312 



Annals of the Carnegie Museum. 



Dolichorhinus longiceps sp. nov. 



(Plate XIII, Fig. 2; Plates XIV and XV.) 

 ( No. 2347 Carnegie Museum Catalog of Vertebrate Fossils. ) 



From the lowest level at which fossils were found in horizon "B" 

 of the Uinta, about 700 feet below the bottom of the Uinta red beds 

 (horizon "C"), about one and one-half miles east of Well No. 2, 

 Uinta Basin, Utah. 



This skull in general outline is very much like that of Dolichorhinus 

 hyognathus, though broader. In describing it I prefer to point out 



Fig. 8. Superior View of Skull of D. longiceps Douglass. [\ nat. size.) 



the characters which distinguish it from that species. Apparently it 

 is somewhat broader proportionally than that of D. hyognathus. The 

 skull is somewhat crushed, but it evidently was not flattened on top. 

 The present specimen had no heavy protuberances or horn-cores, 

 though there may have been the slightest beginning of such. There is 

 a rather narrow shelf, or lateral expansion of the malars, with rounded 

 outer borders, beneath the anterior portion of the orbit, but it is not 

 like the infraorbital process of D. hyognathus. The postorbital hook 

 does not appear to have been long or prominent. Evidently the zygo- 

 matic arches extend laterally outward more than in the last-named 

 species; the postglenoid processes are 'not nearly so heavy; the 

 palate is broader ; the top of the cranium, though there is no zygo- 

 matic arch, becomes narrower anterior to the crest of the occciput. 



The teeth are very similar to those of Dolichorhinus heterodon, so 

 much so, that, if only the teeth were known, they might be referred 

 to that species. They, as well as the skull, are larger. 



