180 DR. J. E. GRAY ON A. NEW COLOBUS. [Feb. 27, 



antice producta, angusta, rotundata, postice lata, angulata, 

 oblique truncata ; margine ventrali concavo, anteriore hiante, 

 margine dorsali arcuato ; superficie valvarum irregulariter con- 

 centrice striata, epidermide olivacea induta, ad umbones erosa ; 

 umbonibus parvis, anterioribus ad \ longitudinis testce positis ; 

 intus margarita luteo-alba, versus marginem ventralem cceru- 

 lescente. 

 Long. 135, alt. sub umbones 1.5, ad partem posteriorem 28, lat. 

 14 mill. 

 Hab. Forest-streams, near Chyavetas, Upper Amazons. 

 This exceedingly beautiful species was discovered by Mr. E. Bart- 

 lett. 



DESCEIPTION OF PLATE XIV. 



Fig. 1. iM'ponia casfanea, p. 178. 



2. Otosfomus rubrovariegatus, p. 178. 



3. lamas, p. 179. 



4. A'csta de-crespignii, p. 179. 



5. Aglaia farrisi, p. 179. 



6. Mgcetopus falcaius, p. 179. 



6. Notices of a New Species of Colobus and of another Monkey 

 from Zanzibar. By Dr. J. E. Gray, F.R.S., V.P.Z.S. 



(Plate XV.) 



Dr. Kirk has kindly sent to the British Museum a series of ani- 

 mals in spirits, from Zanzibar — amongst them some species wliich, 

 I believe, have not before been described, and some other specimens 

 which will enable known species to be better understood. I will, on 

 a future occasion, as soon as I have been able to examine them 

 more carefully, send an account of these specimens to the Society. 

 My object now is to lay before the Society a notice of a new species 

 of Colobus, which I propose to call 



CoLOBUS KIRKII, Sp. UOV. (PI. XV.) 



Head with long divergent hairs, forming a kind of cap, bent back 

 over the forehead. The crown of the head, back, and tail red brown, 

 end of tail rather paler ; the nape, upper surface of hands and feet, 

 and outside of the upper and forearm and of the thighs blackish ; 

 the forehead, cheeks, throat, side of the neck, chest, underside of 

 the body, inner side of the limbs and the hind legs, and the hinder 

 edge of the arms and thighs greyish white ; a few bristly hairs on the 

 eyebrows black. 



Hab, Zanzibar (Dr. Kirk). 



The British Museum contains specimens of all the known species 

 o{ Colobus, except Colobus verus of Van Beneden. This new species 

 is quite distinct from them, and cannot be confounded with the above 

 species described and figured by Van Beneden. 



It is most like Colobus ferrugineus, but is quite distinct from all the 



