1907.] MONKEYS OF THE GENUS CERCOPITHECUS. 727 



Cercojnthectis sahams Wagnei', Martin, Matschie, and other 

 authors. 



Chlorocehus sahanis Gray, Cat. Monkeys Brit. Mus. p. 25, 

 1870. 



Cercojnthecus )A)erneri Is. Geoffr. St. H., C.R. Acad. Sci. xxi. 

 p. 874, 1850 ; id. Cat. Method. Mamm., Primates, p. 23, 1851 ; 

 id. Arch. Mus. v. p. 539, pi. xxvii., 1851. 



Cercopithecus callitrichus Is Geofir. St. H., Cat. Method. Mamm., 

 Primates, p. 23, 1851 ; and ot Reichenbach, Sclater, Forbes, and 

 most recent authors. 



Face and lips black, scantily clothed with black hairs. No white 

 brow-band except sometimes an indistinct one formed by the 

 greyish basal portion of the hairs. Whisker-hairs yellow and 

 strongly contrasted in colour with the haii-s of the top of the head : 

 their mode of growth chaiucteristic ; they run vertically upwards 

 in front of the ear and hoi-izontally backwards beneath it, so that 

 the ear and a varying amount of the cheek in front of it are 

 left uncovered. Colour of dorsal area of head and body greenish, 

 resulting from the yellow and black annulation of the individual 

 hairs, the varying width of the yellow annuli — of which there is 

 frequently only one — causing a corresponding variation in the 

 greenness of the pelage. Limbs greyer than the back ; hands 

 and feet grey, not black or bi'own. Tail darker than the back 

 above, bright yellow at its distal end ; the root of the tail 

 beneath, the scrotal ai/ea in the male, and the pubic area in the 

 female with intenser, sometimes almost rufous-yellow hairs. 

 Throat, chest, and belly greyish or yellowish white. Scrotum 

 slate-blue. 



Log. Senegambia, Sierra Leone, and Noi-thern Liberia. Also 

 introduced into some of the Cape Verde and West Indian Islands, 

 and still abundant at least in Barbados. 



This is one of the commonest Monkeys in European menageries. 



Although of recent years this species has been universally cited 

 as C. callitrichus, I can find no valid reason for setting aside the 

 conclusion of earlier authoi's that scdxeus is its earliest specific title. 

 Even if it be established that Linupeus confused more than one 

 species under that name, one of those species was certainly the 

 Monkey that was subsequently desci-ibed as C. callit7-ichus. 

 Hence Schreber and Erxleben, who followed Linnseus, were 

 acting within their rights in assigning the name sabceus to that 

 species. 



Even if sabceus be rejected, the well-known name callitrichus 

 cannot, in m.y opinion, be retained, because it is antedated by 

 werneri, which, judging from Geoffroy's figure and description of 

 the type, was given to a redder form at most only subspecifically 

 distinct from the type of C. callitrichus. 



