156 
only interrupted at the crest, which is sometimes rufous. Centre line of face 
brown; superciliary streaks bright rufous. Crest variable, either black, 
mixed black and rufous, or wholly rufous. Dorsal stripe becoming absolutely 
black on the back, sometimes sharply defined throughout, sometimes 
broadening out on the withers into an ill-defined band passing down the 
shoulders towards the fore legs. Under surface, inner sides of limbs, and 
back of hams rufous like the sides; a black or blackish longitudinal patch 
present in the sternal region. Fore limbs brown, from the shoulder down- 
wards, hind limbs from just above the heel. Tail black above throughout, 
the black covering nearly the whole breadth of the tail, white beneath 
terminally. 
Horns placed about in the same straight line as the nasal profile, those of 
male about 2°8 inches long, slender, tapering, not thickened or roughened 
basally, the basal diameter going nearly five times in the length. 
Skull with a remarkably short conical muzzle, the distance from the anterior 
rim of the orbit to the muzzle less than the zygomatic breadth. Anteorbital 
fossee of medium depth. Mesial notch of palate about 4 inch in advance 
of the lateral ones. 
Dimensions :— ? (not fully adult). Height at withers 15 inches, ear 1°8, 
hind foot 6°7. 
Skull: basal length (c¢.) 5-5 inches, greatest breadth 3:2, orbit to muzzle 3. 
Hab. West Africa, from Sierra Leone to the Gold Coast, replaced in the 
- Cameroons by C. d. castaneus. 
Subspecies 6. C. D. CASTANEUS. 
Rather larger than C. d. typicus, and ears apparently rather longer. 
Colour deep chestnut all over, the dorsal line deep black, the metacarpals 
and metatarsals brown. Superciliary stripe chestnut, indistinct, far less 
bright than in C. d. typicus, and the general colour of the head darker and 
duller. 
Skull with the muzzle of the ordinary slender elongate shape, the distance 
from the anterior edge of the orbit to the muzzle exceeding the zygomatic 
breadth. Teeth decidedly larger than in the typical form. 
Dimensions of the type, an immature female:—Height at withers 19 inches, 
ear 2°4, hind foot 8. 
