256 Mr. J. E. Gray on some new Genera 



not hitherto been recorded. The greater part of them are in 

 the collection of the British Museum. 



Yours very truly, 

 R. Taylor, Esq. J. E. Gray. 



Fam. Simiad^;. 



Presbytis nobilis. Bright rufous, without any streak on the 

 shoulders. 



Hab. India. Brit. Mus. 



This species differs from the Simia melalophus of Raffles in being 

 darker, and not having a black crest ; from P. flavimanus in being of 

 a nearly uniform auburn, and not yellow, with a blackish back, and 

 in having no black streak across the shoulder or on the cheek. 



Cercopithecus Burnettii. Grayish black ; head, neck, and upper 

 part of the back yellow dotted ; throat, cheek, abdomen, inner sides 

 of fore legs and thighs grayish white ; face black ; hair of cheek and 

 forehead yellow, with a small tuft of black hair over each eye ; fur very 

 thick ; hairs long, rather rigid, pale at the base, then grayish black ; 

 those of the head, neck, and upper part of the back and base of the 

 tail with two or three broad yellow- brown subterminal bands. 

 Length of body and head, 19 inches ; tail end injured. 



Hab. Fernando Po, Thomas Thomson, Esq., R.N. 



Fam. Cebidjs. 



Pithecia Pogonias. The face hairy ; forehead and cheek with long 

 close- set yellow hair ; face surrounded with black hair ; hairs of the 

 back and limbs blackish, with a broad white subterminal ring. 



Hab. Brazils. Brit. Mus. 



This species differs from P. leucocephalus, with which it agrees in 

 having a hairy face, in the hair of the body not being pure black ; 

 and from P. irroratus in the face, cheeks, and forehead not being 

 naked. 



The two species of Douroucouli are evidently distinct ; they may be 

 characterized thus : — 



Nyctipithecus trivirgatus (N. vociferus, Spixl). Pale ; forehead 

 with three narrow converging streaks meeting on the nape, the side 

 ones extended on the cheek ; tail rather darker. 



Hab. Brazils. Brit. Mus. 



Nyctipithecus felinus, Spix, Cheirogaleus Commersonii, Vigors and 

 Horsfield. Gray -brown ; tail blackish, reddish at the base ; face and 

 a triangular spot over each eye white, with a black streak on each 

 side and a broad rhombic spot in the centre between them on the 

 forehead. 



Hab. Brazils. Brit. Mus. 



Eriodes frontatus. Thumb of the fore hand none ; reddish brown, 

 beneath yellowish brown ; forehead, elbows, knees and the upper 

 side of the arms and of the four hands black. 



Young like the adult, but with long white hairs on the cheeks and 

 amongst the black hair on the forehead. 



Hab. S. America. Capt. Belcher, R.N., C.B., &c. Brit. Mus. 



