2 
may be recognized and defined, we think it better to allow six genera in all, 
the distinguishing points of which are shown in the following synopsis :— 
A. Nose not specially elongated, its tip with a distinct naked muffle. Crown 
not tufted. 
a. Hoofs cylindrical, not pointed, the animal standing more or less on their 
tips. Hairs thick and pithy like those of a Musk-Deer. Horns 
Vertical: ac. <a eee . . .  2 el) ORKOTRAGUS: 
b. pees triangular, pointed, as in nib Antelopes. Hairs normal. 
. A naked glandular spot below ear. Accessory hoofs present. Ante- 
orbital fossa of skull very large . . . . . . 2. OURBEBIA. 
U'. No glandular spot below ear. Accessory hoofs absent (except in 
Raphicerus melanotis). 
a?. Horns nearly vertical. Anteorbital fossa small. 3. RAPHICERUS. 
6°. Horns lying back nearly or quite to profile-line of face. Ante- 
orbital fossa large. 
a®. Horns reaching to or past back of head. Anteorbital and nasal 
vacuities present . . . . . . . 4. INESoDRAGUS: 
63, Horns not nearly reaching nace of head. No anteorbital or 
nasal vacuities . . - . « « = «= O- NHOTRAGUS: 
B. Nose elongated, its tip hairy Found ie nostrils. Crown tufted. 
| 6. Mapogqua. 
The recently discovered Beira Antelope of Somaliland (Dorcotragus 
megalotis) might also be supposed to be a member of this subfamily; but, 
after a careful consideration of its characters, we think it may best be 
regarded as an aberrant Gazelle, and as such we therefore propose to treat 
it. ‘The undeniable resemblance that the nasal region of its skull shows to 
the same part in M/adoqua appears, on the whole, more likely to be due to 
purely adaptive modification than are the various characters which it possesses 
in common with the members of the Gazelline group. DSI 
