C/q SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 128 



Plate 13 



Protylopiis? annectens Peterson: i, 2, Skull (U.S.N.M. No. 20263), lateral 

 and ventral views. 3, Skull (U.S.N.M. No. 20261), ventral view. Natural 

 size. Myton pocket, Uinta Basin, Utah. 



Plate 14 



Protylopus? annectens Peterson: i, Right maxilla (U.S.N.M. No. 20290), oc- 

 clusal view. Approximately one and one-half times natural size. 2, Left 

 maxilla (U.S.N.M. No. 20275), occlusal view. Approximately one and 

 one-half times natural size. 3, Left ramus of mandible (U.S.N.M. No. 

 20149), occlusal and lateral views. Natural size. Myton pocket, Uinta 

 Basin, Utah. 



Plate 15 



Figs. I, 2. Oromeryx plicatus Marsh: i. Right upper molars and P* (Y.P.M. 

 No. 14571), type specimen, occlusal view. Approximately three times natu- 

 ral size. 2, Left M^ and M^ (Y.P.M. No. 14571), type specimen, occlusal 

 view. Approximately two times natural size. Uinta Basin, Utah. 



Fig. 3. Poebrodon kayi, new genus and species : Left maxilla (U.S.N.M. No. 

 20393), type specimen, occlusal view. Approximately three times natural 

 size. Myton pocket, Uinta Basin, Utah. 



Figs. 4, 5. Cf. Oromeryx plicatus Marsh: 4, Left ramus of mandible (U.S.N.M. 

 No. 20391), occlusal and lateral views. 5, Right ramus of mandible 

 (U.S.N.M. No. 20391), occlusal view. Approximately two times natural 

 size. White River pocket, Uinta Basin, Utah. 



Plate 16 



Malaquijerus tourfcloti, new genus and species: Skull (U.S.N.M. No. 20558), 

 type specimen, ventral view. Approximately two times natural size. Upper 

 Eocene of Dry Creek, Wind River Basin, Wyoming. 



Plate 17 



Fig. I. Lcptotragulus clarki, new species : Right ramus of mandible (U.S.N.M. 

 No. 20378), type specimen, occlusal and lateral views. Approximately one 

 and one-half times natural size. Myton pocket, Uinta Basin, Utah. 



Figs. 2, 3. Leptotragulus mcdiits Peterson: 2, Left maxilla (U.S.N.M. No. 

 16549), occlusal view. Approximately three times natural size. Myton 

 pocket, Uinta Basin, Utah. 3, Right ramus of mandible (U.S.N.M. No. 

 20361), occlusal and lateral views. Approximately two times natural size. 

 Myton pocket, Uinta Basin, Utah. 



Plate 18 



Fig. I. Leptotragulus proavus Scott and Osborn: Left ramus of mandible (P.U. 



No. 11501), type specimen, occlusal and lateral views. Approximately 



three times natural size. Uinta Basin, Utah. 

 Fig. 2. Leptoreodon marshi Wortman: Left ramus of mandible (U.S.N.M. 



No. 20397), occlusal and lateral views. Approximately three times natural 



size. White River pocket, Uinta Basin, Utah. 



