EXTINCT MAMMALIA OF NORTH AMERICA. 381 



Leptauchenia decora. 



See page 127, PI. XII, Figs. 6—20. 

 Leidy : Proc. Ac. Nat. Sc. 1856, 88 ; 1857, 89. 



From the same localities as the former species. Miocene. 



Leptanchenia nitida. 



See page 129, PI. XII, Figs. 21, 22. 



From White Earth Creek, Dakota. Miocene, 



A OR 10 CHCERWJE. 



AGRIOCHCERUS. 



Agriochoerns antiq-ans. 



See page 132, PI. XIII, Fig. 4. 

 Leidy: Proc. Ac. Nat. Sc. 1850, 121; 1853, 392; 1854, 157; 1857, 89; Anc. Fauna Neb. 18.53, 



24, PI. I, Figs. 5—10. Bronn : Leth. Geog. 1856, 933. 

 ? Eiicrotaphus Jacksoni, Leidy: Proc. Ac. Nat. Sc. 1850, 90; Anc. Fauna Neb. 1853, 56, PI. VII, 

 Figs. 4—6. Bronn : Leth. Geog. 1856, 931. 

 Mauvaises Terres of White River, Dakota. Miocene. 



AgrioohcBrus major. 



See page 134. 

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



/ Eiicrotaphus auritus, Leidy : Owen's Rep. Geol. Surv. 1852, 563, PI. XV, Figs. 1, 2 ; Anc. Fauna 

 Neb. 1853, 56, PI. VII, Figs. 1—3. Bronn : Leth. Geog. 1856, 931. 



Mauvaises Terres of White River, Dakota. Miocene. 



Agriochoerns latifrons. 



See page 135, PI. XIII, Figs. 1—3. 

 Leidy : Proc. Ac. Nat. Sc. 1867, 32. 



Mauvaises Terres of White River, Dakota. Miocene. 



CAMELIDJS. 



PCEBROTHERIUM. 



PoBbrotherinm Wilsoni. 



See page 141, PI. XIII, Figs. 5—7. 

 Leidy: Proc. Ac. Nat. Sc. 1847, 322, PI. Figs. 1—4; 1853, 392 ; 1854, 157 ; 1857, 89 ; Owen's, 

 Rep. Geol. Surv. 1852, 571 ; Anc. Fauna Neb. 1853, 19, PI. I, Figs. 1—4. Pictet : TraitO 

 de Paleont. 1853, I, 350. Bronn : Leth. Geog. 1856, 956. 



Mauvaises Terres of White River, Dakota. Miocene. 



PROCAMELUS. 

 Procamelns robustus. 



See page 148, PI. XV, Figs. 1—4. 

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



Sands of the Niobrara River, Nebraska. Pliocene. 



