1892.] OF THE GENUS CEPHALOLOPHUS. 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 b}^ 

 the identification of G. melanoprymnus witli it, is here of importance 

 as confirming m}' allocation of " (J. 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, axillae, 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 G. sylvicultor : — 



$. 155 mm. long, base not specially thickened, basal diameter 

 going about 5| 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 G. 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 diflferences that I 

 am able to find between the two skulls. The frontal outline is 

 flatter, and the horn-cores are perfectly straight, not bowed down- 

 wards 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 infra- 

 orbital 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 ex- 

 tension 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 G. sylvicultor, 

 including the type of C. longiceps, agree absolutely with each other, 

 and differ from the single skull before me of G. jentinki. 



Dimensions. — $ . Height at withers 770 ; ear 105 ; hind foot 

 310. 



Skull — basal length 267; greatest breadth 126; outer rim of 



