4. CEPHALOpnrs. 25 



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 L'ephalophiis 

 nijicrista, but has now changed it to C. lonyiceps. 



h. Antilope altifrons, Peters, Mossambique, t. 38. f. 1 (skull of 

 male). Hah. East Africa : Mozambique. The figure of the skull is 

 very like my T. lon</iceps; but, coming from Madagascar, it may be 

 distinct. 



3. POTAMOTRAGUS. 



Horns ? Forehead crested. Ears rounded, hairy. Back with 



a vertebral crest of long hair. Rump and buttocks covered with a 

 patch of soft hair. Hoofs triangular. Skull : — forehead convex ; 

 nasal bones united into one disk, triangular, broad behind, narrow 

 and acute in fi-ont. (P. Z. S. 1871, p. 594, f. 2 & 3, $ , skull.) 



* © 1. Potamotragus melanoprymnus. B.M. 



Fur rather long, soft, grizzled by the subterminal white rings on 

 the dark brown hairs ; hair of outside of Umbs, especially of the 

 middle of the back, longer, scarcely grizzled ; rump with a large 

 oval disk of black hair ; legs dark brown ; ears moderate, hairy. 



Cephalophus melanoprymnus, Gray, F. Z. S. 1871, p. 594, f . 2 & 3 

 (skull), pi. 44 (auimal). 



Hah. Gaboon. 



This specimen is a very young male, which evidently grows to a 

 large size. The skuU with only three grinders, which are of a very 

 large size for the genus. The nasal bones are united, without any 

 appearance of a suture, while all the other sutures of the skull are 

 distinct, forming a triangular disk, which is broad behind and pro- 

 duced into an acute tapering point in front. The frontal bones are 

 convex, but not so prominent and swollen as in older skulls of other 

 species. 



Differs from Cephalophus sylvicidtnx and niger in having the very 

 distinct black patch over the base of the tail, and also in the much 

 greater length and softness of the fur. The fur of C. sylvicuUrix is 

 slightly grizzled. 



4. CEPHALOPHUS. 



The ears moderate or short, rounded at the end, moderately 

 covered with hair. Horns short and more or less decumbent. Skull 

 shorts ; forehead convex, arched ; nasal bones separate, broad behind, 

 narrow and acute in front. (Gray, Cat. Ungul. B. M. p. 82, t. 10. 

 f. 1, skuU; P. Z. S. 1865, p. 204, 1871, p. 593, f. 4-8, skulls.) 



a. Back with a large yellow stripe. 1. C. sylvicuUrix. 



h. Back with a black dorssil streak. 2. C. Oyilbi/i; 3. C. badius; 4. C. 



rufilafus. 

 c. Back with a blackish saddle, o. C. dorsalin. 



