_Gazella nanguer_, =Fitz.= SB. Wien, lix. pt. 1, p. 158 (1869). _Antilope mhorr_, var. β, =Wagn.= Schr. Säug. Suppl. iv. p. 410 (1844), v. p. 404 (1855). _Gazella mohr_, =Gray=, Cat. Rum. B. M. p. 39 (1872) (partim); =Brooke=, P. Z. S. 1873, p. 648 (partim). _Antilope dama_, var. _occidentalis_, =Sund.= Pecora, K. Vet.-Ak. Handl. 1845, p. 266 (1847); =id.= Hornschuch’s Transl., Arch. Skand. Beitr. ii. p. 262; Reprint, p. 82 (1848). VERNACULAR NAME:--_Nanguer_ in Senegal (_Buffon_). Size about as in _G. ruficollis_ and _G. mhorr_. Markings throughout very much as in the next species, _Gazella mhorr_, but the white of the rump-patch, although less than in _G. ruficollis_, where it spreads all over the body, is considerably more extended, uniting on the thighs with the white of the sides of the belly, and therefore cutting off the dark colour of the outer sides of the hind limbs from that of the back. Other characters very much as in _G. mhorr_. _Hab._ Senegal and Gambia. Passing now to the western end of Northern Africa we find this group of Antelopes represented by the “Dama” Gazelle, a species which has been known to naturalists ever since the time of Buffon. By him it was described and figured in the twelfth volume of his ‘Histoire Naturelle,’ under the name of “_Le Nanguer_” the appellation stated by Adanson to be given to it in Senegal. Upon the “Nanguer” of Buffon, Pallas in 1766 established his _Antilope dama_, so that there can be no question as to _Gazella dama_ being the correct name of the representative species of this group in Senegal. But whether Pallas was right in assigning the term “_dama_” of Pliny to the present animal is a matter open to much question. The late Mr. E. T. Bennett has discussed this subject in his article on the Mhorr Antelope published in the first volume of the Zoological Society’s ‘Transactions,’ to which we may refer our readers. But there can be little doubt that the ordinary “_Dama_” of the Romans was not the present animal, but the well-known Fallow-Deer, _Cervus dama_. For many years the naturalists following Buffon and Pallas gave us no further information concerning this Antelope, and merely copied what their predecessors had said of it. Sundevall, in his well-known treatise on the “Pecora,” united the three members of this group together under “_Antilope dama_,” designating the forms of Morocco and Senegal as “var. _occidentalis_,” and stating that he had examined a specimen of it in the Frankfort Museum. If the locality and the references given by Rüppell in his catalogue of the Senckenbergian Collection are correct, the specimen in that collection must be the “Mhorr” of Morocco, and not the “Nanguer” of Senegal. We are told by Gray (‘Gleanings from the Knowsley Menagerie,’ p. 5) that the Frankfort specimen was originally received from the Zoological Society of London.