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Genus III. ADDAX. 
Type. 
Addaz, Rafinesque, Analyse de la Nature, p. 56 (1815) . . . A. NASO-MACULATUS. 
General characters as in Oryx, but with the horns spirally twisted; the 
hoofs expanded as in the Reindeer; a distinct, though short, mane on the 
forehead and sides of the neck; the hair along the middle line of the back 
not projecting towards the head; tail-tuft smaller. 
Range of the Genus. North Africa, from Dongola to Senegal. 
