18/1.] DR. J. E. GRAY ON THE BUSH-BUCKS. 593 



of my C. longiceps (P. Z. S. I860, p. 205). The ears are moderate, 

 rounded at the end, the outer surface covered with very short, close, 

 deep-brown hairs, nearly naked within, except at the edge and end, 

 which is bordered with short whitish hairs. Upper surface of the 

 head pale brown, the nose deep brown, and forehead chocolate ; 

 the upper parts of the cheeks are grey-brown, the lower part and 

 chin whitish ; a narrow, dark-edged, yellow-brown ray above the 

 eye, and an elongate spot of the same colour under the orbit. The 

 crest is divided into a central and lateral portions. The central 

 portion is bright red, the lateral ones of hairs of two lengths, the 

 shorter dark brown, and the longer bright red. 



He originally named this species Cephalophus ruficrista, but he 

 has now changed it to C. longiceps. 



b. Antilope altifrons, Peters, Mossambique, p. 18-1, t. 38. f. I 

 (skull of male). 



Hab. Mozambique {Peters). 



I see M. Bocage refers this figure to this group (I. c. p. 221). 



3. Cephalophus. (Bush-goats.) 



Horns conical, recurved or ascending, short, and generally angular 

 at the front of the base. Ears moderate, rounded at the end, covered 

 with short hair. Skull short ; forehead convex, swollen ; nasal bones 

 triangular, wide behind and narrow and acute in front ; preorbital 

 pit very large. (Cat. Ungulata, t. 10. f. 1 \jiatalensis~\, skull.) 



Fur varies greatly in different specimens. In some it is thin 

 and closely adpressed, formed of more or less flattened hairs, which, 

 in C. nigrifrons, are very broad and tapering to a point. In some, 

 with the adpressed fur, as C. ogilbii, C. natalensis, and C. niger, 

 the cheeks and neck have only extremely short fine hair on them ; 

 others, as C. nigrifrons, have these parts covered with broad 

 hairs like the body. Others are clothed with abundance of cylin- 

 drical hairs, varying in different degrees of softness ; in some they 

 are more bristly, as in C. sylvicultrix, in others soft, sometimes 

 with a few bristly hairs intermingled, as in C. pygmceus, C. max- 

 wellii, and 0. melanorheus. One species (C. melanoprymnus), which 

 has a thick coat of moderately soft fur, has a crest of much longer 

 hair extending along the whole length of the vertebral line, and a 

 patch of softer hair over the base of the tail. 



I have made some remarks on the differences between the skulls 

 of the various species of this genus in the observations appended to 

 the description of C. longiceps (P. Z. S. 18G5, p. 255). 



The specimens from Gaboon here described were purchased of M. 

 du Chaillu. I do not find them mentioned in his published travels, nor 

 in the list of animals which was published in America. Indeed in 

 his journals he says there are no Antelopes found in that part of 

 Africa ; but perhaps he does not consider Bush-bucks Antelopes. 

 I suppose they are common, as he used the skins with the imper- 

 fect skin of his Potamochcerus albifrons to stuff out the body of his 

 Tragelaphus albovittatus, in the skin of which they were sewn up. 



Proc. Zool. Soc— 1871, No. XXXVIII. 



