1896. } ANTELOPES OF EASTERN ALGERIA. 813 
Range, which form a sort of transitional zone between the moun- 
tains and the Sahara proper. Roughly speaking, this Gazelle is 
confined to a belt of country not more than 120 or 150 miles 
wide (and generally very much narrower). It may be found in 
plains, or even in low hills, within the southern mountain-chains, 
and on or near some of the sand-dunes on the confines of the 
Chotts. I have frequently seen it in the neighbourhood of the 
Chotts, but once into the Oued Souf and sand desert and all trace 
of it is lost and the Rhime takes its place. In the district of Sef 
el Menadi, where I have been twice with Sir E. G. Loder, and 
where he secured the first specimen of the Gazelle (the Rhime) 
which now bears his name, we found both Rhime and Dorcas on 
the same ground; and this place may be marked as the most 
northern limit which the Rhime ever inhabits, as it never leaves 
the sand, I think, whilst the Dorcas does not go much further 
south than this. Probably there are several of these isolated 
islands of sand where the Rhime may be found. 
The best male Dorcas that I have shot had horns a little over 
31 cm. in length, the best female 25 «m. (measured along the 
curve). 
They vary a good deal in colour according to the ground they 
frequent, and there is a slight variety among members of the same 
band. In 1893 there was on the plain of Ain Naga a pure white 
one, no doubt an albino; but though my hunter had frequently 
seen it, he was never able to find it for me. 
(2) The Rbime (Gazella loderi), Arab “ El Rhime,” Tamahaq 
“ Hankut,” is the common Gazelle of the Sahara. Enormous 
numbers are killed by the Arabs in the neighbourhood of Rhadamis, 
and their skins dressed and dyed with a dye made from the rind 
of pomegranates and exported from Rhadamis. They are to be 
found throughout the region of the great Ergs and everywhere 
in the Sahara sands where there is vegetation sufficient to 
support them. The only places where they are to be met with, 
I believe, north of El Oued Souf, are to the south-west of Bou 
Chaama and near Sef el Menadi. A number of their horns are 
always on sale at Biskra and sometimes the skins. The male 
horns of the Rhime sometimes bear so close a resemblance to 
those of the Admi (Gazella cuviert) that they are often sold and 
bought as such. The Admi horns are much less commonly seen than 
the Rhime; as a rule, they are to be distinguished. The general 
character of the Rhime horns as distinguished from the Admi are, 
so far as I can describe them, as follows :-— 
In the Rhime among average specimens the horns form in their 
main outline a long evenly-tapering V, whilst in the Admi the 
horns co far up from their base are more inclined to the parallel 
before springing out laterally, and towards the points usually take 
an inward and forward turn; this turn inward is rarer, though 
not uncommon, in the Rhime, but the forward bend at the top is 
common to both. 
I have remarked, too, that the annulations or notches are as a 
