1911 Encyclopædia Britannica/Palla

PALLA, Pala, or Impala, the native name of a red South African antelope of the size of a fallow-deer, characterized by the large black lyrate horns of the bucks, and the presence in both sexes of a pair of glands on the back of the hind feet bearing a tuft of black hairs. On the east side the palla (Aepyceros niclampus) ranges as far north as the southern Sudan; but in Angola it is replaced by a species or race (Ae. petersi) with a black “blaze” down the face. Pallas associate in large herds on open country in the neighbourhood of water. (See Antelope.)