MAMMALIA. 127 
A. Gazella Korrigum, Lesson, Nov. Tab. R. A. 176. 
Alcelaphus Senegalensis, Turner, P. Z. S. 1848. 
Hab. West Africa; Gambia River, Macarthy’s Island, Mr. 
Whitfield, called Yonga; Senegal; Senaar. Mus. Stockholm. 
Young. Gambia. Presented by the Earl of Derby. 
OsTEOLOGY. 
Skull and horns. Bornou. Presented by Capt. Clapperton, 
R.N., and Major Denham. (The specimen figured: by Col. H. 
Smith, and noticed by Mr. Children.) 
Skull and horns. Bornou. Presented by Capt. Clapperton, 
R.N., and Major Denham. 
Skull. Gambia. Presented by the Earl of Derby. 
Mr. Whitfield informs me this species is found on Macarthy’s 
Island, on the Gambia; they afford very good venison; are 
called Yonga or Yongah by the Ioliffs, and Tan Rong by the 
Mandingoes. 
_In Denham & Clapperton’s Travels I regarded this species as 
the Koba of Buffon, and Colonel H. Smith and Dr. Sundevall 
are of the same opinion: but on comparing the six pairs of horns 
of this species which I have been able to examine with Buffon’s 
figure and descriptions, I find them all longer and much thicker 
at the base than Buffon describes them ; the thinner specimen (a 
female?) bemg 7 and the others 9 or 93 inches in circumference, 
while that Buffon described is only 5 inches. The rings are also 
more elevated, and reach nearer to the top than im Buffon’s 
figure. All the characters lead me to believe that the horns figured 
as those of the Koba by Buffon belong to Damalis Pygarga. 
Colonel Hamilton Smith, mn Grifith’s Animal Kingdom, de- 
scribed and figured the heads brought home by Messrs. Denham 
and Clapperton as Antilope Senegalensis, but they are different 
from the one so called by Cuvier. Mr. Ogilby, in the Proceed- 
ings of the Zoological Society (1826, 103), proposed to call these 
heads A. Corrigum. 
Under the name of Antilope Koba, Schinz (Syn. Mam. ui. 407) 
combines the A. defassa, Riippell, Damalis Senegalensis and 
Antilope adenota, H. Smith, the Koba of Buffon, and the Anti- 
lope Koba or Caama of Erxleben. 
*** Horns regularly lyrate, parallel at the base. Face of the 
adult white. 
3. DAMALIS PyGarGa. The Nunni or BonTE Boc. 
Purple red. Outer side of the limbs darker. Streak between 
horns, face, and rump above the tail, white. Temple and upper 
