. Bulletin - United States National Museum. Science. MAMMALS OF THE MEXICAN BOUNDARY. 195. 3.—ODOCOILEUS HEMIONUS CAMS. EL PASO, TEXAS. (Cat. No. 63144, ) white. A large ovate spot, occupying nearly (lie whole forehead, i- dusky from a liberal admixture of black hairs; along its outer border this spot becomes nearly black. There is a black area adjoining the nasal pad, which is pro- longed backward along the upper lip. becom- ing obsolete at the an- gle of the mouth and indistinct across the lower jaw. Tufts of yellowish brown hair mark the places where the horns are to appear. The out
. Bulletin - United States National Museum. Science. MAMMALS OF THE MEXICAN BOUNDARY. 195. 3.—ODOCOILEUS HEMIONUS CAMS. EL PASO, TEXAS. (Cat. No. 63144, ) white. A large ovate spot, occupying nearly (lie whole forehead, i- dusky from a liberal admixture of black hairs; along its outer border this spot becomes nearly black. There is a black area adjoining the nasal pad, which is pro- longed backward along the upper lip. becom- ing obsolete at the an- gle of the mouth and indistinct across the lower jaw. Tufts of yellowish brown hair mark the places where the horns are to appear. The outer surface of the ears is blackish along the border terminally: there is a dusky spot on lower border of inside of the ear and a blackish spot between the ears. The chest and breast are dark fuliginous. Abdomen, inguinal region, buttocks, and basal portion of tail pure white. The animal was molting and the white spots rapidly disap- pearing. Hunters informed me that the spotted coat in fawns of the mule deer lasts but a few weeks. Skull and teeth.—Com- pared with the white-tailed deer of the Odocoileus americanus group, which includes (). texanus and 0. couesi of the present work, skulls of the members of the mule-deer group have tin' brain-case low and flat- tened (fig. •_>:',). The pos- terior facets of the occipital condyles are concave in- ternally instead of straight or convex. The lachrymal fossa is large and very deep. The vomer is fused to the basisphenoid instead of hanging free (fig. L9a). The |tremaxillary very rarely articulates with the nasal bone, being intercepted by a broad process of the maxilla. The mandibular ramus is more nearly vertical. The lateral teeth ( Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States.
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