_Gazella spekei_, =Blyth=, Cat. Mamm. Mus. As. Soc. p. 172 (1863); =Blanf.= Zool. Abyss. p. 261, pl. i. fig. 5 (horns) (1870); =Brooke=, P. Z. S. 1873, p. 543; =Kohl=, Ann. Mus. Wien, i. p. 77, pls. iii., iv. fig. 3, & v. fig. 1 (animal & skull) (1886); =Thos.= P. Z. S. 1891, p. 210; =W. Scl.= Cat. Mamm. Calc. Mus. ii. p. 158 (1891); Scl. P. Z. S. 1892, pp. 100 & 118; =Swayne=, P. Z. S. 1892, p. 306; =Ward=, Horn Meas. (1) p. 112 (1892), (2) p. 153 (1896); Lyd. Horns and Hoofs, p. 234 (1893); =Swayne=, Somaliland, p. 316 (fig., head) (1895); =Hoyos=, Aulihan, p. 179, pl. x. fig. 3 (1895); =Elliot=, Publ. Chicago Mus., Zool. i. p. 120 (1897); Scl. P. Z. S. 1897, p. 920 (fig., head). _Gazella_, sp. inc., =Lort Phillips=, P. Z. S. 1885, p. 932. _Gazella naso_, =Scl.= P. Z. S. 1886, p. 504, pl. li. (head); =id.= in James’s Unknown Horn of Africa, p. 268, pl. iii. (1888). VERNACULAR NAME:--_Dhero_ of Somalis (_Swayne_). Size slightly greater than in _G. dorcas_; height at withers 23–24 inches. Body pale brownish fawn, the light lateral band but little paler than the back, then dark or dull blackish, not sharply defined. Central facial band brownish fawn; top of muzzle, over nasal bones, with a distinct blackish patch, in front of which there is a peculiar swollen and corrugated cushion of skin raised up above the level of the face, and extensible at the pleasure of the animal. Dark cheek-band narrow, indistinct, the light band above it broad and extending to the muzzle. Ears long, narrow, pointed, their backs whitish fawn. Knee-tufts present, brownish fawn. Pygal band very indistinct. Skull with short broad nasals, the premaxillæ not or barely touching their outer corners. Basal length in an old male 6·5 inches, greatest breadth 3·35, muzzle to orbit 3·6. Horns but slightly divergent, evenly and strongly curved backwards for three-fourths their length, their tips gently recurved upwards. _Female._ Like the male, but the horns slender, little ridged, less curved, about three-fourths the length of those of the male. _Hab._ Interior Plateau of Somaliland. There can be no doubt that the two Gazelles which inhabit the maritime plain and the high inland plateau of Somaliland respectively, although they are closely allied, and have been confused together by some writers, belong to distinct species, distinguishable by well-marked characters. The Gazelle of the interior plateau, which we treat of first, when compared with that of the coast-land is at once recognizable by the generally browner colour, the darker lateral band, the black nose-spot, and above all by the wrinkled and elevated nose of the adult, which is not met with in the sister species.