416 Zoological Society. 



the genus Eleotragus (as in his paper) being far removed. The skull 

 in the Museum, although the occiput is lost, bears full evidence of its 

 real affinity. Among the interesting additions to South African zoo- 

 logy discovered by those travellers who have visited the great lake re- 

 cently discovered in that region, an undescribed species of Antelope*, 

 of which a beautiful skin was recently brought before the Society, 

 will perhaps assist the more sceptical in osteological characters in 

 arriving at a just conclusion on this point, since, while it has the sta- 

 ture and lengthened horns of the ellipsiprymnus, it has the brilliant 

 colour and the external marks (particularly the dark stripe down the 

 fore-leg) which characterize the smaller species. 



This genus does not seem to show any particular affinity to any 

 of the rest, and forms a well-marked group, of which the species are 

 scattered over various parts of Africa, and are mostly noted for their 

 predilection for the vicinity of water. 



I here again adopt Mr. Gray's generic name, to avoid the neces- 

 sity of altering the name of one of the species, the E. reduncus. 



Strepsiceros. 



The nasal opening of moderate size ; a suborbital fissure, but no 

 fossa ; the masseteric ridge not extending high ; the auditory bulla 

 swollen and prominent ; the basioccipital bone with its anterior and 

 posterior pairs of tubercles well-developed, the former separated by a 

 deep median groove ; the median incisors expanded at their summits ; 

 the molars without supplemental lobes. 



Horns inclined backwards from the base, twisted, with one or more 

 longitudinal angular ridges. 



Hab. Africa. 



S. cudu. 8. Derbianus. 



S. euryceros. S. scriptus. 



S. Angasii. S. silvaticus. 



S. oreas. S. decula. 



The general aspect of the skull in this group reminds one a little 

 of that of the Deer. The species all agree very closely, both in struc- 

 ture of the skull, and in the direction, twisting, and ridges of the 

 horns, the Coudou differing only in having the spiral wide and open, 

 and in the horns being confined to the male, while the Eland is only 

 a gigantic representation of the smaller species. S. euryceros, S. An- 

 gasii, and a species most probably distinct from the rest, of which 

 Capt. Allen brought a skull from the Bight of Biafra, show an inter- 

 mediate condition of the horns ; and in S. Angasii, at least, they are 

 known to be wanting in the female. Major Smith himself has here 

 been deceived by size, and been led to place the subgenus Tragela- 

 phus under his genus Antilope, and the others under his genus Da- 

 malis ; even availing himself of stature, and in the case of the Cou- 

 dou, of a white streak over the eyes, to help out the meagre distinc- 

 tions. In associating the Nyl-Ghau with these animals, Mr. Gray 

 has even allowed colour and marking to deceive him, for in this ani- 

 mal the horns are not even spiral ; but in another respect the charac- 



* Since named Kolus lecM by Mr. Gray. 



