Algazal, and in Arabia by the small white oryx (0.
The true oryx of classical writers was probably the East and North-east African beisa-oryx (Oryx beisa), which is replaced in South Africa by the gemsbuck (oryx gazella).
Still larger are the elands, of which the typical Taurotragus oryx of the Cape is uniformly sandycoloured, although stripes appear in the more northern T.
The sable and roan antelopes are distinguished from Oryx by the stout and thickly ringed horns rising vertically from a ridge over the eyes at an obtuse angle to the plane of the lower part of the face, and then sweeping backwards in a bold curve.
Beatrix) the horns are straight, but in the North African white oryx or algazel (0.
The structure of their molar teeth affiliates them to the antelopes of the Oryx and Hippotragus groups; but the early bovines lack horns in the female, whereas both sexes of these antelopes are horned.
The larger antelopes, so common on the African side of the Gulf of Aden, are not found, except one variety, the Oryx beatrix (called by the Arabs, wild cow), which is an inhabitant of the Nafud between Tema and Hail; it is about the size of a donkey, white, and with long straight horns.
The various species of oryx differ from Hippotragus by the absence of the white eye-tufts, and by the horns sloping backwards in the plane of the face.