78 SCOTT — ox THE SELENODONT ARTIODACTYLS. [March 18, 



resembling those of the preceding genus, but molars with larger ex- 

 ternal buttresses. Forehead broad and short, sagittal crest long; 

 temporal ridges confined to frontals. Posterior nares farther back 

 than in Merycodesmus and palatal notches absent. 



In this genus the superior dentition is, except in the character of 

 the incisors, very similar to that of Merycodesmus, but the shape of 

 the forehead, the cranium and the hinder part of the palate are 

 very different. In the absence of the lower jaw, it is not prac- 

 ticable to determine finally whether this form is congeneric with 

 LeptotraguluSy but the character of the upper premolars leads me 

 to believe that it will prove to be quite distinct. 



Cameloitteryx longiceps, sp. no v. 



Size, small ; cranium long and slender ; orbits small and widely 

 open behind ; postorbital processes of frontals extended trans- 

 versely, but little decurved. 



Measuremejits. 



Upper dentition, length I i to M 3 0.062 



canine, ant. -post, diameter 005 



canine, transverse diameter 003 



premolar-molar series, length 051 



^' premolar series, length 029 



*' molar series, length 021 



'' M I, length 0055 



'^ M I, width 0075 



" M 2, length 007 



'' M 2, width 010 



" M 3, length 0085 



M 3, width 01 15 



n 

 li 



cc 



That Came/omeryx and Merycodes77ius are nearly allied genera 

 will be at once apparent from the foregoing description. Whether 

 the former is the ancestor of some White River genus, such as 

 Hypei'traguliis, or whether it is a mere variant of Merycodesmus 

 and without permanent phylogenetic significance, must await the 

 decision of more complete material. 



Oromeryx Marsh. 



Orome?yx Marsh, Amer. Journ. Sci., third series, Vol. xiv, p. 

 364 {ii077ien 7iuduf7i), 



