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67 

 UINTA SELENODONTS 



Cope's keen observation, and as helping to unify the American selenodonts. 

 The oreodonts have already become established as a distinct family in Uinta 

 times, and not until we find their Bridger ancestors shall we be able definitely 

 to fix their taxonomic position. 



Camelomeryx Scott. 

 Plate III., Figures 15-1S. 

 Proc. Amer. Phil. Soc, xxxvii. , p. 77. 



This genus is very much like Leptoreodoti, though it should, in my judg- 

 ment, be separated from it. The type of the genus is a fairly well preserved 

 skull without the mandible (Princeton Museum, No. 11,226), and I provision- 

 ally refer to it a specimen in the American Museum (No. 2070), which consists 

 of a cranium without teeth, ulna, radius, manus, pes, and other bones. The 

 latter may, perhaps, be referable to Oromeryx, though the published accounts 

 of that genus are so vague as in the absence of teeth to render identification 

 well-nigh impossible. 



The dentition (Plate III., fig. 16) is of the same type as that of Leptoreodon, 

 from which it differs only in minor points. The formula is : I ?-, C-, P^, MA 



The upper incisors are small and apparently only two in number; they 

 are separated from each other by a short space, and quite a diastema inter- 

 venes between the lateral incisor and the canine. The crowns are very small, 

 antero-posteriorly compressed, and somewhat chisel-shaped, resembling those 

 of Leptoreodon marshi, but not the conical crowns of L. gracilis. The very 

 small amount of wear which the incisors have undergone, in comparison with 

 the other teeth, indicates that they were of little functional importance to the 

 animal. 



The canine is of rather peculiar form ; its crown is not very long, but is 

 quite broad antero-posteriorly, and, though compressed, is thick transversely ; 

 the edges are sharp and the end very bluntly pointed. What little abrasion 

 the crown shows is upon the posterior surface, from which we may infer that, 

 as in Leptoreodon, p T had become caniniform, and that the lower canine had 

 gone over to the series of incisors. This tooth is smaller than that of Lep- 

 toreodon, its fore-and-aft breadth being especially shorter, and it has not the 

 thickened anterior border and external grooving which characterize the latter 

 genus. 



The first premolar follows the canine after a short interval, and is sepa- 

 rated from p- ? by a considerable diastema ; it has a small, simple, conical, and 



