MAMMALS OF THE MEXICAN BOUNDARY. l73 



Sides of head ash gray, thickly aiiiiulated with whitish. Brows and 

 bristles about eyes all black; those about muzzle black and white. 

 Limbs reddish fawn, more or less mixed with gray and black ante- 

 riorly, whitish or pale fawn color posteriorly, and white around hoofs 

 and between toes. Hoofs plumbeous, horn color where worn off at 

 apex. The metatarsal gland, which measures 15 mm. in length, is 

 surrounded by a tuft of reversed hair, which is white in the middle, 

 bordered by dark brown. 



._ A young male, an old female, and a young female (Nos. 4-JS!). 

 4^90, and 4291, Mearns's collection) killed with the type Decciiiljer 

 25, 1897, and alf50 in full winter pelage, agree essentially in coloration 

 Avith the adult male described above, except that the ears and crown 

 t^f head are blacker, and the light annulations on the upper side 

 OT the tail nearly or quite wanting, leaving that part clear black. 



The summer coat, as usual, is reddish. 



Horns. — The horns of the type approach those of the Sonora deer, 

 Odocoileus couesi (Coues and Yarrow), in size and form. There 

 are two basal snags, one directed upward and backward (length 

 75 mm.) and one forward (length 37 mm.), with four additional 

 points to each horn, making twelve points in all. The length of 

 the beam, measured to end of anterior point, following the curves 

 of the horn, is 440 mm. The horns are symmetrical, their longest 

 points measuring 175 mm. in height. The beam is strongly curved 

 upward, forward, and inward, the tips of the anterior tines approach- 

 ing within 70 mm. of each other. The total expanse of the horns is 

 330 mm. ; the circumference of beam, at base, 80 mm. 



Measurements of type. — Length, measured from end of muzzle to 

 end of last caudal vertebra, 1,585 mm. ; tail vertebrae, 265 (to end of 

 hairs, 345); ear from crown, 160; ear from base of opening, 140; 

 girth of chest, 800; from tip of nose to angle of mouth, 90; to eye, 

 152 ; to center of pupil, 170 ; to base of ear, 225 ; to base of horn, 220 ; 

 to occiput, 280 ; diameter of eye, 26 ; fore limb, from coracoid process 

 of scapula to end of hoof, 700 ; from olecranon, 575 ; length of manus, 

 325; hind limb, from kneejoint to end of hoof, 625; length of pes, 

 430; height of animal at shoulder, 880; height at hips, 900; from 

 great trochanter to coracoid, 710. 



Cranial characters. — The skull in 0. texanus is narrow, with elon- 

 gate nasals. That of the type, an old male in which the permanent 

 premolars are considerably worn, presents the following measure- 

 ments: Basilar length (basion to front of premaxillary) , 244 mm.; 

 zygomatic breadth (across middle of orbits), 114; occipito-nasal 

 length. 208 ; least interorbital breadth, 71 ; greatest length of nasals, 

 8l ; greatest breadth of nasals, 31 ; least breadth of nasals, 18.5 ; 

 greatest diameter of orbit, 38 ; length of upper lateral tooth-row, 24. 



