2 
The present subfamily consists therefore of nine genera, which may be 
arranged as follows :— 
A. Horns spirally twisted - . 5 95> = % be pe) ee NaOEE 
B. Horns curved or straight, not twisted. 
a. Kalseyhootsvabsent,. |) =...) anes 2. ALPYCEROS. 
b. False hoofs present. 
a'. Horns medium or long, curved. 
a*, Muzzle swollen or elongated. 
a’. Horns medium, lyrate, whitish . . . . SAIGA. 
6°. Horns long, slightly curved, black. . . . 4. PANTHOLOPS. 
62. Muzzle slender, normal. 
(5%) 
a>. Neck normal. 
a*, Horns convex forwards for three-fourths their length. 
a°. Back with a central white streak. Lower premolars 2. 
5. ANTIDORCAS. 
6°. Back normal. Lower premolars3 . . 6. GaAzELLA. 
64. Horns concave forwards, except just at their base. 
7. AMMODORCAS. 
6°. Neck much elongated. Horns as in Gazella. 8. Lirnocrantvs. 
b'. Horns short, quite straight . . . . . . . . 9. Dorcorraeus. 
DSI 
