98 



that the latter are united to the contiguous middle or ring fingers, 

 respectively, through the greater part of the first plialanx, as in the 

 Siamang, Pithecus syndactylus, F. Cuv. The face is short, the head 

 round, and the -vvhole form and habit of the animal similar to those 

 of the Semnopitheci. The teeth are of the usual form and number, 

 and there are large and very distinct cheek pouches. I was the more 

 particular in making this lašt observation, because the organs in 

 question had not been previously recorded as existing in the Colohi, 

 and because M. GeofFroy St. Hilaire in his valuable lectures, of which 

 it is a matter of great regret that so small a portion has been given 

 to the public, even doubts their existence. Of this, however, there 

 can be no longer any reasonable doubt ; they are extremely appa- 

 rent and rather capacious in the specimen now under description. 

 The teeth of this specimen, a very old female, without even except- 

 ing the canines, vphich do not appear to have been remarkably large 

 at any time, are \vom ahnost down to the gums. Mr. Rendall pos- 

 sesses a second and younger specimen which, however, differs in no 

 respect from that just described. 



The arrival of these skins, probably the only perfect specimens of 

 the genus Colobus in Europe, ■with the exception of that in the Ley- 

 den Museum, and of the specimens recently brought from Abyssinia 

 by Dr. Rūppell, naturally led me to refer to the imperfect skins no- 

 ticed by Mr. Bennett in the ' Proceedings of the Committee of Science 

 and Conespondence' of this Society for 1832, page 122, and to exa- 

 mine generally the characters of the difFerent species already described. 

 The result of my investigation into this subject leads me to conclude 

 that we at present possess sufficient indications of six distinct spe- 

 cies of Colohi, \vhich may be characterized as follovi^s : 



1. Col. polycomos, Schreb., " \vith the head and shoulders co- 

 vered with long, coarse, flowing hair, of a dirty yellowish colour, 

 mixed ■vvith black ; body, arms and legs of a fine glossy blackness, 

 covered with short hair ; taU of a snowy whiteness, ■vvith very long 

 hair at the end forming a tuft." 



2. Col. Ursinus, \vith very long glossy black hair over the whole 

 body and extremities, and a long snowy \vhite tail slightly tufted at 

 the end : described from two imperfect skins, vvithout head or hands, 

 the šame asthosenoticedby Mr. Bennett in the 'Proceedings' for 1832. 

 Mr. Bennett considered these skins as referrible to the Col. poly- 

 comos; and the general colour of the body and tail, as well as a slight 

 appearance of grizzled or gray hair about the neck, where the head 

 has been cut off, in both the specimens, Tvould at first sight appear 

 to justify his views ; but the words of Pennant, (the only original 

 describer of the species,) as quoted above, imply that the " long 

 dirty yellowish hair," which he compares to a fuU-bottomed perri- 

 ivig, grows from the shotdders and neck as well as the head, and 

 expressly declare that the hair on the ręst of the body, as well as on 

 the legs, is short. Now in the specimens at present under consider- 

 ation the very reverse of this is observable. The black hair of the 



