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



"Cephalophus badius, 418 c"; and its skull was figured by him 

 under that name \ As, fortunately, the types of his C. badius and 

 breviceps are both still in the Museum, I am able to state that it 

 belongs certainly to neither of them, but its proper determination has 

 caused me much perplexity. On the one hand, its skull, so far as 

 one may judge from a single immature specimen, is so different from 

 similarly aged specimens uf C. dorsalis as apparently to demand full 

 specific distinction ; while, on the other hand, it is externally almost 

 precisely identical. For the present, therefore, I take a middle course, 

 and make it into a subspecies, trusting that further specimens from 

 different localities will clear up the precise relationship it bears to the 

 true G. dorsalis, and also to its close ally C leucogaster. 



8. Cephalolophus ogilbyi, Waterh. 

 Antilope ogilbyi, Waterh. P. Z. S. 1838, p. 60. 



Size medium. General colour bright orange, becoming rather 

 more rufous on the hind-quarters. Nose brown, but otherwise the 

 face is of the same colour as the body. Nape and sides of neck 

 brown or blackish, but the hairs here so thin and short that the 

 skin shows through and the general colour is but little affected. 

 Hinder back with a marked black central dorsal streak, commencing 

 vaguely at the withers, becoming narrower "and more sharply defined 

 posteriorly, and running on to the tail. Limbs dull yellowish, 

 except on the phalanges, where they are brown or black. 



Horns in the direct line of the nasal profile : — 



S . About four inches long (109 mm.), conical, slightly incurved, 

 much broadened basally, their greatest basal diameter going 2^ or 

 3 times in their length. 



$ . About a inch and a half in length, conical, smooth, broad at 

 base, pointed terminally, their length not twice their basal diameter. 



Skull with a very considerable convexity in the frontal region. 

 Anteorbital fossae shallow, their bottoms 2'6 mm. distant from one 

 another in a male, 19 in a female. Posterior palate with the three 

 notches, median and two lateral, all at about the same level. 



Dimensions. — S- Height at withers .560 mm.: ear 7^; hind 

 foot 240. 



Skull (cJ, not fully adult) — basal length 185; greatest breadth 

 90; orbit to gnathion 112; nasals, length 88, greatest breadth 37 ; 

 muzzle 69 ; upper molar series (c.) 60. 



Hab. West Africa. Liberia [ButtiJcofer and Stampjli (Leyd. Mus.), 

 fide Jentiuk]; Canieroons {^Preuss (Berl. Mus.), fide Matschie] ; 

 Fernando Po [G. Knapp, T. Thomson, R.N. (Brit. Mus.)]. 



9. Cephalolophus callipygus. 



Cephalophus callipygus, Peters, MB. Ak. Berl. 1876, p. 483, 

 pis. iii. & iv. (animal and skull). 



Size about as in C. dorsalis. General colour of body yellowish 

 brown, becoming more rufous posteriorly. Forehead and crest 

 ^ T. c. pi, XXX. fig. 1. 



