TABLE Xni. 



REMAINS OF AECH/EOTIIEEIUM AND ORJiODON, FROM THE EOCENE TERTIARY OF NEBRASKA. 



The figures are iUI of ihc natural size. 



Tab. XIII., Fig. 1. Distal extremity of an os huinevi, viewed anteriorly. 



" Fig. "2. The same specimen as Fig. 1, articulated with the radius and ulna, viewed internally. 



None of the specimens of long bones in the collection, were found in imrnediate connexion with 

 • the fragments of crania, so that I am not able to ascertain with certainty to what species those 



^ _ ' represented belong. The humerus of Figs. 1 and 2 is about the same size as the corresponding por- 

 tion of that of Cervus Virginianus; the radius is in a trifling degree larger, but the ulna is relatively 

 ' much better developed. The relative size of the three bones agrees better with the Suiline animals 



■ ' than with Ruminants, and they may probably belong to Archasotlierium Mortoni. 



" Fig. 3. Fragment of the left side of the lower jaw of Oreodon Culbertsonii, viewed from above, and exhibiting 



the true molars and the posterior two prernolars, with their crowns very much worn. 

 " Fig. 4. Fragment of the lower jaw of Oreodon Culbertsonii, exhibiting the triturating surfaces of the last two 

 molars. 



Figs. -5, 6. Fragment of the right side oi' the lower jaw of Oreodon gracilis, containing the last two molars, and 

 half of that in advance. 

 " Fig. 5. External view of the specimen. 

 " Fig. 6. View of the trittirating surfaces of the teeth. 



