455 



already referred to, excepting that its colours are brighter ; it was sent 

 from Borneo, by M. Diard, in 1802, and is also a young female, 

 measuring eighteen inches in the length of the head and body ; the tail 

 being seventeen inches. That the adult female has the nose of the same 

 form, and relative proportions, as the adult male, has been verified by an 

 examination of the specimen dissected, in which this organ was elongated 

 and recumbent. Nevertheless, reasoning from what is known of the 

 changes which take place, not only in the skull, but in the fleshy parts of 

 the face in the Simiadae 9 generally (as for example the acquisition of callous 

 protuberances on the cheeks of the adult male Orang, and the develop- 

 ment of ribs and deep furrows on the sides of the muzzle in the adult 

 Mandrill), we are justified in regarding the comparative shortness and 

 upturned contour of the nose in these specimens, as the indications of 

 immaturity, and in concluding that, in process of time, the organ in 

 question undergoes that not very great degree of modification requisite to 

 its agreement, in all respects, with what we see in the specimens of 

 acknowledged adults. Perhaps, indeed, it is rather in the immature 

 female, than in the immature male that the difference is most marked ; 

 in very young individuals, however, of both sexes, its development is 

 said to be but little more than in ordinary Semnopitheci. As to the absence, 

 in the Kahau, of a beard, which, in the Nasalis recurvus, is very distinct, 

 a circumstance on which Messrs. Vigors and Horsefield lay some stress, 

 the fact is, that, in the Kahau, a beard not only exists, but it is long, and curls 

 upward ; and the mistake on this point arose from their having taken the 

 specimen in the museum of the Zoological Society as their standard of 

 comparison, which specimen is, in this respect, imperfect, and otherwise 

 not in first-rate condition. 



In the specimen at Paris, referred to, and in that in the museum of 

 the Zoological Society, the naked skin of the face is of a pale orange, or 

 yellowish colour ; whilst, in the adult male Kahau, as well as in the adult 

 female, it is of a dark or leaden blue, not, however, without partial clouds 

 of brown, and traces of orange. The leaden, or blackish tint, most probably, 

 does not spread over the face until the age of maturity. 



The following is a description of the specimen in the Paris Museum: 

 face nearly naked, and of an orange colour ; beard distinct ; top of the 

 head, occiput, and shoulders, of a deep rich chestnut ; the hairs of the head 

 radiating from a centre ; the general colour very bright foxy red, deepening 

 to chestnut along the sides of the face, down the back of the humerus 

 and the outside of the thighs, and fading, on the abdomen, into yellow ; 

 the fore-arms, inside of the limbs, the ankles, hands, and feet, of a dirty 

 straw white; the rump and tail of a pale ashy brown. Length of head and 

 body, eighteen inches ; of the tail, seventeen. Note on the stand " De 

 1'envoi fait par M. Diard, 1802." 



