_Female._ Smaller than the male, and without the mat of hairs on the forehead; horns smaller and less divergent than in the male, but much more strongly twisted and crested than in the females of the other species. _Hab._ Senegal and the Gambia Colony. Just as the Kudu, which is spread over the greater part of southern and eastern Africa, has a smaller relative (the Lesser Kudu) confined to Somaliland, so the Eland, which has a still wider range, has a near, but quite distinct, ally in a limited part of western Africa. But in the latter case the ally is what is called a “representative form,” since the typical Eland does not occur in the same country, whereas in Somaliland both the Greater and Lesser Kudus are found together in one district. The discovery of the West-African Eland is due to the researches of the collector, J. Whitfield, who was employed by the thirteenth Earl of Derby to procure living specimens of the larger Antelopes and other animals for his celebrated Knowsley Menagerie. With this object Whitfield made several expeditions to the River Gambia, and on his return, in 1846, brought with him some horns of a large Antelope nearly resembling those of the South-African Eland, but “larger, longer, and much heavier.” In his expedition of 1847 Whitfield succeeded in procuring from the same district the upper part of the skull and horns of a male and the flat skins (unfortunately without heads or feet) of an adult male and female of this animal, of which the native name was said to be “_Gingi-ganga_.” It was upon these specimens that the late Dr. Gray, in October 1847, established his species _Boselaphus derbianus_, by publishing a short description of it in the ‘Annals and Magazine of Natural History’ for that month. It has been imagined, and even stated in print, that living specimens of this Eland were received by Lord Derby; but such, we believe, was not the case. The drawings made by Waterhouse Hawkins, and subsequently issued in the ‘Gleanings from the Knowsley Menagerie,’ were taken, we believe, not from living examples, but from the specimens brought home by Whitfield, as already mentioned.