The British Museum contains a fine adult mounted male of this Antelope, from the Tunisian Sahara, lately presented by Mr. J. I. S. Whitaker; a front and horns from the Algerian Sahara, presented by Mr. Rowland Ward, F.Z.S.; a pair of horns brought home from Central Africa by Denham and Clapperton; and the specimen, formerly in Bullock’s Museum, upon which de Blainville partly based his _Antilope naso-maculata_, and Hamilton Smith his _A. mytilopes_; besides other older specimens without exact localities. _May,_ 1899. Subfamily VII. _TRAGELAPHINÆ_. _General and Colour Characters._—Medium-sized or large bovine Antelopes, typically, but not invariably, marked with transverse white stripes on the body, a pair of white spots on the cheeks, a white stripe running inwards and downwards from the corner of the eye to form an incomplete v-shaped mark on the upper half of the nose, a large transverse white patch at the upper and another at the lower extremity of the throat, and a pair of white spots on the front of the pasterns, which are black or brown behind. The belly is never white, and often darker than the sides of the body. The typical colour, as exemplified in the females and young males, is tawny, fawn, or reddish brown; but the adult males often assume a deep brown or slaty hue, and differ strikingly from the females. Horns generally present only in the male; arising just behind the orbit; usually spirally twisted, and always furnished at the base in front with a longitudinal ridge, which generally curves outwards from the base of the horn. Skull without anteorbital pits, but with large or small lachrymal vacuities, and usually with large pits on the frontal bones at the apertures of the supraorbital foramina. Muzzle large and naked. Mammæ 4. _Range of the Subfamily._ Peninsular India and Africa south of the Sahara. The genera of this subfamily may be tabulated as follows:— _a._ Hind limbs shorter than fore limbs, so that the withers stand higher than the hind-quarters. Head flatter behind the ears, the parietals and frontals lying almost in the same plane. Horns present in the male only, shorter than the face, not twisted 1. Boselaphus. _b_. Hind and fore limbs subequal in length, withers not appreciably higher than hind-quarters. Cranium more convex longitudinally. Horns longer than the face, spirally twisted. _a1._ Horns present only in the male, inserted just behind eye and rising so as to form an obtuse angle with the plane of the face. _a2._ Horns flat behind at the base, with a strong external basal ridge and rarely more than two complete turns. _a3._ Hoofs normal, short; back of the pasterns covered with hair. 2. Tragelaphus. _b3._ Hoofs exceedingly long; back of the pasterns naked. 3. Limnotragus. _b2._ Horns rounded behind at the base, without external basal ridge, forming an open corkscrew spiral, with three complete turns. 4. Strepsiceros.