698 MR. R. I. POCOCK A REVISION OF [Juiie 18, 



tSubsi3. LAGLAIZEI, llOV. 



Like the Benito River form, which I regard as typical, but 

 much greyer dorsally, owing to the greater length of the grey as 

 comj)ared with the black annuli on the hairs. In a back hair of 

 C. nictitans laglcdzei, picked haphazard, measuring 80 mm., the 

 viltimate pale annulus measures 4 mm., the jsenultimate 5 mm., 

 and the intervening area about 8 mm. ; whereas in a hair of 

 C. nictitans nictitans, measuring 65 mm., the ultimate pale 

 annulus is 1'5 mm., the penultimate 2 mm., and the intervening- 

 area about 8 mm. These differences are fairly constant. In no 

 case do the pale annuli of the typical form nearly reach half the 

 width of the intervening dark annulus. 



Log. C4aboon [Laglaize coll.). In B.M., Reg, no. 80.6.7.1. 



Cercopithecus MARTINI Waterh. (Plate XXXIX. fig. 5.) 



Gerco2nthecus martini Waterhouse, P. Z. S. 1838, p. 58; 1841, 

 p. 71. 



Cerco'jnthecus luclio Gray, P. Z. S. 1849, p. 8, pi. ix. fig. 2. 



Cercopithecus stamvpflii Jentink, Xotes Leyden Museum, x. 

 p. 10, 1888. 



? Cercopithecus temmincM Ogilby, Is. Geoflfr. St. H. Diet. Hist. 

 Xat. iii. p. 303, 1845. 



Skin of face (diied) black ; lijDS clothed with short whitish 

 hairs ; nose-spot large, white ; hairs on cheek and sides of neck 

 speckled black and j-ellowish. Head speckled black and yellow 

 on forehead, the yellow speckling more pi'onounced than on 

 cheeks ; on the crown of the head, the nape of the neck, in 

 front and behind the ears the yellow speckling much less con- 

 spicuous, the black largely predominating owing to the disappear- 

 ance of the distal yellow annuli. Back from behind the shouldei' 

 to the root of the tail densely speckled with yellowish grey, which 

 predominates over the black. Arms black extei'nally. Legs darker 

 than back but speckled ; hands and feet black. Throat and chest 

 dirty greyish white ; the pale area of the throat separated from 

 that of the chest by a faint blackish band ; the pale area of the 

 chest extending in a point backwards to the end of the sternum, 

 and spreading on to the base of the arms on the inner side. 

 Belly dark smoky grey, faintly speckled, the colour becoming- 

 paler posteriorly and upon the inner side of the thighs. A con- 

 siderable quantity of rusty-red hair upon the ischio-j^ubic region. 

 Tail Avith its basal fourth like the sacral ai-ea ; some reddish 

 bail's b}- the anus beneath ; the distal three-fourths black. 



Loc. Liberia to the Cameroons. 



Cercoiyithecus martini was based upon a native-prepared and 

 imperfect skin, with the face and other parts cut away. It is in 

 the British Museum, and is labelled " Ferntindo Po." It does not 

 appear to be specifically or subspecifically separable from the 

 form named C. hccUo by Gray. Cercopithecus stampflii was de- 

 scribed as distinguishalDle from C. nictitans by having white- 

 coloured underparts, but in the description only the chin, bren?;t, 



