448 Zoological Society. 



parts of the hips on each side of the callosities of a deep purple or 

 violet-brown ; the scrotum is brown, and the sheath of the penis 

 flesh-coloured. The tail is of medium length, without a terminal 

 tuft, and carried in the arched manner common to the rest of the 

 genus. The hind surfaces of the legs and thighs are furnished with 

 long hair of a yellowish brown shade ; the hands are of the same 

 colour as the body, but the hind fingers are covered with longish 

 grey hairs, and this character, together with the dark purple colour 

 of the naked hips and brown scrotum, will always be sufficient to 

 distinguish the present species from C. anubis and C. sphinx, in both 

 of which the naked parts of the buttocks are of a brilliant blood-red, 

 and the scrotum pale flesh-colour. In colour indeed C. Thoth ap- 

 proaches more nearly to C. sphinx than to C. anubis ; it has the same 

 light silvery grey colour on the whiskers and under part of the body, 

 but the upper colours are more obscure ; the bright yellowish green 

 is replaced by sordid dunnish brown, and the proportions of the two 

 animals are entirely different, the long slender limbs and body of the 

 sphinx contrasting strongly with the massive thick-set form of the 

 present species. 



" There is likewise in the Society's Gardens a second undescribed 

 species of Cynocephal, of which I remember to have formerly seen a 

 specimen in Wombwell's collection, but unfortunately neglected to 

 take a note of it at the time. The individual which I am now about 

 to describe was brought from the Niger Expedition, and presented 

 to the Society by Lieutenant Webb, R.N. It is a semiadult male, 

 of medium size, covered on every part of the body, both above and 

 below, with long shaggy hair of a deep russet-brown colour, each 

 hair l)eing annulated with rusty- brown and black rings ; and I may 

 remark, that this and C. anubis are the only species in which I have 

 observed that the hair of the breast and belly are similarly annulated, 

 and almost as thickly furnished as that on the back and sides ; the 

 whiskers are likewise bushy, of the same colour as the hair of the 

 back, and similarly annulated ; but it should be observed, that from 

 the very dark shade of the colours the annuli are but little conspicu- 

 ous anywhere. The face is more slender and tapering than in any 

 other male Cynocephal that I have ever seen ; the cheek-bones are 

 but little prominent, but the nose sensibly surpasses the extremity 

 of the muzzle. The face and space surrounding the eyes are black 

 or dark brown, the upper eyelids alone flesh-coloured ; the ears and 

 palms of the hands, as are likewise the upper sides of the fingers, the 

 scrotum, callosities, and naked parts of the buttocks, are of the same 

 colour. The hair of the head, whiskers and fore-parts generally is 

 erect and bushy, and completely conceals the ears. This species is 

 allied to C. anubis, but difters from it in the colour of the hair, in the 

 absence of the light flesh-coloured circle about the eyes, and in the 

 dark brown instead of blood-red colour of the callosities and naked 

 parts of the buttocks. I propose to distinguish it by the name of C. 

 chorus, a name which is applied to this or some other species of Ba- 

 boon on the west coast of Africa, and which has a sufficiently classical 

 form, to escape the censure of barbarism, notwithstanding its origin." 



