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



Skull — basal length 160.; greatest breadth 80 ; orbit to gnathion 

 91-5; nasals, length 69, greatest breadth 34; muzzle 61; upper 

 molar series 50. 



Hab. Cumevoons [Buchholz, fide Peters]. Gaboon [Dm Chaillu 

 (Brit, Mus.)]. 



The type of Gray's C. aureus, which I refer with some doubt to 

 this species, is a young animal, and the differences in coloration 

 are probably due to this cause. Its body is far brighter and more 

 fulvous than that of the adult, the withers and shoulders are browner, 

 and the caudal tuft is more abundantly mixed with white. 



6. Cephalolophus leucogaster. Gray. 



Cephaloj)hus leucogaster. Gray, Ann. Mag. N. H. (4) xii. 

 p. 43 (1873). 



Size medium. General colour dull chestnut-rufous, with a black 

 dorsal band. Face rufous, darker down the centre ; crest mixed 

 rufous and black. Nape browner. Dorsal stripe commencing in 

 front of the withers, not pure black, but grizzled with rufous, and 

 not at all sharply defined laterally. Posteriorly, however, on the 

 tail it becomes abruptly very narrow and sharply defined, not 

 covering the whole breadth of the tail, but bordered on each side 

 with rufous or white. End of tail with a large mixed black and 

 white tuft. Under surface of body from chin to anus, inner sides 

 of forearms and hips, and also a line passing down the anterior side 

 of the metatarsi, whitish or pure white ; no trace of a darker 

 sternal patch. Posterior faces of buttocks also pure white, very 

 different from the deep chestnut of this part in C. dorsalis. 



Horns of type (apparently $ ) conical, sharply pointed. 



Skull, so far as can be gathered from a young and very imperfect 

 example, with a slender narrow muzzle like that of C. do7'salis 

 castaneus, quite unlike the short conical one of C. d. typicus. 



Dimensions of the type, an immature specimen with the milk- 

 premolars still in position, and m" still below the bone : — Height 

 at withers 400 ; ear 65 ; hind foot 203. 



Skull, breadth of m^ at cingulum 10" 1. 



Hab. Gaboon [Dm Chaillu (Brit. Mus.)]. 



7. Cephalolophus dorsalis, Gray. 

 a. Subsp. TYPICUS. 



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

 p. 165 (1846). 



Cephalophus badivs. Gray, Cat. Ung. 1852, p. 85. • 



Cephalophus hreviceps, Gray, P. Z. S. 1866, p. 202. 



Size medium. Ears extremely short and broad. General colour 

 bright chestnut-rufous, with a dark mesial stripe running from the 

 nose to the tail, only interrupted at the crest, which is sometimes 

 rufous. Centre line of face brown ; superciliary streaks bright 

 rufous. Crest variable, either black, mixed black and rufous, or 

 wholly rufous. Dorsal stripe becoming absolutely black on the 



