NO. I LOWER EOCENE MAMMALIAN FAUNAS — GAZIN 97 



Page 



Figs. 8-9. Lambdotherium popoagicum Cope 75 



8, Right upper cheek teeth, P^-M« (U.S.N.M. No. 18232), occlusal 

 view. iH X natural size. La Barge, Green River Basin, Wyoming. 

 9, Left lower cheek teeth, P2(part)-M3 (U.S.N.M. No. 22793), oc- 

 clusal view, ij^ X natural size. New Fork, Green River Basin, 

 Wyoming. 



Fig. id. Chlorohysis knight ensis Gazin 32 



Right lower cheek teeth, P4-M3 (Univ. Calif. No. 46705), lateral and 

 occlusal views. 5 X natural size. Dad, Washakie Basin, Wyoming. 



Plate 13 



hyracotherium and heptodon from the lower eocene 

 of wyoming 



Figs, i, 2, 4-10. Hyrac other ium vasacciense (Cope) yz 



I, Left upper cheek teeth, P'-M* (U.S.N.M. No. 21350), occlusal view. 

 2 X natural size. New Fork, Green River Basin, Wyoming. 2, Left 

 lower cheek teeth, P3-M3 (U.S.N.M. No. 22491), occlusal and lateral 

 views. 2 X natural size. New Fork, Green River Basin, Wyoming. 

 4, Left upper premolars, P'-P* (U.S.N.M. No. 19738), occlusal view. 

 2 X natural size. La Barge, Green River Basin, Wyoming. 5, Right 

 upper premolars, P^-P* (U.S.N.M. No. 22408), occlusal view. 2X 

 natural size. La Barge, Green River Basin, Wyoming. 6, Right 

 upper premolars, P"-P* (U.S.N.M. No. 19745), occlusal view, 2X 

 natural size. La Barge, Green River Basin, Wyoming. 7, Left upper 

 premolars, P*-P* (U.S.N.M. No. 19744), occlusal view. 2X natural 

 size. La Barge, Green River Basin, Wyoming. 8, Left upper pre- 

 molars, P^-P* (U.S.N.M. No. 22494), occlusal view. 2X natural 

 size. La Barge, Green River Basin, Wyoming. 9, Left upper pre- 

 molars, P^-P* (U.S.N.M. No. 22495), occlusal view. 2X natural 

 size. La Barge, Green River Basin. Wyoming. 10, Right upper 

 premolars, P*-P* (U.S.N.M. No. 22496), occlusal view. 2X natural 

 size. Dad, Washakie Basin, Wyoming. 



Fig. 3. Hyracotherium cf. angustidens (Cope) 72 



Left upper premolars, P'-P* (U.S.N.M. No. 22492), occlusal view. 

 2 X natural size. Elk Mountain, Fossil Basin, Wyoming. 



Fig. 1 1. Hyracotherium cf. craspedottim Cope 74 



Left premolars, P*-P* (U.S.N.M. No. 22497), occlusal view. 2 X natu- 

 ral size. Cathedral Blufifs, Washakie Basin, Wyoming. 



Fig. 12. Heptodon ventorum ( Cope) 7S 



Right cheek teeth, P3-M3 (U.S.N.M. No. 22498), occlusal and lateral 

 views, ij^ X natural size. Dad, Washakie Basin, Wyoming. 



Plate 14 

 hexacodus and bunoppiorus from the lower eocene of 



WYOMING ' 



Figs, i, 3. Cf. Hexacodtis pelodes Gazin 82 



I, Left upper molars, M*-M* (U.S.N.M. No. 22248), occlusal view. 



