412 Zoological Society. 



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 aanulated, 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 gutturosa 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 heing 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. 



