Speke’s Gazelle was first discovered by the energetic African explorer, whose name it appropriately bears, during his expedition to Harar in the summer of 1854 in company with the late Capt. Sir Richard Burton[10]. Speke, who attended to the natural history of the expedition, forwarded the collections made upon this occasion to Blyth, at that time curator of the Asiatic Society’s Museum at Calcutta, and in the zenith of his zoological work. In his report upon the collection, which was published in the twenty-fourth volume of the ‘Journal of the Asiatic Society of Bengal,’ Blyth did not venture to bestow a new name on this Gazelle, although he gave an accurate description of it, and added a note (obtained from Burton) calling special attention to “the elevation of loose replicated skin upon the nose,” so that there can be no doubt as to which of the two allied species Speke’s specimens (which are still in the Calcutta Museum[11]) belong. In the reprint of Blyth’s ‘Report,’ which was edited by Speke in 1860 after his return to this country, this Gazelle was erroneously referred to _G. cuvieri_ of Ogilby. In 1883, however, Blyth, who had discovered that this was a mistake, proposed the name _Gazella spekei_ for this species in his ‘Catalogue of the Mammals of the Asiatic Society’s Museum,’ and this appellation has been generally adopted for it ever since. When the late Sir Victor Brooke wrote his Monograph of the Gazelles in 1873 Speke’s Gazelle was hardly known in this country, and Brooke was only acquainted with it from photographs of the type specimens in the Calcutta Museum. But since that date Somaliland has been fully opened to British travellers, and the numerous explorers and sportsmen who have visited that much-hunted country have brought back good sets of specimens both of Speke’s and of Pelzeln’s Gazelle, and made us well acquainted with the ranges and other peculiarities of these two species.