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Show 1892.] OF THE GENUS C E P H A L O L O P H U S . 417 very much to excuse Dr. Gray in his supposition that the young " melanoprymnus" represented a different species. The occurrence of C. sylvicultor on the Gaboon, as evidenced by the identification of C. melanoprymnus with it, is here of importance as confirming m y allocation of " C. longiceps," also from the Gaboon, to its synonymy. The typical skull of the latter agrees in every respect with a Fantee skull of C. sylvicultor, although it is, as Gray said, somewhat slenderer in the nasal region than the only skull which he then had for comparison with it. 2. CEPHALOLOPHUS JENTINKI, sp. n. Size large, though smaller than C. sylvicultor ; form stout. Ears short, broad and rounded. Colour of head, ears, neck all round as far back as the withers, throat, and a narrow sternal line deep uniform black ; of body above and below coarsely grizzled grey, the hairs ringed with black and white. Lips and chin, a line all round the fore-quarters separating the black from the grey, axilla?, groins, fore and hind legs whitish; a rather darker mark running across the outer side of the forearm. Horns long, tapering, placed in the line of the nasal profile, divergent as in C. sylvicultor :- $.155 m m . long, base not specially thickened, basal diameter going about 5j times in the length. Skull much longer in proportion to the size of the animal than in C. sylvicultor, agreeing, in fact, precisely in size with that of the larger species. In other respects also it agrees so closely with that of C. sylvicultor, that had the external characters not been known the two species would have been hardly supposed to be different. Such as they are, however, the following are the differences that I am able to find between the two skulls. The frontal outline is flatter, and the horn-cores are perfectly straight, not bowed downwards terminally ; the facial region above the tooth-row and below the anteorbital fossa is markedly swollen out laterally, so that the teeth and their alveoli for a vertical height of nearly an inch are quite hidden in an upper view of the skull; the outer edges of the infraorbital foramen are rounded instead of being sharp ; the three posterior notches in the palate, approximately equal in breadth in sylvicultor are very unequal in jentinki, as the lateral ones are broad, shallow, and open, while the mesial one, and with it the whole posterior nares, is markedly narrower; the bullae have, just behind the articulation of the stylohyal, a very marked secondary inflation, projecting outwards and forwards and cutting off the extension backwards of the bony lamina external to the articulation ; this extra swelling is quite absent in C. sylvicultor. In all these characters, slight as they seem to be, the five skulls of C. sylvicultor, including the type of C. longiceps, agree absolutely with each other, and differ from the single skull before me of C. jentinki. Dimensions.- $ . Height at withers 770; ear 105; hind foot 310. Skull-basal length 267; greatest breadth 126; outer rim of |
