402 EXTINCT MAMMALIA OF NORTH AMERICA. 



From Bijou Hill, Dakota, the Niobrara River, Nebraska, and Washington County, 

 Texas. Pliocene. 



Hipparion a£B.ne. 



See page 286, PI. XVIII, Figs. 20-24. 



Remains from the Niobrara River. Pliocene. 



Hipparion gratnin. 



See pages 287, 326, PI. XVIII, Figs. 25—30. 



Remains from the Niobrara River, Nebraska, and Little White River, Dakota. 

 Pliocene. 



MERYCHIPPUS. 



Merydiippus insignis. 



See page 296, PI. XVII, Fig. 3—7. 

 Leidy : Proc. Ac. Nat. Sc. 1856, 311 ; 1857, 89 ; 1858, 27. 



From Bijou Hill, Dakota, the Niobrara River, Nebraska, and from Washington 



Co., Texas. Pliocene. 



Merychippns mirabilis. 



See page 299, 327, PI. XVII, Figs. 8—15 ; XXVII, Fig. 1. 

 Leidy : Proc. Ac. Nat. Sc. 1858, 27. 



From the Niobrara River, Nebraska. Pliocene. 



ANCHITEERID^. 



ANCHITHERIUM. 



Anchitherinm Bairdi. 



See page 303, PI. XX. 

 Palwotherium Bairdii, Leidy: Proc. Ac. Nat. Sc. 1850, 122. 



Anehitheriwn Bairdii, Leidy : Owen's Rep. Geol. Surv. &c. 1852, 572 ; Anc. Fauna Neb. 1853, 67, 

 PI. X, Figs. 14—21, XI ; Proc. Ac. Nat. Sc. 1853, 392; 1857, 89. 



Remains from the Mauvaises Terres of White River, Dakota. Miocene. 



HYPOHIPPUS. 



Hsrpohippns afKnis. 



See page 311, Pi. XXI, Figs. 11—12. 



Anehitheriwn {Hypohippus) affinis, Leidy : Proc. Ac. Nat. Sc. 1858, 26. 

 From the sands of the Niobrara River, Nebraska. Pliocene. 



PARAHIPPUS. 



Parahippus cognatns. 



See page 314, PI. XXI, Figs. 7—10. 



Anchitherium Parahippus) cognatus, Leidy : Proc. Ac. Nat. Sc. 1858, 26. 

 From the sands of the Niobrara River, Nebraska. Pliocene. 



