382 



EXTINCT MAMMALIA OF NORTH AMERICA. 



Procamelus occidentalis. 



See page 151, PI. IX, Fig. 5, XV, Figs. 5—7. 

 Leidy : Proc. Ac. Nat. Sc. 1858, 23, 89. 



Sands of the Niobrara River, and Little White River. Pliocene. 



Procamelus gracilis. 



See page 155, PI. XIV, Fig. 15. 



Leidy : Proc. Ac. Nat. Sc. 1858, 89. 

 Sands of the Niobrara River, Nebraska. Pliocene. 



HOMOCAMELUS. 



Homooamelns caninns. 



See page 158, PI. XIV, Figs. 16, 17. 



Sands of the Niobrara River, Nebraska. Pliocene. 



PROTOMERYX. 



Protomeryx Halli. 



See page 160, PI. XV, Figs. 8, 9. 

 Leidy : Proc. Ac. Nat. Sc. 1856, 164 ; 1857, 89. 



From Bear Creek, a tributary of White River, Dakota. Miocene. 



MEGALOMERYX. 



Megalomeryx niobrarensis. 



See page 161, PI. XIV, Figs. 12—14. 

 Leidy : Proc. Ac. Nat. Sc. 1858, 24. 



Sands of the Niobrara River, Nebraska. Pliocene. 



MERYCODUS. 



Merycodus necatus. 



See page 162, PL XIV, Figs. 9, 10. 

 Leidy : Proc. Ac. Nat. Sc. 1854, 90, 157 ; 1857, 89 ; 1858, 23. 



From Bijou Hill, Little White River, and the Niobrara River. Pliocene. 



CAMELOPS. 



Camelops Kansanus. 



Leidy: Proc. Ac. Nat. Sc. 1854, 172 ; Jour. Ac. Nat. Sc. 1856, III, 166, PI. 17, Figs. 8—10. 



Indicated by a small fragment of an upper jaw, found in the gravel drift of Kansas. 

 Post-pliocene. 



Corresponding parts are not in our possession to ascertain the case, but it is not 

 improbable that this genus may on future discovery prove to be the same as Pro- 



camelus. 



