In 1875 three examples of the subspecies (or variety) without the anterior horns were obtained by purchase. Several examples of this same form have been received of late years, but have not thriven in the Society’s Gardens. At the present time there is only a single female left in the Collection. Our figure of this Antelope (Plate XXIV.) was lithographed by Smit from a sketch of Mr. Wolf’s. It represents an adult male of the typical subspecies in two positions. _August, 1895._ FOOTNOTES: [1] Prepared (for the authors) by Mr. F. H. WATERHOUSE, Librarian to the Zoological Society of London. [2] The term _anteorbital gland_ denotes the so-called “tear-bag” which opens on the face of many Antelopes and Deer. The _lachrymal pits_ are placed in a depression of the skull below the orbit of the eye in the lachrymal bone, and contain the above-mentioned gland. The _lachrymal vacuity_ is a larger or smaller aperture between some of the component bones of the skull, situated near the lachrymal pit and at the base of the nasal bones, which form a thin roofing over the cavity of the nose. The term _supraorbital pits_ is applied to deep excavations in the forehead of the skull between the eyes, which lead into perforations traversing the thickness of the bone. The _molar teeth_ are the last three teeth on either side of each jaw. [3] These three measurements, when obtainable, will be given of the skull of every species throughout the work. The “basal length” is taken from the front lower edge of the large hole at the back of the skull, the _foramen magnum_, to the front of the muzzle, in a straight line; the other two explain themselves. The fourth and fifth measurements are only given in this genus to show the development of the frontal elongation. [4] These variations in curvature are probably mainly due to differences in age, the growth of the curved basal part of the horns giving at the various stages widely different directions to their tips.--S. & T. [5] See Mr. Ravenstein’s narrative of this journey, Pr. R. G. S. xiii. p. 193 (1891). [6] See “Routes and Districts in Southern Nyassaland,” by Lieut. B. L. Sclater, R.E., Geogr. Journ., Nov. 1893. [7] The following are the chief references to the Koba:-- _Le Koba_, Buff. Hist. Nat. xii. p. 210, but not p. 268, or the horn pl. xxxii. fig. 2. _Senegal Antelope_, Pennant, Syn. Mamm. p. 38 (1764) (name and locality, but not description or woodcut of head, which refer to _Bubalis caama_). _Antilope koba_, Erxl. Syst. R. A. p. 293 (1777) (name from Buffon, description from Pennant). _Antilope senegalensis_, G. Cuv. Dict. Sci. Nat. ii. p. 235 (1804) (name based on Pennant). [8] ‘Histoire Naturelle du Gnou, du Grand Gerbe et de l’Hippopotame.’ Amsterdam, 1776. [9] ‘Beschryving van een nieuw viervoetig Dier aan de Kaap de Goede Hoop geheeten: Boschbuffel en by de Hottentotten aldaar genaamd Gnou.’ Amsterdam, 1784.