90 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I44 



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1952. Preliminary analysis of the vertebrate fossil fauna of the Boysen 

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 75-79, I map. 

 Williams, Norman C, and Madsen, James H., Jr. 



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EXPLANATION OF PLATES 

 Plate i 



MARSUPIAL, INSECTIVORES, PRIMATES, AND TILLODONT FROM THE 

 LOWER EOCENE OF WYOMING 



Page 



Fig. I. Peratherium tnorrisi, new species 21 



Right ramus of mandible (P.U. No. 16115), type specimen, occlusal 

 and lateral views. 5 X natural size. Cathedral Bluffs, Washakie 

 Basin, Wyoming. 



Fig. 2. Amaramnis gregoryi, new genus and species 24 



Left ramus of mandible with Ma and Ms (Y.P.M. No. 14702), type 

 specimen, occlusal and lateral views. 4 X natural size. Bitter Creek, 

 Washakie Basin, Wyoming. 



Fig. 3. Esthonyx, cf . acutidens Cope 42 



Right ramus of mandible with Dp* to Ma (U.S.N.M. No. 22124), oc- 

 clusal and lateral views. ij4 X natural size. New Fork, Green River 

 Basin, Wyoming. 



Fig. 4. Palaeictops pineyensis (Gazin) 22 



Right ramus of mandible with Ps (U.S.N.M, No. 22123), occlusal and 

 lateral views. 4 X natural size. La Barge, Green River Basin, 

 Wyoming. 



