169 
seen skulls of only two species, I will content myself at present with 
adopting only the two genera of Major Smith; using however, for 
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 Oreotragi; 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. 
Hab. Africa. 
O. saltatriz. 
O. scoparius. | Of these two species I 
O. tragulus. have seen skulls. 
O. melanotis. 
NEOTRAGUS. 
Horns recumbent. 
Hab. Africa. 
N. saltianus.—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 
haying 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 
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