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pointed, pale whitish buffexternally. Tail sandy at base, darkening terminally 
to brownish black. Front of fore limbs sandy, of hind limbs whitish ; knee- 
brushes distinct, but little darker than the general colour. Hoofs variable in 
shape, those of specimens from the sandy regions of the Sahara much 
elongated, while in other regions they are of the usual shape. 
Skull of normal proportions ; premaxille broadly articulating with nasals. 
Basal length in an old male 6°45 inches, greatest breadth 3°3, muzzle to 
orbit 3°6. 
Horns of male long, about twice the length of the skull, slender, closely 
and heavily ringed nearly to the tip. They are very variable as to their exact 
curvature, but are ordinarily rather straighter than in other species, curving 
but slightly backwards; they are near together basally, diverging above, 
sometimes very widely, so as to make them resemble divergent horns of 
G. granti in miniature. 
Female. Similar to the male, but the horns, although nearly equally long, 
are much slenderer and even less curved than in the male. 
Hab. Sandy tracts of the interior of Algeria, Tunisia, and Western Egypt, 
south to Nubia and Sennaar. 
The great folio work of Geoffroy St.-Hilaire and Frédéric Cuvier entitled 
‘Histoire Naturelle des Mammiféres,’ which was issued in livraisons from 
1824 to 1842, contains a long series of coloured figures of mammals, mostly 
taken from examples living in the well-known Menagerie attached to the 
Jardin des Plantes. Amongst these in the seventy-second livraison, published 
in 1842, were the first descriptions and figures given of both sexes of the 
present Gazelle, from examples stated to have been brought from Sennaar by 
Burton. They had lived in the Menagerie, we are told, two years, and had bred 
a young one, which resembled its parents in most particulars. The appropriate 
scientific name “leptoceros,” from the long thin horns, had been given to this 
species, we are informed, by Georges Cuvier, and was adopted by the authors 
of the work referred to, who, however, called it at the head of their article, 
after their usual fashion, only by the French name “ Antilope a longues 
cornes.” 
Very little more information was acquired concerning this Gazelle for 
many years. Most of the systematists were entirely unacquainted with it, 
