Height at withers about 46 inches. Colour of neck and body a tolerably uniform tawny. Head and throat with the same ornamentation of black stripes and patches as in the preceding species, but the nose-patch does not spread so far laterally, and does not fuse with the lower extremity of the stripe that runs from the eye; this stripe also stops short at a point about on a level with the corner of the mouth, and is not produced inferiorly on to the lower side of the jaw; thus the whitish muzzle is not surrounded by a complete black ring as is the case in _O. gazella_, and there is less black on the inter-ramal area and on the upper end of the throat. Hair of throat not produced to form a mane or beard. Ears black at tip and on rim as in _O. gazella_. Black spinal stripe more sharply defined than in that species and extending from a point near the middle of the rump; hind-quarters of the same colour as the body and neck, there being no black patch on the rump and none on the lower half of the thighs. The black stripe that passes backwards from the chest along the side of the body above the white belly is narrower than in _O. gazella_, and is not continued on to the thighs. Hind legs whitish, not black above the hocks, and without a black spot on front of the cannon-bone, but stained with black above the false hoofs and below the hocks. Fore legs whitish, banded as in _O. gazella_, but the stripe above the knee narrower and only extending about halfway up to the shoulder on the outer side, and to the chest on the inner. Tail-tuft black. Hairs along the neck and spine lying forwards, the parting situated on the rump. Horns nearly straight, ribbed in their basal half; about 36 or 37 inches in length, often only about 30. A skull gives the following measurements:—Basal length 14 inches, orbit to nose 12·75, greatest width 5·75. _Female._ Similar to the male, but horns rather longer and thinner. _Hab._ Western shores of the Red Sea from Suakin southwards to Danakilland; Somaliland and British East Africa north of the Tana.