OREAMNUS. 



nasals narrow, flat: interparietal with nearly straight anterior out- 

 line; basisphenoid and presphenoid narrow, contracted; palate wide. 

 Horns spreading outward from base, turning backwards at tips, 

 ribbed for half their length, then smooth for remaining portion. 



Color. *White. Horns brownish black on ribbed part, black on 

 smooth portion. 



Skull. Superior outline highest between horn cores, descending 

 rapidly with a concave curve anteriorly to end of frontals, and pos- 

 teriorly with a convex curve to occiput; nasals flat on top, rounded 

 at posterior end, and terminating in a point anteriorly, and widest 

 about midway their length. The horn cores are concave, "scooped 

 out," on the inside, not rounded, and the points incline outward, 

 causing the exterior lateral outline to be slightly curved and per- 

 mitting the wide expanse that exists at the tips of the horns. 

 Tile malar is long and narrow and terminates anteriorly in a some- 

 what lengthened point, while the lacrymal is rather wide for its 

 length. The parietals are considerably depressed at the posterior 

 base of the liorn cores, and the interparietal is rounded anteriorly, 

 entireh' without the central point so conspicuous in the same bone 

 of the Rocky Mountain goat skull. On the inferior surface of the 

 skull the basioccipital is almost square, slightly contracted midway. 

 The wall of the foramen magnum between the occipital condyles has 

 been cut away. The .basisphenoid is greatly contracted and very 

 narrow for most of its length, and the visible portion of the pre- 

 sphenoid terminates almost in a point. The ptergoid fossa is wide for 

 its entire length, broadest between the hamular processes. Palate 

 very broad for its lent;th, and the palatal arch has a blunt median 

 azygos process. 



The mandible has a broad, flat condj'le, a rounded angle pro- 

 jecting outward nearly on a line with outer edge of condyle; horizoc- 

 tal portion slender, with only a slight curve to the inferior outline. 

 Coronoid process long, narrow, curving gradually backwards. 



.\[ftjsiiiem(7its. Occipito-nasal lengths, 273 mm.; foramen mag- 

 num to anterior end of premaxillaries, 243; interorbital width, 75; 

 length of frontal, 82; of nasals, gg; greatest width of nasals, 30; 

 mastoid breadth, 79; zygomatic width, 102; width of palate between 

 second molars, 46; length of incisive foramina, 40; length of horn 

 core, 74. 



Horns. Commence to curve outward from the base, turning back- 

 wards at the tips, strongly ribbed for half their length, and smooth 

 for the remaining portion. Total length along curve. 244: around 

 base, 108; tip to tip, 303. 



* Scalp was on the skull. 



