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Show 1892.] OF THE GENUS CEPHALOLOPHUS. 421 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 downwards, hind limbs from just above the heel. Tail black above throughout, the black covering nearly the whole breadth of the tail ; white below terminally. Horns placed about in the same straight line as the nasal profile :- <$. About 70 m m . 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 gnathion less than the zygomatic breadth. Anteorbital fossae of medium depth, their bottoms 19 m m . distant from one another in a not fully mature female, Mesial notch of palate about 4 or 5 m m . in advance of the lateral ones. Bullae with a small supplementary inflation, something like that distinguishing C. jentinki from C. sylvicultor. Dimensions.- $ (not fully adult). Height at withers 370; ear 4 7 x 4 4 ; hind foot 170. Skull-basal length (c.) 143 ; greatest breadth 81 ; orbit to gnathion 77 ; nasals, length 55, greatest breadth 32 ; muzzle 46 ; upper molar series (milk-teeth in place) 52. Hab. W . Africa from Sierra Leone to the Gold Coast. Replaced in the Cameroons by subsp. castaneus. Sierra Leone [Whitfield (Brit. Mus.)]; Liberia [Buttikofer and Stampfii (Leyd. Mus.)]; Fantee [Aubinn (Brit. Mus.)]. b. CEPHALOLOPHUS DORSALIS CASTANEUS, subsp. n. Rather larger than var. typicus, and ears apparently rather larger. Colour deep chestnut all over, the dorsal line deep black, the metacarpals and metatarsals brown. Superciliary stripe chestnut, indistinct, far less bright than in var. 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 gnathion exceeding the zygomatic breadth. Bullae with scarcely a trace of the extra inflation behind the base of the stylohyal. Teeth decidedly larger than in the typical form, the combined lengths of the three milk-premolars 30*3 as against 25'5 in a similarly aged example of C. d. typicus. Dimensions of the type, an immature female.-Height at withers 485 ; ear 6 0; hind foot 205 ; tip of muzzle to eye 106. Skull-basal length (c.) 159 ; greatest breadth 83 ; orbit to gnathion 90 ; nasals, length 70, breadth 35 ; upper molar series (milk-teeth still in place) 60. Hab. Cameroons [Crossley (Brit. Mus.)]. This subspecies is based on the female specimen called by Gray l 1 Hand-1. Bum. p. 94 (1873). |
