On the 15th of August, 1873, the Zoological Society of London received as a present from Major C. B. Euan Smith (now Col. Sir Charles B. Euan Smith, K.C.B.) a male Gazelle which he had brought with him from Muscat. On September 20th of the same year a female, obviously of the same species and obtained at the same place, was received by the Society on deposit from Mrs. Harris, then of Limefield, Kirkby Lonsdale. Sir Victor Brooke having then lately published his well-known monograph of the Gazelles in the Zoological Society’s ‘Proceedings,’ and being specially interested in the group, Sclater lost no time in calling Sir Victor’s attention to these animals, with which he was much delighted. Sir Victor described them as belonging to a new species at the meeting of the Zoological Society on Feb. 27, 1874, under the name _Gazella muscatensis_, and pointed out the clear differences which separated them from _G. arabica_, which up to that time he had believed to be the only Gazelle met with in any part of Arabia. [Illustration: Fig. 70. Fig. 70 _a_. Heads of Muscat Gazelle, ♂ & ♀. (From specimens in B. M.)] Instead of the massive, nearly straight, non-lyrate horns of _G. arabica_, Sir Victor showed that the new species had rather slender horns, compressed from side to side and distinctly lyrate, with their points turned boldly forwards and inwards. In general appearance also the Muscat Gazelles differed from _G. arabica_ in their long and soft coats of a silvery-grey colour, instead of the short close-set pelage of a rich grizzled bay. From _G. dorcas_, to which they bore more resemblance, the Muscat species was recognizable by its smaller size, its different colour, and by the intensity of the facial and lateral markings. Sir Victor’s paper on this new Gazelle was illustrated in the ‘Proceedings’ by a good coloured plate drawn by Keulemans, in which, however, the general colour is made rather too dark. In 1874 a second male specimen of this well-marked species was presented to the Zoological Society’s Menagerie by Mr. J. H. Bainbridge, and in October 1881 a pair of the same Gazelle were presented by the late Lord Lilford. These last bred a young one, which was born in the Society’s Gardens on the 6th of March, 1882. No more examples of the Muscat Gazelle reached the Regent’s Park after this date until 1894, when a female of this species was obtained “in exchange,” and a pair were received “on deposit” from the Hon. Walter Rothschild, F.Z.S. The male of this pair is still living in the Society’s Menagerie.