana, J. D. 18% A, p. 913, fig. 1540. 

 Fair, M.S. 18% A, p. 157. (Syn.of Pachynolophus.) 

 Flower, W. H. 1876 B, xiii, p. 327. 

 Flower and Lydekker 1891 A, p. 374. (Syn. of 



Pachynolophus. ) 

 Gaudry, A. 1878 B, p. 142. 

 Huxley, T. H. 1876 B, xiv, p. 34. 



1876 C, p. 294. 

 Landois, 1881 A, p. 128. 



Leidy, J. 1871 C, p. 358. (Lophiotherium.) 

 1873 B, p. 69. ( Lophiotherium. ) 



Lydekker, R. 1886 A, p. 10. (Syn. of Hyracothe- 

 rium.) 



Marsh, O. C. 1872 I, p. 217. (Orotherium, type O. 

 uintanum.) 



1873 H, p. 407. 



1874 B, p. 247. 

 1874 D, p. 66. 



1876 G. 



1877 E. 



1879 D, p. 504. 



1892 C, p. 348. 



1898 E, p. 568. 



Nicholson and Lydekker 1889 A, p. 1356. 

 Osborn, H. F. 1890 D, p. 506. (Syn. of Pliolophus.) 

 Osborn, Scott, and Speir 1878 A, p. 17 (Oligoto- 

 mus); p. 24 (Orohippus). 

 Schlosser, M. 1886 B, p. 13. (Orotherium.) 

 Scott, W. B. 1891 B, p. 302. 

 Tomes, C. S. 1898 A. p. 415. 

 Weithofer, A. 1888 A, p. 278. 



Wortman, J. L. 1883 A, p. 709. (Syn. of Hyraco- 

 therium.) 



18% A, pp. 92, 93, 108, fig. 18; pi. ii, fig. E. 

 Zittel, K. A. 1893 B, p. 242. (Syn. of Pachynolo- 

 phus. ) 



Orohippus agilis Marsh. 

 Marsh, 0. C. 1873 H, p. 407. 

 Cope, E. D. 1875 C, p. 22. 



1877 K, p. 267. (Hyracotherium.) 

 Gaudry, A. 1878 B, p. 143. 

 King, C. 1878 A, p. 404. 

 Marsh, O. C. 1874 B, pp. 248, 255, figure. 



1892 C, p. 349, figs. 16, 17. 

 Matthew, W. D. 1899 A, p. 45. 

 Osborn, H. F. 1890 D, p. 506. (Epihippus.) 

 Roger, 0. 18% A, p. 171. (Epihippus.) 

 Trouessart, E. L. 1898 A, p. 777. (Epihippus.) 



Eocene (Bridger) ; Wyoming: Eocene (Uinta) ; 

 New Mexico. 



Orohippus ballardi (Marsh). 

 Marsh, O. C. 1871 D, p. 39. (Lophiotherium.) 

 Leidy, J. 1872 B, p. 365. (Lophiotherium.) 

 Marsh, O. C. 1872 I, p. 217. (Lophiotherium.) 

 Roger, 0. 18% A, p. 170. (Pachynolophus.) 

 - Eocene (Bridger); Wyoming. 



Orohippus cinctus ( Cope) . 

 Cope, E. D. 1873 U, p. 2. (Oligotomus.) 



1873 E, p. 607. (Oligotomus.) 



1884 O, p. 653, pi. xxiv, fig. 26. (Pliolophus, ) 

 Matthew, W. D. 1899 A, p. 45. (Oligotomus.) 

 Osborn, Scott, and Speir 1878 A, p. 17. (Oligoto- 

 mus.) 



Roger, 0. 18% A, p. 170. (Pachynolophus.) 

 Trouessart, E. L. 1898 A, p. 774. 

 Wortman, J. L. 18% A, p. 103. 

 Eocene (Bridger); Wyoming. 



Orohippus major Marsh. 



Marsh, 0. C. 1874 B, p. 248. 



Matthew, W. D. 1899 A, p. 45. 



Osborn, H. F. 1890 D, p. 544, figures. (Pliolo- 

 phus.) 



Osborn, Scott, and Speir 1878 A, p. 24, pi. ix, figs. 

 1-7. (Identification doubtful.) 



Trouessart, E. L. 1898 A, p. 772. 

 Eocene (Bridger); Wyoming. 



Orohippus osbornianus (Cope). 

 Cope, E. D. 1884 O, pp. 630, 647, pi. xxiv, fig. 23. 

 (Hyracotherium.) 



1873 E, p. 607. (Orotherium sylvaticum, not 

 Lophiotherium sylvaticum of Leidy. ) 



