426 MR. O, THOMAS ON THE ANTELOPES [May 17, 



2 . Entirely absent in the only specimen available (not fully 

 adult). No traces of horn-cores are to be seen on the skull, and 

 probably the female is always without them. 



Skull broad and strong. Muzzle rather narrow. Anteorbital 

 foss8e rather shallow, their bottoms about 14 mm. apart in an adult 

 male. Mesial notch of palate only about 4 or 5 mm. in advance of 

 the lateral ones. 



Dimensions. — S • Height at withers 350 ; ear 50 ; hind foot 1 70. 



Skull (c?) — basal length 120; greatest breadth 63; anterior 

 edge of orbit to gnathion 69 ; nasals, length 47, breadth 24*5 ; 

 muzzle 40*5 ; upper molar series 41 '5. 



Hab. W. Africa. Gambia {Whitfield (Brit. Mus.)] ; Sierra 

 Leone {Sabine (Brit. Mus.)] ; Liberia [Buttikofer (Leyd. Mus.)] ; 

 Fantee {Aubinn (Brit. Mus.)] ; Dabocrom, Gold Coast [Pel (Leyd. 

 Mus.)]. 



This species shows a certain tendency to the peculiar coloration 

 of the rump characteristic of C. melanorheus ; the colour contrasts 

 of black and white of the latter, however, are only in its case dark 

 brown and light brown respectively. 



Theentireabsenceof the horns in the female is a very important 

 character, but merely on the evidence of a single specimen, and 

 that one not fully adult, I hesitate to give it definitely as one of the 

 characteristics of the species. 



14. Cephalolophus melanorheus, Gray, 



Cephalophus melanorheus, Gray, Ann. Mag. N. H. (1) xviii. 

 p. 167(1846). 



Cephalophus anchietce, Bocage, P. Z. S. 1878, p. 743. 



Similar in all respects to C. maoBwelli, except that it is rather 

 smaller, and that the brown colour of the back darkens to black on 

 and at each side of the base of the tail, below which there is an 

 abrupt change to white on the backs of the haras. Female with 

 horns. 



Horns short, but almost as long in the female as in the male, placed 

 in the same straight line as the nasal profile, slightly incurved : — 



(S about 40 mm. long, basal diameter going about 2| times in 

 the length. 



5 about 30 or 35 mm. long, basal diameter going about 3 times 

 in the length. 



Dimensions. — Height much as in next species. Ear 40 ; hind foot 

 155. 



Skull ( (S ) — basal length (c.) 1 16 ; greatest breadth 60 ; anterior 

 edge of orbit to gnathion 63 ; nasals, length 44, breadth 23; muzzle 

 40 ; upper molar series 37. 



Hab. Southern half of West- African Forest-region from the 

 Cameroons [Burton, Crossley (Brit. Mus.) ; Preuss ^ Morgan (Berl. 

 Mus. fide Matschie)] and Fernando Po [T. Thomson (Brit. Mus.)] 

 to Angola [Anchieta (Lish. Mus. fide Bocage)]. (No doubt also 

 extending across the continent in the Equatorial Forest-region.) 

 Island ot Zanzibar [KirJc (Brit. Mus.)]. 



