84 MOUNTAIN FAUNAS 
been said already as to the number of kinds of ungulates 
found in Tibet, the Himalayas, and adjacent regions. 
Though America has no true goat, there occurs in 
the Rocky Mountains a white ungulate, about the size 
of a large sheep, and apparently related to the serow, 
often called the Rocky Mountain goat. Its hair is very 
long, and the animal seems to be very resistant to cold, 
spending its time near the upper limit of the forest, 
although it also descends at times to sea-level. Nearer 
the antelopes than the goats is the chamois (Rupi- 
capra tragus), a rather clumsily built animal with short 
hooked horns, stumpy tail, and feet especially fitted 
for scrambling about rocks. It is widely but discon- 
tinuously distributed over the mountain regions of 
Europe, but is found fossil on the low ground also. 
Of the true antelopes many of the gazelles ascend to 
considerable elevations, notably the Tibetan gazelle 
(Gazella picticaudata), which ranges up to 18,000 feet, 
and is less shy than most gazelles. Tibet has also 
a peculiar antelope, the chiru (Pantholops hodgsoni), an 
animal in which the male has a curious swollen nose 
and long horns. This form occurs at the same heights 
as the gazelle, sometimes in very large herds. In the 
distended nose it somewhat resembles the saiga of the 
Siberian steppes. 
Of the vast number of African antelopes some 
frequent hill regions, notably the rhebok (Pelea cap- 
reola) of the south and east, which has the habits of 
a chamois. Another agile and chamois-like African 
form is the klipspringer (Oreotragus saltator), found at 
heights up to 8,000 or 9,000 feet in Abyssinia, and 
having very small feet, which apparently give it 
great sureness on the rocks. Both its Dutch and Latin 
names refer to its jumping powers. 
