SENIOCEBUS 189 



Seniocebus maetinsi (Thomas). 



Leontocebus martinsi Thos., Ann. Mag. Nat. Hist., 1812, 8th Ser., 

 XI, p. 84. 



Type locality. Faro, Lower Yamunda River, Brazil. 



Genl. Char. "Precisely like L. bicolor, except that the head and 

 fore limbs are of normal coloration, corresponding to the rest of the 

 animal, not sharply contrasted white. 



Color. "Head (in adult) nal<ed from crown to chin, the skin black. 

 Scanty hairs of back of crown and the nape black or brownish black. 

 General color of back and sides isabella, darkened along the dorsal 

 area, the middle posterior back almost blackish. Under surface tawny 

 ochraceous, duller anteriorly, richer posteriorly. Ears quite naked, black. 

 Arms proximally isabella. buffy yellowish on forearms, hands cream- 

 buff or rather more yellowish ; whole inner side of arms ochraceous. 

 Hind limbs externally isabella, becoming suffused with tawny towards 

 ankles; inner aspect rich ochraceous, tending towards ochraceous 

 rufous. Feet yellowish buffy. Tail black above nearly to the tip ; 

 under-side and end sharply defined ochraceous. 



"Young specimens with the crown well-haired, blackish mixed with 

 grayish ; face and chin thinly haired, grayish ; ears with black hairs 

 about half an inch in length. 



Measurements. "Head and body, 208 mm. ; tail, 366 ; hind foot, 

 61; ear, 31. Skull and teeth essentially as in L. bicolor; occiput to 

 gnathion 51; basion to gnathion 36; zygomatic breadth 35.5; breadth 

 across orbits 28.8 ; breadth of braincase, 27.5 ; length of upper cheek- 

 tooth-series 10." 



