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Genus II. ORYX. 
Type. 
Oryx, De Blainville, Bull. Soc. Philom. 1816, p.75 . . . . . . . QO. GAZELLA. 
Size medium or large. Tail with a long and thick terminal tuft. Hairs 
along the neck and spine with their points projecting towards the head, the 
parting being situated on the rump or behind the middle of the back. 
Skull with small lachrymal vacuities and of the same general structure as 
in Hippotraqus ; but the bases of the horns, instead of rising vertically above 
the eyes and forming an elevated forehead as in that genus, project straight 
backwards, continuing the line of the face and lying in the same plane as 
the nasal bones. 
Horns long, cylindrical, slender, straight, or with a gradual and gentle 
backward curvature, diverging at a very acute angle; ribbed in their basal 
half. 
Female with horns as in the male. 
Range of the Genus. Africa south of the Sahara, except in the west-coast 
woodland and Congo Basin; also Southern Arabia. 
The five species of the genus here recognized may be arranged as 
follows :— 
a. Horns, when fully developed, crescentically recurved throughout. Neck 
and part of the shoulder to the base of the fore leg of a ruddy-brown 
hue and strongly contrasted with the yellowish-white tint of the body. 
113. O. leucorya. 
6. Horns normally straight or nearly so. Neck of the same colour as the 
body. 
a’. Size smaller (height about 3 ft. at the withers). Legs, with the exception 
of the pasterns, which are white, of a nearly uniform brown colour 
both outside and inside; body of a nearly uniform dirty white; no 
black spinal stripe, and only a faint throat-stripe; tips and edges of 
ears white; nearly the whole of the cheek beneath the eye covered 
with a large brown or blackish patch continuous with the ocular 
VOL. IV. G 
