THE MINOR ANTELOPES AND GAZELLES 343 
Two of the desert-forms—the ariel and addra—are 
comparatively large animals, corresponding in size with 
Grants gazelle in East Africa; the rest are smaller, 
comparable with Thomson’s gazelle. 
The following table roughly summarises their respective 
sizes, distinctive marks, and distribution 1 :— 
Desert- Gazelles. 
Species. 
Size. 
Weight. 
Height at 
Shoulder. 
Lateral 
Band. 
Distribution. 
Addra 
Ariel. 
Isabelline 
Dorcas 
Large 
)) 
Small 
120 lb. 
100 „ 
45 „ 
45 » 
36 ins. 
34 „ 
24 „ 
24 „ 
None 
Faint 
Less faint 
West of Nile 
East of Nile. 
5 J 
Both sides Nile. 
Bush-Gazelles. 
Red-front . 
Heuglin’s . 
Mongalla . 
Medium 
5 ) 
60 lb. 
60 „ 
60 „ 
28 ins. 
28 „ 
28 „ 
Black 
>) 
)5 
Both sides Nile, 
south of 13 0 N. 
Eastern Sudan, 
south from 
Kassala. 
Both sides Nile, 
south of Sobat. 
The ariel, a big upstanding animal, and the little 
Isabelline gazelle characterise the Eastern Sudan — 
that is, the area between the Nile and Red Sea littoral; 
but since our experiences with both these are narrated 
later, no more need here be said. The range of 
Heuglin’s gazelle lies along the extreme east of Sudan, 
bordering on Eritrea, hardly extending beyond the 
Atbara on the west . 2 On the north Heuglin’s gazelle 
1 While following the accepted classification, I am yet doubtful whether 
the two gazelles, Dorcas and Isabelline, should rank as separate species, 
the differences between them being confined solely to the “set” of their 
horns. I notice that a distinguished zoologist, Mr R. I. Pocock, holds 
that “Far too many species have been admitted to the genus Gazellal ’ 
2 General C. T. Blane informs me that in 1920 he met with black-banded 
gazelles, which were presumably Heuglin’s (also koodoo), on the Dinder 
river, a little above Abu-Hashim. 
