EXTINCT MAMMALIA OF NORTH AMERICA. 391 



HYEACODON. 



Hjrracodon nebrascensis. 



See page 232. 

 Rhinoceros NebrascensU, Leidy : Proc. Ac. Nat. Sc. 1850, 121 ; 1853, 392 ; 1857, 89. Owen's Rep. 



etc. 1852, 556, Tab. XII A, Fig. 6, XII B, 5, XV, 3. Anc. Fauna Neb. 1853, 81, PI. XIV, 



XV. 

 Aceratherium Nebrascensis, Leidy: Proc. Ac. Nat. Sc. 1851, 331 ; 1854, 157. 

 Ilynvcodon nebrascensis, Leidy : Proc. Ac. Nat. Sc. 1856, 92 ; 1857, 89 ; 1865, 176. 



Mauvaises Terres of White River, Dakota. Miocene. 



TAPIRIDJE. 



TAPIRUS. 



Tapirus americanns. 



Tapir, Carpenter : Am. Jour. Sci. 1842, XLII, 390; 1846, I, 247. Stuff: L'Institut, 1846, XIV, 



396, fide Jahrb. f. Mineralogie, 1848, 127. Tuomey ; Rep. Geol. South Carolina, 1848, 165, 



166, 208. Cope : Proc. Ac. Nat. Sc. 1867, 138. Blake : Am. Jour. Sc. 1868, XLV, 381. 

 ? Palwotheria, Tuomey : Rep. Geol. South Carolina, 1848, 203. 

 Tapirvs Americanus fossilis, Leidy: Proc. Ac. -Nat. Sc. 1849, 180 ; 1854, 199 ; Waile's Rep. Agric. 



&c. Mississippi, 1854, 280 ; Holmes' Post-pliocene Fos. South Carolina, 1860, 106, PI. XVII, 



Figs. 1-3, 6, 11, 12. 

 Fachyderm, Agassiz : Proc. Am. Assoc. Adv. Sc. 1851, V, 179. 



Remains, mostly of teeth and jaw fragments, undistinguishable from the corres- 

 ponding parts of the -living Tapirus terrestris, have been found in Texas, Louisiana, 

 Mississippi, South Carolina, Virginia, Ohio, Illinois, California and elsewhere. Seeing 

 that different known species of Tapirs exhibit but little or no differences in the parts 

 corresponding to the fossil specimens just indicated, it is not improbable that these 

 really belong to an extinct species. Quaternary in North America. 



Tapirus Haysii. 



Tapir, Hays : Proc. Ac. Nat. Sc. 1852, 53. 



Tapinis Haysii, Leidy : Proc. Ac. Nat. Sc. 1852, 106, 148 ; 1854, 200 ; Anc. Fauna. Neb. 1853, 9 ; 

 Waile's Rep. Agric. &c. Mississipjii, 1854, 286 ; Holmes' Post-pliocene Fos. South Carolina, 

 1860, 106, PI. XVII, Figs. 4, 5, 7-10. Cope, Proc. Ac. Nat. Sc. 1869, 3. 



Remains, consisting of teeth and jaw fragments, from Kentucky, Indiana and Mis- 

 sissippi, apparently indicate a more robust species than the former one. Quaternary. 



LOPHIODON. 

 Lophiodon occidentalis. 



See page 239, PL XXI, Figs. 28-30. 

 Leidy : Proc. Ac. Nat. Sc. 1868, 232. 



From the Mauvaises Terres of White River, Dakota; supposed to be derived from 



the lowest stratum of the tertiary deposit of that locality. Miocene. 



Of uncertain reference. 



Lophiodon, Uweu : I'r. Geol. Soc. Londmi, 1842, III, 693. 



