63 G THE WASATCH AND BETDGER FAUN^. 



The pieces which represent this species in my collection include the 

 entire skeleton with the exception of the pelvis. They have been already 

 mentioned in the course of the description of the genus. They are suffici- 

 ently numerous to furnish a good basis for a complete restoration. The 

 skull is somewhat distorted by pressure, and some of the long bones are 

 more or less crashed. In general, the condition of the specimens is good. 



The form of the skull is not unlike that of a fox. It is elongate, with 

 the orbit median in position, and the muzzle compressed. The profile is 

 nearly horizontal from the end of the nasal bones to the summit of the occi- 

 put, allowing a little convexity for the sagittal crest. The nasal bones pro- 

 ject to a point exactly above the anterior border of the premaxillary bone, 

 and the border of the nostril extends as far posteriorly as a point above the 

 posterior border of the canine tooth. The orbit is of medium size, and its 

 anterior border is above the middle of the first true molar. The slight 

 angle of the inner superior border of the malar is a little behind a point 

 above the posterior border of the last molar. The postorbital process is 

 acuminate and quite elongate. Its posterior borders -pass into the anterior 

 temporal ridges, and these soon unite to form a moderately elevated sa- 

 gittal crest. The latter is quite prominent posteriorly owing to the decurva- 

 ture of the brain-case. The lateral occipital crests ai'e prominent and con- 

 vex, giving a cordate outline when viewed from above. They contract 

 above the mastoid region, and continue to the extremity of the paroccipital 

 process, and send a branch forwards to the squamosal process of the z3^goma, 

 the latter ridge not being prominent. The occiput is concave on each side 

 above each occipital condyle. The paroccipital process is narrow and fee- 

 ble, and is separated from the posttympanic by a space as wide as the width 

 of the meatus auditorius externus, which is considerably wider than the cor- 

 responding space in H. craspeclotum. In that species, the two processes are 

 in contact at the base. The postglenoid processes are short and pyramidal 

 in form; less prominent than in H. craspeclotum. The glenoid facet is per- 

 fectly flat, and has a longer diagonal-longitudinal than transverse diameter. 

 The inner border is sharply defined from the surface which leads to the 

 foramen lacerum anterius, but there is no rugose band at this point as in H. 

 craspeclotum. The basioccipital and basisphenoid bones are strongly convex 



