1866.] DR. J. E. GRAY ON A NEW SPECIES OF NASUA. 1C9 



Cercopithecus ERYTHROGASTER. (PI. XVI.) 



Fur blackish, minutely punctated with yellow ; the yellow dots on 

 the crown of the head more abundant, and nearly absent on the 

 hands and wrist ; outside of the hind legs and thigh grey, punctured 

 with blackish ; face, moustache, and the frontal band, which is con- 

 tinued across the temple to the ears, black ; round spot on each 

 cheek pale yellow ; whiskers, beard, throat, and sides of neck white ; 

 front of thighs and under surface of the tail greyish white ; chest 

 and belly red brown. 



Hab. West Africa. 



There is a young female of the species in the Gardens of the Society. 



The red belly and chest, the white beard and whiskers, and the 

 black frontal band at once distinguish this species. The yellow 

 crown is ver} - peculiar ; it is rather extended backward towards the 

 nape,, and separated from the fur of the back by an undefined black- 

 ish crescentiform band. 



2. Notice of a New Species of Nasaa. 

 By Dr. J. E. Gray, F.R.S., V.P.Z.S., F.L.S., &c. 



(Plate XVII.) 



Mr. Whiteley, of Woolwich, has lately brought to the British 

 Museum the skin of a Nasua, which differs considerably from any 

 skin of the genus that I have hitherto seen, in having a distinct 

 broad black streak along the hinder part of the back to the base of 

 the tail. I believe that it may belong to a distinct species ; at any 

 rate it presents a variation in colouring of this variable genus that I 

 have not seen described. The fur is reddish brown. There are two 

 specimens which agree with it in general colouring and kind of fur 

 in the British Museum collection, but they are without the dorsal 

 streak. 



Nasua dorsalis. (PI. XVII.) 



Fur red brown ; underfur dull brown, longer hairs thin, pale, with 

 thick red- brown tips ; chin, throat, and chest whitish ; face pale, 

 blackish-grizzled ; feet and broad streak on hinder half of the back 

 black ; tail blackish, with irregular interrupted grey rings. 



The skull is imperfect, the face with the teeth only having been 

 preserved. The face resembles that of the skull of Nasua narica in 

 the Museum Collection, no. 225 a (the measurement of which is 

 given in my paper on UrsiJa, P. Z. S. 1864, p. 70,'i), in haying a 

 long narrow compressed nose and elongated canine teeth. It differs 

 from the skull of N. narica in the upper jaw being rather shorter 

 from the middle of the cutting-teeth to the end of the last molar, 

 and rather wide at the hinder part at the sides of the hinder molars, 

 and rather narrower at the end of the nose. The upper cutting- 

 teeth are narrower ; that is to say, the space occupied by the series 



Pruc Zool. Soc— 1866, No. XII. 



