The American Antelope 13 
epidermal horns which, however, are branched and shed an 
nually, and are replaced by fresh ones formed on the horn-core 
underneath the old horns. In other respects closely resembling 
the Bovidce. 
Genus ANTILOCAPRA. (Lat. antilope, antelope, and capra, goat.) 
Antilocapra Ord, Journ. de Phys., vol. 87, p. 149 (18 18). Type, 
A. americana. 
Revision, Lyon, Proc. U. S. Nat. Miis., xxxiv., pp. 393-402 
(1908). 
Horns compressed at base ; flattened process in front ; lateral hoofs 
absent; hair stiff, coarse, brittle; tail very short; horns in the 
female rudimentary or absent. Dentition, i. f; c. ^; p. |; 
m. f X2 =32. 
This genus, the only one of the family, contains but a single species, 
the American Antelope or Pronghorn, though Merriam has recently 
separated the southern form from Northern Mexico and Lower 
California as a distinct subspecies. 
Antilocapra americana {americana, American). 
American Antelope or Pronghorn. 
Antilocapra americana Ord, in GiUh. Geog.^ 2d Amer. ed., ii., 
p. 292 (1815). 
Measurements. — Total length, 50 ; tail vert., 7 ; height at shoulders, 
36; weight about 100 lbs. This is for the male, females being 
somewhat smaller. The horns are 12 ins. or less in length. The 
record is 17!^ and 17I for the left and right horns respectively, 
measured around the curve (E. S. Dodge, Arizona). 
Description. — Upper parts and sides yellowish brown; band 
between eyes covering forehead, nose, and a spot below ear liver- 
brown; sides of head, spot behind ear, throat, front of neck extend- 
ing in two triangles into the brown on either side, entire under parts 
and rump white; legs yellowish brown; hoofs, horns, and naked 
skin on nose black (Elliot). The animal has a large number 
of cutaneous glands, as follows: i postmandibular, i ischial, 
2 interdigital, i hock, present as pairs, and a median gland 
on the lower back, above the white patch of the rump. - 
Distribution. — The Pronghorn was formerly found throughout 
the plains country and the valleys and parks of the Rocky Moun- 
