g6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I44 



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Figs. 3, 4. Meniscothcrium, cf. chamense Cope 69 



3, Left upper dentition I*-M* (U.S.N.M. No. 22435), occlusal view. 

 4, Left ramus of mandible, L-Ma (U.S.N.M. No. 22435), occlusal and 

 lateral views, ij^ X natural size. New Fork, Green River Basin, 

 Wyoming. 



Figs. 5, 6. Memscotherimn, cf. priscum Granger 67 



5, Right maxilla, P', M^-M' (U.S.N.M. No. 22431), occlusal view. 

 6, Right ramus of mandible, M1-M2 (U.S.N.M. No. 22432), occlusal 

 and lateral views, ij^ X natural size. Bitter Creek, Washakie Basin, 



Wyoming. 



Plate ii 



CORYPHODON FROM THE LOWER EOCENE OF WYOMING 



Figs. 1-5. Coryphodon radians (Cope) 70 



I, Left upper cheek teeth, P^'-M' (U.S.N.M. No. 20737), occlusal view. 

 Ys natural size. La Barge, Green River Basin, Wyoming. 2, Left 

 upper cheek teeth, P^M' (U.S.N.M. No. 16701), occlusal view, ^ nat- 

 ural size. La Barge, Green River Basin, Wyoming. 3, Left upper 

 cheek teeth, P^-M* (U.S.N.M. No. 20731), occlusal view. Ys natural 

 size. Elk Mountain, Fossil Basin, Wyoming. 4, Left upper cheek 

 teeth, P'-M' (U.S.N.M. No. 2274S), occlusal view. % natural size. 

 Bitter Creek, Washakie Basin, Wyoming. 5, Left upper cheek teeth, 

 P^-M' (U.S.N.M. No. 22748), occlusal view. ^3 natural size. Bitter 

 Creek, Washakie Basin, Wyoming. 



Plate 12 



coryphodon, perissodactyls, taeniodont, and primate 

 from the lower eocene of wyoming 



Figs. 1-2. Coryphodon radians (Cope) 70 



I, Right lower cheek teeth, P1-M3 (U.S.N.M. No. 21026), occlusal view. 

 ^ natural size. Elk Mountain, Fossil Basin, Wyoming. 2, Right 

 lower molars, M1-M3 (U.S.N.M. No. 22746), occlusal view, Ys natu- 

 ral size. Bitter Creek, Washakie Basin, Wyoming. 



Figs. 3-4. Hyrachyiis, cf. modestiis (Leidy) 80 



3, Right M* (U.S.N.M. No. 22771), occlusal view. 4, Right P* 

 (U.S.N.M. No. 22772), occlusal view. Natural size. New Fork, 

 Green River Basin, Wyoming. 



Figs. 5-6. Homogalax primaevus ( Cope) yy 



5, Left upper cheek teeth, P' (P* partially concealed)-M* (incomplete) 

 (U.S.N.M. No. 22767), occlusal view. 6, Left lower molars 

 (U.S.N.M. No. 22768), occlusal view, i^ X natural size. Bitter 

 Creek, Washakie Basin, Wyoming. 



Fig. 7. Ectogatms, sp am 



Left Dp4, M8(?) and M3(?) incomplete (U.S.N.M. No. 22785), oc- 

 clusal view. Fossil Butte, Fossil Basin, Wyoming. 



