414 Zoological Society. 



the first one, Mr. Gray's generic name Oreotragus, without at present 

 wishing to enter into the question of its right to supersede that of Tra- 

 gulus, because the latter name has been also used by Mr. Gray for a 

 group of small Musk Deer, needlessly separated from the Meminna. 

 I do not see sufficient in the small horns contained in the Museum 

 of the College of Surgeons to warrant the adoption, as a genus, of 

 Major Smith's subgenus Raphicerus. I will not attempt to conjec- 

 ture to what species they may belong : they show nothing to prevent 

 their ranking among the Oreo tragi ; and their locality, said to be the 

 East Indies, while all the members of this genus are African, is not 

 known with certainty. 



Oreotragus. 



A small suborbital fissure, with a large'deep fossa suddenly pressed 

 in before the orbit; the masseteric ridge rising a little before the 

 orbit ; the auditory bulla rather large and prominent ; the basiocci- 

 pital bone flat and smooth ; the median incisors expanded at their 

 summits, and the molars without supplemental lobes. 



Horns small, placed forwards, vertical. 



Hob. Africa. 



O. saltatrix. 



O. scoparius. 1 Of these two species I 

 O. tragulus. J have seen skulls. 

 O. melanotis. 



Neotragus. 



Horns recumbent. 



Hab. Africa. 



N. saliianus. — Of this animal I have seen no skull, but adopt for 

 the present Major Smith's division, as the different direction of the 

 horns is well-marked. It has the suborbital sinus, however, although 

 its absence is assigned as a character by Major Smith. Of the other 

 species included in the subgenus, I have seen but the two young speci- 

 mens upon which Mr. Gray has founded his genus Nanotragus ; they 

 having no horns, I will not here venture to point out their location. 

 The lateral rudimental hoofs are also wanting in at least one species 

 of the last genus, the Oreotragus Tragulus, which Mr. Gray places 

 in his genus Calotragus. 



The skulls of the species of the two following genera are distin- 

 guished from those of the preceding ones by their having no subor- 

 bital fissure, and the fossa being large and not so suddenly pressed 

 in in front of the orbit ; and by the horns (or at least, in one case, 

 the principal pair) being thrown back quite to the posterior edge of 

 the frontal bone. 



Cephalophus. 



No suborbital fissure, a large fossa occupying the whole side of the 

 cheek ; the nasal bones expanded behind, reaching over a little way 

 into the fossa. The other cranial characters as in Oreotragus. 



Horns placed far back, inclined backwards. 



Hab. Africa. 



