VIII. OSTEOLOGY OF OXYDACTYLUS. 



A New Genus of Camels from the Loup Fork of Nebraska, 

 WITH Descriptions of Two New Species. 



By O. a. Peterson. 



The material upon which the present paper is based, was collected 

 by the writer during the season of 1901 from the upper Loup Fork 

 sediment near the source of the Niobrara River, locally known as the 

 Running Water, in Sioux County, Nebraska. After a careful study 

 of this material the present writer is of the opinion that a new genus 

 and at least two new species are represented. 



Oxydactylus longipes, gen. et sp. nov. 



The type (No. 918;' of this new genus and species consists of the 

 skull, lower jaws, complete cervical region, five dorsals, and a (ew 

 ribs, four lumbars, the sacrum and pelvis, the right scapula, proximal 

 end of the ulna and radius, the unciform, magnum, and second row 

 of phalanges, the right femur and distal end of the left femur, both 

 tibiffi and the hind feet practically complete. I have selected as the 

 cotype a second skeleton (No. 886) which pertains to a somewhat 

 smaller individual, but evidently belonging to the same species. It 

 was found in the same geological horizon and at the same locality and 

 consists of the following material : Skull, lower jaws, atlas, axis, four 

 lumbars, sacrum, and pelvis. Excepting the scapula the fore and hind 

 limbs are well represented. 



In addition to these two skeletons, which supplement one another 

 in an admirable manner, there were found, in the same locality, a 

 number of other skulls associated with more or less skeletal material 

 and pertaining to the same species. In the following detailed de- 

 scription of the osteology of Oxydactylus longipes this supplementary 

 material will be used whenever it throws additional light on the sub- 

 ject, but in all such instances references will be made to the catalogue 

 numbers of the various parts referred to. 



' Nos. refer to the Catalogue of the Section of Paleontology in the Carnegie 

 Museum. 



434 



