382 EXTINCT MAMMALIA OF NORTH AMERICA. 



Procamelus ocoidentalis. 



See page 151, PL IX, Fig. 6, XV, Figs. 5—7. 

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



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



Prooamelns gracilis. 



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

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



Sands of the Niobrara River, Nebraska. Pliocene. 



HOMOCAMELUS. 



Homooamelus caninns. 



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



Sands of the Niobrara River, Nebraska. Pliocene. 



PROTOMERYX. 



Protomei^s: 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 niobrareusis. 



See page 161, PI. XIV, Figs. 12—14. 



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

 Sands of the Niobrara River, Nebraska. Pliocene. 



MERYCODUS. 



Merycodns necatus. 



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

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



From Bijou Hill, Little White River, and the Niobrai'a River. Pliocene. 



CAMELOPS. 



Camelops Kansanns. 



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. 



