vir.g three distinct shades of colour on the body : Pennant's animal 

 having the cheeks of a pale bay colour, and the body deep bay above, 

 and pale bay beneath. It might be argued that by 'deep bay' 

 Pennant meant to designate the peculiar colour described by me as 

 black with a rustj- hue : if so, he could scarcely apply the term ' very 

 bright hay ' to the parts which I call yellow. If, however, even this 

 were the case, there is still another distinct tint which he has not 

 mentioned, and that is the bright rust^'-red colour of the sides of the 

 body and limbs. On the whole, therefore, I think I am right in ap- 

 plying a name to the animal here described, -svhich it mustberemem- 

 bered is from a diiFerent locality; that of the BayMonkey being 

 Sierra Leone. There is another circumstance which should lead us 

 to be cautious in pronouncing any species which difFers as much as 

 that here described, as identical with Pennant's animal, since it so 

 happens that each red Colobus discovered has in its turn been re- 

 ferred to the Bay Monkey, or to the Simia ferruginea of Shaw, which 

 is the šame animal, and has hadone or both of these names applied, 

 but has been changed upon the discovery of the next species ; in 

 conseąuence of which much confusion has arisen. I think we had 

 better let the Bay Monkey stand until we can find an animal agree- 

 ing with Pennant's description. 



Colobus Satanas. Col. niger ; vellere longissimo. 



uuc. lin. 



Longitudo capitis corporisgue 31 O 



■' — cauda 36 O 



Hab. Fernando Po. 



" Of this species I have seen three skins from the šame locality; 

 one of these was very imperfect ; the other two were perfect, with 

 the exception of the hands and feet. Its uniform black colour will at 

 once distinguish it either from Colobus leucomeros, or Col. ursinus, 

 the fflrmer having white thighs and a white throat, and the latter 

 having a white tail, and long grey hairs interspersed vnth. the black 

 on the neck. The longest hairs on the back measure ten inches. 

 The fur is but slightly glossy, and the hairs are of an uniform colour 

 to the base. There is no under fur. 



Cercopithecus Martini. Cerc. pilis corporis supra nigro et 

 Jlavescenti-albo annulatis; capite supra, brachiis cauddque ni- 

 grescenūbus ; gula abdovnneque grtseo-fuscescentibus. 



unc. Ha. 



Longitudo capitis corporisgue . . 22 O 



caudce 26 O 



Hab. Fernando Po. 



" Of this animal I have seen but two skins : both very nearly agree 

 in colouring but differ slightly in size ; the dimensions are from the 

 larger specimen. The face, hands, and feet, are unfortunately 

 wanting. It appears to be most nearly allied to Col. nictitans ; the 

 hairs of the upper parts of the body, however, are more distinctly 

 annulated, and the general tint is some^hat greyish. Each hair is 



