APPENDIX. 353 



dark, and expressive. Tail eight inches long ; white, with a tuft 

 of posteriorly directed black hairs. 



Female similar, but smaller, with very slender horns, and feAV 

 indistinct annuli. Mammae two. 



Scattered over the plains in countless herds. 



29. Gazella Albifrons. The White-faced Antelope. Blesbok 

 of the Cape Colonists. Nunni of the Bechnana. 



Adult male three feet eight inches high at the shoulder, and six 

 feet three inches in extreme length. Head long and narrow. 

 Muzzle broad. Horns from twelve to fifteen inches in length, white, 

 very robust at the base ; divergent, with ten or twelve semi-annuli 

 on the anterior side. A patch of chocolate- coloured hair at the 

 base of the horns, divided by a narrow white streak, which suddenly 

 widens between the eyes to the whole breadth of the face, down 

 which it passes to the nose. Ears rather long and white. Sides of 

 the head and neck deep purple chocolate. The back and shoulders 

 hoary bluish-white, as if glazed. Flanks and loins brown. Belly 

 white. Legs brown outside, white \^dthin. Croup and chest rufous. 

 Tail reaching to the hocks; seventeen inches long, with much 

 posteriorly directed brown and white hair. Linear nostrils. Very 

 indistinct muzzle. Small circular lachrymary perforation. 



Female precisely similar, but slighter, less vividly coloured, and 

 with more slender horns. Mammae two. 



Very gregarious. Inhabits the plains south of the Vaal River 

 in immense herds. 



30. Gazella Pygarga. The Pied Antelope. Bonte-bok of the 

 Cape Colonists. 



Rather larger than the preceding. Head long, narrow, and shape- 

 less, with a very broad muzzle. Horns fifteen inches long ; black, 

 divergent, erect, very robust at base, with ten or twelve incomplete 

 annuli, broken in the middle and striated between. Forehead and 

 face white, as in the Bles-bok. Ears long and reddish. Sides of 

 the head, neck, and flanks, deep purple brown. Back bluish lilac, 

 as if glazed. Legs perfectly white from the knees and hocks down- 



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