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WATER-BUCK 143

brown in colour, Azppotragus niger; and the allied
species 7. eguznus, the roan antelope. The graceful
gazelles have white cheeks as a rule, with a brownish
line extending from the eye to the muzzle. Many of
them have lyrate horns ringed for nearly the whole
of their length, and oval in section. The little dorcas
gazelle, Gagella dorcas, was described by Aélian. Its
range extends all along Northern Africa into Asia
Minor. The springbok, G. euchore, is exclusively
South African, and migrates in millions from feeding
ground to feeding ground. Besides the Indian species,
G. Bennetti, often spoken of as the ravine-deer, there
are three other Asiatic gazelles, one of them in Tibet
at a height of 18,000 feet. Round Kilima-njaro ranges
Grant’s gazelle ; in Masailand is Thomson’s gazelle ; in
Somaliland is Soemmerring’s gazelle, with somewhat
heavier horns than the others. In Somaliland there
lives the dibatag, which is an intermediate form
between the gazelles and the long-necked gerenuk.
In Western Asia lives the ugly saiga, with the
bloated nose, and in South Africa the graceful pala
with the lyrate horns, and the somewhat bulky water-
buck, known to all the shooters of big game. The
black-buck of the Indian sportsman is the only
species now left in the once extensive genus Anézlope,
from which is derived the familiar name.

The smallest of the group, and, in fact, the smallest
of the ruminants, is Vanotragus pygmaeus, one of the
steinboks, the ‘royal antelope’ of Western Equatorial
Africa, which is rarely over a foot high, and therefore
slightly smaller than the tiny Salt’s antelope of the
Red Sea Coast, or Kirk's antelope of further south,