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rally suddenly pressed in before the orbit. The genera are as fol- 
lows :— 
ANTILOPE. 
No suborbital fissure nor fossa*, but a wide opening on the side of 
the muzzle, between the maxillary and intermaxillary bones ; the 
masseteric ridge rising before the orbit ; the auditory bulla large and 
prominent, with only a small groove on its outer side to receive the 
attachment of the stylohyal bone; the occiput broad, somewhat 
produced downwards; its basal portion with the posterior pair of 
tubercles broad, the anterior ones small. Molars without the supple- 
mental lobe. 
Horns annulated, curving outward from the base, then bending 
backwards and towards the tip upwards. 
Hab. South Africa. 
A. Melampus.—Of this single species, to which modern zoologists 
have confined the old generic name, I have only seen skulls of the 
male, in Mr. Cumming’s collection: the lower jaw, as in most of his 
skulls of Ruminants, being wanting in all of them, I could not ascer- 
tain the character of the incisive teeth. 
Major Smith assigns a suborbital sinus to this genus, making the 
principal distinction from the next to consist in the absence of horns 
in the female, thus associating with it the guttwrosa and colus, be- 
longing properly to the next genus,—the cervicapra, which it seems 
most convenient to separate,—and the adenota, which I must now 
refer to the genus Eleotragus. With his A. forfex I am at present 
unacquainted. Melampus alone remains, to which Mr. Gray rightly 
assigns no “‘tear-bag ;” this, together with the horns, must be the 
external character of the genus, if, indeed, it be essentially distinct 
from the Gazelles, for the horns might be considered as a distorted 
modification of the lyrate type, and some species of that genus seem 
to want the suborbital sinus. 
GAZELLA. 
A suborbital fissure, and a moderate, or very slight fossa, sud- 
denly pressed in before the orbit ; the masseteric ridge rising before 
the orbit ; the auditory bulla large and prominent ; the basioccipital 
bone having its tubercles moderately or but little developed; the 
median incisors expanded at their summits; the molars without sup- 
plemental lobes. 
Horns annulated, more or less resembling an inverted lyre ; that is, 
bending a little outwards soon after their origin, and again inwards 
towards the tip. 
Hab. Eastern Europe, Asia and Africa. 
* I here use these terms with reference only to the skull, the fissure being that 
opening existing in most Ruminants, filled up during life by membrane, between 
the nasal, frontal, lacrymal and maxillary bones; and the fossa, the depression 
upon the surface of the lacrymal bone immediately before the orbit, generally 
affording some indication as to the existence and structure of the suborbital sinus. 
