The Collaborative International Dictionary of English v.0.48:

pallah \pal"lah\ (p[a^]l"l[.a]), n. (Zool.)
   A large South African antelope (Aepyceros melampus). The
   male has long lyrate and annulated horns. The general color
   is bay, with a black crescent on the croup. Called also
   roodebok.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Roodebok \Roo"de*bok\, n. [D. rood red + bok buck.] (Zool.)
   The pallah.
   [1913 Webster]