100 MAMMALIA, 
brown, rather greyer on the shoulders. Nose, lips, hinder parts 
of the thighs, under the neck, from the ears to the gullet, 
a streak over each eye, and ring above the hoofs and false hoofs, 
white. Belly and legs blacker. End of tail and legs, from 
shoulder to hough, black. Females greyer. Belly and upper part 
of legs paler. ; 
Antilope Smg-Sing, Bennett, Rep. Zool. Soc.; Waterhouse, Cat. 
Zool. Soc. Mus. 41. n. 378. 
Antilope defassa, Riippell, Faun. Abyss. t. 3. ; 
Redunca defassa, Riippell, Verz. Senck. Samml. 1822, 1845. 
Antilope unctuosa, Laurillard, D’Orb. Dict. Univ. H. N. i. 
t. 622 3, good. 
A. Neotragus unctuosa, Lesson, Nov. Tab. R. A. 178, 1842. 
Antilope Koba, Ogilby, Penny Ency. iu. 79 f. 9; Proc. Zool. 
Soc. 1836, not Era. 
?Koba, Buffon, H. N. xii. 210. 267. t. 32. f. 2, horn? (more 
probably Damalis pygarga?). 
?Senegal Antelope (part.), Pennant, Syn. 38, part. from Buffon 
only. ' 
Hab. W. Africa. 
Female, adult. Gambia. Presented by the Earl of Derby. 
Male, young. Gambia. Presented by the Earl of Derby. 
OsTEOLOGY. 
Skeleton, male, young. Gambia. Presented bythe Earlof Derby. 
Skull, female, adult. Gambia. Presented by the Earl of Derby. 
Skull, female, young. Gambia. Presented by the Earl of Derby. 
This species varies much in the tint of the colouring, and in 
the length of the hair in the different seasons. In summer they 
are covered with very short, closely pressed fur, letting the skin 
be seen between the hairs. In the cold weather, and in England, 
‘ the fur is longer and more abundant. The hair of the chin and 
neck is long and rigid in all seasons, and even in the young ani- 
mals. The tail of the adult specimen is cylindrical and nearly 
bald, ending in a tuft of black hair; in the young specimens, 
especially in the winter fur, the base of the tail is frmged with 
hair on each side. The male is much brighter-coloured, and the 
chest and belly are nearly black, like the legs. The hinder parts 
of the rump of the young animals are greyish white ; m the older 
specimens it becomes pure white and broader in extent. __ 
This animal is called Sing-Sing by all the negroes. They do 
not think their flocks of cattle will be healthy or fruitful unless 
they have one of the Sing-Sings accompanying them, as some 
persons think a Goat necessary to be in a stable in England. 
The English on the Gambia call it the Jackass Deer from its ap- 
