These differences between the gazelle, the kevel, and the corine, although very apparent, especially in the corine, do not appear to be essential, nor sufficient to divide these animals into different species; for they resemble each other so much in every other respect, that they seem to be all three of the same species, more or less varied by the influence of climate and food. There is much less difference between the kevel and the gazelle, than the corine, whose horns in particular bear no resemblance to those of the other two; but all three have the same natural habits; they assemble and feed together in herds; they are of mild dispositions, and easily accustomed to a domestic state and the flesh of all three is very good to eat. We think ourselves therefore, authorised to conclude that the gazelle and kevel are certainly of the same species, and that it is uncertain, whether the corine be only a variety of the same species or whether it be a different one. In the royal cabinet of France, there are skins of these three different antelopes, besides which, there is a horn that bears a great resemblance to those of the gazelle and kevel, but much larger; this horn is engraven in the works of Aldrovandus, _Lib._ I. _de Bisulcis, c._ xxi. Its thickness and length seem to indicate a much bigger animal than the common gazelle, and it appears to me to belong to an antelope which the Turks call _tzeiran_, and the Persians _ahu_. This animal, according to Olearius, in some measure resembles our fallow-deer, except being rather of a red than yellow colour; the horns, likewise, are without antlers, and rest upon the back, &c. M. Gmelin, who describes it under the name of _dsheren_ says, it resembles the roe-buck, with this exception, that the horns like those of the wild goat, are hollow and never fall off. He also adds, that in proportion as the horns increase in growth, the cartilage of the larynx thickens, and forms a considerable prominence under the throat when the animals are advanced in years. According to Koempfer the _ahu_ differs not in the least from the stag in its form, but that his horns appear nearer to those of the goat, which are single, black, and annulated, as far as the middle, &c. Some other authors have likewise made mention of this species of antelope under the name of _geiram_ and _jarain_, which it is easy to restore, as well as that of _dsheren_ to the primitive name of _tzeiran_. This antelope is common in South Tartary, in Persia, in Turkey, and is also to be met with in the East Indies.