The existence of a Gazelle of the group allied to _Gazella dorcas_ in West Africa was first made known to us by the authors of the great folio work called ‘Histoire Naturelle des Mammifères,’ issued at Paris, in which the figures were taken mostly from living specimens. In one of the early livraisons of this publication, in which French names only are primarily used, this species was referred to the “Kevel” of Buffon, and under this name a young male was figured, stated to have been brought to France from Senegal. In a later livraison two young specimens of the same species, also from Senegal, were figured as the “Corine” of Buffon, which was declared to be identical with the “Kevel.” We have, however, already shown (under the head of _Gazella dorcas_) that both these terms of Buffon are referable to the last-named species, and that neither these terms nor the scientific names founded upon them can be properly used for any other species. Hence it follows that the first scientific name that can be employed for this Gazelle is _Gazella rufifrons_ of Gray, under which term it was curtly described by that author in the ‘Annals and Magazine of Natural History’ for 1846. Shortly after that period the same species was figured in ‘Gleanings from the Knowsley Menagerie’ by Waterhouse Hawkins, whose well-drawn plate contains portraits of two males, a female, and a young one of the present species. As the drawings in the ‘Gleanings’ were not in all cases taken from animals living in Lord Derby’s Menagerie, some of them having been prepared from specimens in the British Museum, it is nearly certain that this was the case in the present instance. It will be observed that Gray in his description mentions almost exactly such a series as being in the Museum as is drawn in the ‘Gleanings,’ and it is not probable that a similar set should also have been living at Knowsley at the same time. All the specimens mentioned by Gray, with one exception, are still in the National Collection, and, as “co-types” of the species, show clearly to what animal the name “_rufifrons_” should be applied.