Genus II. OUREBIA. 
Type. 
Ourebia, Laurill. Dict. Univ. dH. N.1i. p. 622 (18389) . . . . . . O. scoparia. 
Scopophorus, Gray, Ann. Mag. N. H. (1) xviii. p. 232 (1846) . . . O. scoparia. 
Size largest of the subfamily. Hoofs normal, triangular, pointed, the animal 
standing, as is usual, on the flattened lower side of the hoof, with the point 
directed forwards. Accessory hoofs present. A naked glandular patch below 
each ear, and tufts on the knees, present in all the species. Tail short, 
generally tufted with black. 
Anteorbital fossee of skull very large, their edges sharply ridged above and 
below. Anteorbital vacuities small. Nasal bones long. 
Horns about three-quarters the length of the skull, slanting backwards, 
slightly or heavily ridged basally, smooth at the tip, but the different species 
vary considerably in the amount of ridging on the horns. 
Distribution. Africa south of the Atlas. 
The members of this genus are remarkably uniform in character, and there 
are scarcely any characters of importance to distinguish from each other 
species so widely distant geographically as the Oribis of the Gambia, 
Abyssinia, Zambesia, and the Cape. 
The following are the groups into which they seem best to fall :— 
A. Horns comparatively slender and smooth, their basal two inches only 
slightly ridged. 
a. Tail markedly black, tufted. 
freiricay, 2. ee tlt tlw lt eC «CA OO. scoparia. 
beeteiesian . ww sel lw sl Ce SC. «CAD. OO. hastaia. 
é. Gambian. . . . . . 43. O. nigricaudata. 
6. Tail scarcely black- aed eae nian ae 44, O. montana. 
B. Horns thicker, heavily ridged for more than half ig length. 
45. O. haggardi. 
