67 
The anterior facial region in Gazelles, from the base of each horn to the muzzle, is cut 
off from the sides of the face on both sides by white streaks, which, starting externally 
to the base of each horn, run downwards to within two inches of the nostrils; the former 
I shall call the ‘ central facial band, the latter the ‘light facial streaks’ From the 
corner of the suborbital gland, running downwards immediately below the light facial 
streak, and of about equal width, is a dark line; this I shall refer to as the ‘ dark facial 
streak. Bordering the white of the belly on each side, and extending from above and 
behind the ulna to above and in front of the patella, are two bands, the lower of which 
is darker, the upper lighter than the colour of the back and flanks. The former I shall 
speak of as the ‘ dark lateral band, the latter the ‘light lateral band” Lastly, bordering 
the white of the rump is frequently seen a narrow indefinite darkish band, which may 
be conveniently called the ‘pygal band.’ The difficulty of expressing differences 
dependent to a large extent upon shades of colour and texture of hair sufficiently sharply 
to give a just impression of the effect produced by such ditferences upon the eye may 
eause the distinction of some of the forms below mentioned to appear doubtful. I can 
only say that upon occasions when I have had ample opportunity of subsequently 
verifying my identification, I have never experienced any difficulty in referring speci- 
mens entirely new to me to their proper name and habitat. The descriptions must be 
taken as applying to thoroughly typical specimens, the intensity of the markings and 
length and curvature of the horns being subject to great individual variation.” 
Since Sir Victor Brooke wrote his monograph of the Gazelles, many species 
only known to him by descriptions or by imperfect specimens have become 
represented in our National Museum by complete examples, while several 
additional species have been discovered. Our arrangement of the species is 
therefore necessarily different from his, but is, we fear, still very far from 
being perfect, as more and better specimens of most of the forms are still 
wanted before their exact geographical distribution, their extent of variation, 
and their true relationships to each other can be satisfactorily worked out. 
As already noted, we have removed from the genus Gazella, under the 
name Antidorcas, the South-African Springbuck, which Sir Victor Brooke 
included init. ‘This being eliminated, the 25 species which we are prepared 
to recognize as distinct may be arranged as follows :— 
A. Tail quite short. No Gazelline face-markings. Females without horns. 
a. Horns strongly curved backwards. Skull 7 in. or less in basal length. 
a’. Horns not hooked at tip. (Tibet.). . . . 82. G. picticaudata. 
b'. Horns hooked at tip. (Mongolia.). . . . 83. G. przewalskii. 
6. Horns but little curved backwards, not hooked at tip. Skull about 9 in. 
in basal length. (N.China.) . . . . . . 84. G. gutturosa. 
K 2 
