362 CLASS MAMMALIA. 



and on the rest of the surface small longitudinal striae. It 

 measures two feet ten inches in length, and eleven inches 

 in circumference at the base. This horn was brought from 

 Sierra Leone. M. Desmarests suspects that it belongs to 

 a species of ox, if any were known in that country. Cattle 

 are certainly found in the interior, and horns artificially 

 twisted into spiral turns, are often seen on the heads of 

 favourite oxen in Caffraria, and the practice may extend to 

 the equinoctial line ; but the presence of a ridge and the 

 striae, seem to refer the specimen to the present group, and 

 we learn from a friend, who has resided on the west coast 

 at different times, that similar horns are sometimes brought 

 down for sale by the Mandingos. 



M. De Blainville mentions a pair of horns attached to a 

 part of the skin, observed by him in England. They were 

 black, smooth, close together at base, bent outwards, and 

 then turned inwards at the tips ; they were still attached to 

 a part of the skin belonging to the forehead, which was 

 marked with a large dark space, with a triangular spot of 

 white, symmetrically shaped into a crescent, commencing at 

 the base of each horn, the rest of the chaffron supposed to 

 be white: this fragment is unknown to us, and might be 

 of the Young Addax, or of the Strepsiceros, but the figure 

 is not very satisfactory. 



The Portacine Group. 

 In this group we place the large species of Southern 

 Asia, still more connected with the Bovine genus than the 

 preceding, by the position of the horns at the sides of the 

 frontal crest, the complete muzzle, bulky round body, and 

 cow-like feet. They are connected with the Damaline 

 genus, by the cavity in the nucleus of the horns, the ele- 

 vated shoulders and depressed croup ; by the mane on the 

 neck, the tuft beneath the throat, and an incipient dewlap. 

 The females are provided with four mammae, but destitute 



