In a communication made to the Royal Academy of Sciences of Berlin in October 1879 the former Director of the Berlin Museum, the late Dr. Wilhelm Peters, gave an account of the specimens of Mammals collected in East Africa in 1878 by the well-known traveller Dr. G. A. Fischer. Amongst these were the skull and skin of a young male Gazelle obtained at Gelidja, near the mouth of the Osi and Tana Rivers, on June 27th, and stated to be called there by the Swahilis and Wapakomos “_Sala_.” Peters added to his paper on this subject an excellent lithographic plate of the skull and horns in question, which he referred, without much doubt, to _Gazella granti_, remarking, however, that the nose-spot was not well defined, and that the horns were straight at the base and not curved. [Illustration: Fig. 79. Skull and horns of Peters’s Gazelle, ♂. (From one of Mr. Jackson’s specimens in the British Museum.)] In 1884 Dr. Günther, commenting on Peters’s figure of this supposed _Gazella granti_, stated that in his opinion it “clearly belonged to a distinct species. It resembled somewhat _Gazella thomsoni_ in the slight degree in which the horns diverge from each other; but their annulated portion was almost straight, and the annuli themselves were much further apart, much fewer in number (about twelve), and lower towards the hinder part of the horn. The base of the bony core showed a bossy swelling, which was different from that of _Gazella granti_, and entirely absent in _Gazella thomsoni_.” This species Dr. Günther proposed to call _Gazella petersi_. There has, however, been much doubt raised by subsequent authorities as to the validity of this species, and although we have given a separate heading to _Gazella petersi_ we have had considerable hesitation as to whether it ought not to be regarded rather as a local subspecies of _G. granti_, to which it is closely allied in all essential characters. But since we have as yet seen no specimens absolutely intermediate between the two, so far as the rump-markings are concerned, we have thought it advisable to keep them provisionally separate. At the same time we shall be in no way surprised if such specimens should occur, in which case the two forms will have to be united. As regards the skulls, no constant or tangible difference can be made out, although those of _G. petersi_ can usually be distinguished by their smaller size, narrower nasal opening, and shorter and less divergent horns. Mr. F. G. Jackson, in ‘Big Game Shooting,’ gives us the following account of this Gazelle and his experiences with it:--