390 EXTINCT MAMMALIA OF NORTH AMERICA. 



Palceothermm ffiffanteum, Leidy : Anc. Fauna Neb. 1853, 78, PI. XVII. 

 PalcBotherium f giganteum, Gervais : Zool. Pal. Fr. 1848—1852, I, 187.* 

 Titanotherium, Greene: Proc. Ac. Nat. Sc 1853, 292, 

 Eotherhmi americanum, Leidy: Proc. Ac. Nat. Se. 1853, 392. 

 Leidyotherium, Prout : Trans. Ac. St. Louis, 18G0, 699. 



From the lowest stratum of the tertiary deposits of the Mauvaises Terres of White 

 River, Dakota. The tooth supposed to be characteristic of Leidi/oiherium, and re- 

 ported to have been obtained near Abingdon, Virginia, is a fossil from the Mauvaises 

 Terres of White River, Dakota. Miocene. 



'J 



PERISSODACTYLA.. 



EHINO CER TIDM. 



ACERATHERIUM. 



Aceratherium occidentale. 



See page 220, PL XXI, Fig. 34 ; XXII ; XXIII, Figs. 1-3. 

 Rldnoeeros occidentalis, Leidy: Proc. Ac. Nat. Sc. 1850, 119,276; 1853, 392; 1857,89; 1865, 



176; Owen's Rep. Geol. Surv. Wisconsin, &c. 1852, 552, Tab. IX, Figs. 1, 2, XIV, XV, Fig. 



4 ; Anc. Fauna Neb. 1853, 81, PI. XII, XIII ; the present work, 220. 

 Acerotherlum, Leidy : Proc. Ac. Nat. Sc. 1851, 331. 

 Aceratherium occidentale, Leidy: Proc. Ac. Nat. Sc. 1854, 157. 



Mauvaises Terres of White River, Dakota. Miocene. 



RHINOCEROS. 



Rhinoceros crassus. 



See page 228, PI. XXIII, Figs. 4-9. 



Leidy : Proc. Ac. Nat. Sc. 1858, 28 ; 1865, 176. 

 Sands of the Niobrara River, Nebraska. Pliocene. 



Rhinoceros meridianns. 



See page 229, PI. XXIII, Fig. 10. 



Leidy : Proc. Ac. Nat. Sc. 1865, 176. 

 From Washington County, Texas. Miocene ? 



Rhinoceros hesperins. 



See page 230, PI. XXIIL Figs. 11,12. 

 Leidy : Proc. Ac. Nat. Sc. 1865, 176. 



From Calaveras County, California. Miocene ? 



* Gervais in a note observes that " the animal indicated under this name by Prout is viewed by M. Pomel 

 as the type of a new genus, which he calls Menodus." I have not been able to find M. Pomel's notice in 

 any of the works to which I have access. His name probably antedates that of Titanotherium. 



