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Female. Similar to the male, but the horns slender, scarcely ridged, their 
tips curved inwards rather than upwards; in length nearly equal to those of 
the male. 
Hab. Coast-lands of the Red Sea from Suakin to Massoua, and over the 
interior to Bogos, Barca, and Taka. 
It is possible that the Gazelles described and figured by Lichtenstein in the 
first part of his ‘ Darstellung der Thiere’ as ‘“‘ Antilope dorcas,’” which were 
stated to have been procured by Hemprich and Ehrenberg in Sennaar, may 
have belonged to the present species. Sundevall certainly considered them 
to be referable to a species distinct from the true Gazella dorcas, and 
proposed to call them “ ?¢szdis,” from Lichtenstein’s vernacular name “ Isis 
Antelope.” But this identification is by no means certain, and, at all events, 
the name “‘isahella,” under which this Gazelle was shortly diagnosed by the 
late Dr. Gray in 1846, will take precedence of Sundevall’s appellation. 
Gray’s description is very short, and does not allude to the shape of the 
horns, which are one of the most characteristic features of this species. His 
type specimen is still in the British Museum. It is an immature male, 
mounted, and stated to have been received from “ Abyssinia,” though Gray 
in later papers gives “Egypt” and “ Cordofan” as the localities for his 
G. isabella. 
Heuglin, in his various memoirs on the Antelopes of N.E. Africa, did not 
keep G. isabella separate from G. dorcas, and united their localities. Sir 
Victor Brooke, in his monograph of the Gazelles, though he divides them 
and says that “amongst the smaller Gazelles no two species could produce 
two more dissimilar animals than typical specimens of G. dorcas and 
G. isabella,” states his conviction that “every intermediate degree between 
them will be found represented in intermediate localities.” It is indeed 
true that G. tsabella is a very inconstant species and requires further 
careful study. 
There can be no doubt that Dr. Blanford’s Gazella dorcas, in his volume on 
the ‘Geology and Zoology of the Abyssinian Expedition,’ is what we here 
call G. isabella. The figure of its horns (op. cit. plate i. fig. 1) shows the 
characteristic twist inwards at the upper end. Moreover, a skull of a male 
(from Zoulla) and a skull and skin of a female (from Amba), obtained by 
