196 University of California Publications in Geology. [Vol. 6 



process in the center of the left lateral aspect (fig. 5d) is de- 

 veloped to a degree more nearly that of the prong-horn. The 

 anterior fossa is nearer to Ilingoceros. 



SUMMARY 



The hypsodont teeth of the species represented by the ma- 

 terial here discussed, as well as most of the characters of its 

 metapodials, phalanges, and the astragalus, show that it should 

 be placed with the antelopes. 



The long-crowned teeth of Capromeryx(t) minor separate it 

 from the true antelopes, even including the light-limbed African 

 gazelles. The relatively long and light character of those limb- 

 bones which have thus far been discovered is sufficient to separate 

 the new species from most of the true antelopes (Antilopinae 

 and Rupieaprinae) . Its hypsodont teeth serve to separate it 

 from the Tragulidae, the teeth of which are braehyodont. 



Two facts indicate that the new species should not be referred 

 t<> Ilingoceros, Sphenoplialos, or Neotragocerus : first, the animal 

 is smaller than those forms, and second, it occurs in deposits 

 of a later geologic age. Ilingoceros, Sphenophalos, and Neo- 

 tragocerus come from beds regarded as Lower Pliocene, the two 

 first-named from Thousand Creek, Nevada, and the last-named 

 from the Neotragocerus Zone of the Snake Creek deposits of 

 western Nebraska. The composition of the Rancho La Brea 

 fauna indicates that it is not earlier than Pleistocene. 



Analogy with Recent artiodactyls such as Cervus, Antilo- 

 capra, Odocoileus as regards geographical range of individual 

 species, together with probable minor variations from Capro- 

 meryx furcifer in size and tooth characters, lead to the con- 

 elusion that it is not referable to that species. 



As regards Matthew's suggestion that Capromeryx is prob- 

 ably a descendent of the primitive deer-antelope group of which 

 Blastomeryx and Merycodus are examples, the specialization 

 indicated being substantially the same in direction as that 

 exemplified by the prong-horn, it may be said that the characters 

 of the new form support such a view. 



