BUSHBUCKS, KOODOOS, AND ELANDS 459 
Key to the Species of Taurotragus 
Ears broad and rounded with a black bar on inside of hinder margin; 
mane on nape black, long and extended, covering 
whole nape and sides of neck; throat fringed by a 
narrow mane; a white bar across lower throat; 
cheeks with two large white spots; fetlocks banded 
in front by a black bar; horns very long, twice length 
of head; rostral part of skull short. derbianus 
Ears narrow and pointed, without a dark bar on inside; mane on neck 
when developed only covering nape and never black 
in color; no white throat bar or cheek spots; legs uni¬ 
formly colored on outer side; horns short, not greatly 
exceeding length of head; rostral part of skull elon¬ 
gate. oryx 
The Giant Eland 
Taurotragus derbianus gigas 
Native Names: Bari (Swaka), tukectuk; Bong Bong, boroku; Ojeng, qual- 
qual; Djur, adjur; Dor, newarreh. 
Boselaphus gigas Heuglin, 1863, Nova Acta Acad. Leop., vol. XXX, p. 19, 
pi. 1, fig. 2 (horns). 
Range.— So far as known the giant eland is confined 
to the Bahr-el-Ghazal and Lado Enclave Provinces of the 
Egyptian Soudan. It is limited to the western drainage of 
the Bahr-el-Jebel Nile, extending roughly from the vicinity 
of Rejaf northward to the Bahr-el-Ghazal River and its 
continuation the Bahr-el-Arab; westward it reaches Dem 
Zubeir in the Dar Fertit country. The distribution's lim¬ 
ited to the eastward by the Nile and northward by its 
chief western affluent, the Bahr el Ghazal; while westward 
the heights of the Nile watershed confine it. In this latter 
region, however, it extends to the very borders of the water¬ 
shed in the Niam-Niam country. 
Throughout this range it is distributed only locally and is 
so rare that it is a very difficult species to obtain. From the 
typical race inhabiting Senegal it is separated by a distance of 
two thousand miles, the whole drainage system of the Niger 
intervening. The two races are so similar that such isola¬ 
tion must be very recent. The case is somewhat paralleled 
