lOO Bulletin American Museum of Natural History. [Vol. X, 



that it supported a very considerable vestige of the first digit. It 

 would not indeed be a matter of surprise to find this digit com- 

 plete in more perfect specimens very much as in Oreodon. 



There are four metacarpals preserved of which the median 

 ones, Mt. Ill and IV, are the largest andsubequal in size. Mt. II 

 is slightly larger and longer than Mt. V, and in all of them the 

 distal keels are confined to the pahiiar surfaces, as in all primitive 

 Ungulates. The phalanges of the fore feet are not known. 



Of the hind limb the materials are not so complete as of the 

 fore limb, but enough is preserved to make out its more important 

 characters. The fibula was much reduced, and probably incom- 

 plete in the middle part of the shaft. The distal end of the 

 tibia displays no usual form of the more generalized Selenodonts, 

 as do the tarsal bones. The cuboid and navicular were not 

 coossified, and there is evidence of four complete metapodials, 

 the lateral ones, however, being unusually slender and delicate. 

 The first two phalanges resemble those of the early Cameloids, 

 Protoccros and Leptomeryx in their form, as do likewise the 

 unguals in being relatively high-pointed and flattened upon their 

 opposed surfaces. 



Bunomeryx elegans, sp. nov. 



A second species of this genus is indicated in the collection by 

 a portion of a cranium containing the last three premolars and 

 the molars, in excellent preservation, together with both mandibu- 

 lar rami bearing all of the teeth with 

 -r.., pi p,s pi, the exception of the incisors and 



canines. 



The most important difference be- 

 tween the two species is seen in the 

 presence of a short diastema between 

 premolars two and three of the lower 

 jaw in B. elegans. In B. man tan us 

 this diastema is absent, and the teeth 

 of the lower jaw were apparently in 

 a continuous series or closed row. B. elegans is smaller and more 

 delicate than B. montanus, a fact that is not only indicated by all 

 the teeth but particularly emphasized by the fourth inferior pre- 



f^g. 



Pig. 2. Crown view of upper 

 and lower teeth of Bunomeryx 

 elegans. /ty.^ hypocone ; /r., pro- 

 tocone ; //., protoconule. 



