treatise, which was mainly based upon the specimens sent to the Royal 
Collections by the well-known travellers Hemprich and Ehrenberg from 
Dongola and Sennaar, were several representatives of the present species 
which Lichtenstein not unnaturally referred to the Antilope dama of Pallas. 
The same course was pursued by Hemprich and Ehrenberg themselves, who 
shortly afterwards published full descriptions and figures of it in their 
‘Symbole Physice.’ They inform us that they met with specimens of this 
Antelope in Southern Dongola in the month of July 1822, and hunted it 
along with the Addax and Leucoryx, which occurred in the same district. 
They found it plentiful in herds and easy of access, even without the use of 
horses. Like the other species mentioned, it feeds principally on the acacias. 
They did not meet with this Antelope until they arrived at 20° N. lat. going 
. south, after which they found it abundant. The Arabs, who much esteem 
the flesh and sell it when dried, call it “ Addra.” It did not appear to approach 
the banks of the Nile, but kept entirely to the desert and to the valleys which 
traverse it, especially to the Chor-el-Lebben. 
Not far from the same date another distinguished German traveller and 
naturalist, Rtippell, whose name we have already had frequent occasion 
to mention, also met with this Antelope. Riuppell sent his specimens to 
Frankfort-on-the-Main, where they were described and figured by Cretzschmar 
on the part of the Senckenbergian Society of Naturalistsin 1826. Cretzschmar 
also referred these specimens to Antilope dama; but Hamilton Smith, after 
examining them in the Senckenbergian Museum, came to the correct conclu- 
sion that they belonged to a different species, on which he proposed to bestow 
the name Antilope ruficollis. We must therefore use Gazella rujicollis as the 
correct scientific designation of this animal. A third German naturalist, 
Heuglin, who has recorded his experiences of this species, tells us that he 
met with it, generally in pairs or small families, and cften mixed up with 
herds of other Gazelles, in the desert districts of Dongola and Kordofan, 
where it is known to the Arabs as the “ Adra”'or “Ledra.” From this 
native name, Bennett, in his memoir on Gazella mhorr, to which we shall 
presently refer, proposed to call the present species Antilope addra, but, as 
has been already stated, Hamilton Smith’s name has precedence. 
Gazella ruficollis is, we regret to say, represented in the British Museum 
by two specimens only, neither of which is suitable for exhibition in the 
