EXPLANATION OF PLATE XXV. 



UiNTATiiEniCM ROBUSTUM. All the Specimens discovered by Drs. Corson and Carter at Dry 

 Creek Canon. Natural size, excei)t Figs. 8 and 11, which are one-half size. 



Figs. 1-5. A supposed upper canine tooth. Discovered by Dr. Corson in comj)any with a fragment of the 

 same tooth of the other side, the specimen reprcsente<l in Figs. 13, 14, and the molar of 

 Palajosyops represented in Fig. 13, Plate XXIII. Originally referred to a supposed car- 

 nivore, with the name of Uiniamastix atrox. 



Fig. 1. Outer view of the right canine. The restored outline of the lance-head-like point 

 is, perhaps, a little exaggerated. 



Fig. 2. Inner view of the point of the same specimen. 



Fig. 3. Front view. 



Fig. 4. Outline of a transverse section of the lance-head-'like point. 



Fig. 5. Outline of a section near tho base of the specimen. 



Figs. 6-12. Specimens found together, with portions of the skull and other boues of the skeletou, ten 

 miles distant from the former. Discovered by Drs. Carter and Corson. 

 Fig. 6. Inner view of tho last upper molar of the right side. 

 Fig. 7. View of the triturating surface of the same tooth. 



Fig. 8. Outer view of the same tooth inserted in a jaw-fragment, half the natural size. 

 Fig. 9. Inner view of the last lower molar of the right side. 

 Fig. 10. View of the triturating surface of the same tooth. 

 Fig. 11. Outer view of the lower-jaw fragment, containing tho same tooth, one-half tho 



natural size. 

 Fig. 12. Triturating surface, much worn, of the first upper molar, of tho right side. 



Figs. 13, 14. A supposed upper jiremolar of the same animal. Discovered by Dr. Corson in company with 

 the large canine tooth of Figs. 1-5. 

 Fig. 13. Inner view of the tooth. 

 Fig. 14. Triturating surface. 



