554 THE PRONG-HORN ANTELOPE. 
Sub-family Wemorhedine includes two genera and ten species. They are goat-like Ante- 
lopes. The typical genus, Wemorhedus, has nine species in Asia. The other genus has but 
one species, the Rocky Mountain Goat (Aplocerus montanus), and is wholly confined to Amer- 
ica, and the narrow limits of the Rocky Mountains. This is a true Antelope, in all essential 
features and affinities, though having something of the aspect of the goat, from whence it 
derives its trivial name. 
AOUDAD.—Ammotragus tragdaphus. 
In some respects this creature resembles the chamois of the Alps. Its small re-curved 
horns are especially like those of the latter. Its nose is hairy and ovine in aspect. It has no 
muffle, and no tear-bag. ‘The under fur is short and woolly, and the outer fur is long and 
pendant. 
Next to the musk sheep this is the rarest of North American animals. It inhabits the 
most inaccessible cliffs of the Rocky Mountains. Only during the last ten years has it been 
taken. The extreme difficulty in recovering the body even if the hunter is successful in shoot- 
ing it, has hitherto proved insuperable. Its habits are entirely unobserved. The long and 
rugged pathway along which the hunter has to pass proves too fatiguing, and even now it is a 
rare animal in collections. The Central Park Museum has a fine example. The pelt of this is 
pure white. The horns and hoofs are jet black. 
ONE more sub-family, distinguished by being wholly American, and having one genus and 
one species only, is the Antilocaprine. 
The PRONG-HORN ANTELOPE (Antilocapra americana) is a familiar species to the visitor 
of the great Western plains. The title prong-horn relates to the small branch of the horn. 
About the time of the settlement of California it was very abundant on the great plains. Its 
favorite range is along the barren or naked plains, avoiding the timber lands, as it depends on 
its fleetness to escape from enemies. The eye of this creature is larger than that of any other 
