456 



QUADRUMANA. 



The following figures (280 and 281) are given, in order to shew the 

 difference in the development of the nose, in which the distinction, sup- 

 posed by some writers specific, mainly consists. 



281 



Head of adult Proboscis Monkey. 



Head of young 1 Proboscis Monkey. 



For the details of the anatomy of the Kahau we refer to the Proceedings 

 of the Zool. Soc. 1837, p. 70, et seq. The number of ribs in this species 

 is twelve on each side ; cervical vertebrae, seven ; dorsal, twelve ; lumbar, 

 seven; sacral, three"; caudal, twenty-three : the bones of the arms and legs 

 are slender (in the specimen dissected) ; the humerus measured six inches 

 and a half; the radius six inches and a half; the femur, from the top of 

 the trochanter to the condyles of the knee, seven inches and a quarter ; 

 the tibia, six inches and a half. 



M. GeofFroy remarks that the cerebral capacity, and the development 

 of the forehead, beyond what obtains in other] Semnopithici, betoken a 

 superior degree of intelligence. Neither the cerebral capacity, nor the 

 development of the forehead, are comparatively greater in the specimen 

 existing in the museum of the Zoological Society of London, than in others 

 of the same genus (see fig. 282). 



GENERAL HISTORY. It would appear that Wurmb, to whom we 

 owe our knowledge of the habits of the Kahau, and who described it in the 

 282 Memoirs of the Society of Batama, from 



specimens which he shot in Borneo, is not 

 the first describer ; for the great anatomist, 

 Daubenton, had previously read a memoir 

 respecting it, before the Academy of Sciences 

 at Paris; but this paper was never pub- 

 lished : there is no allusion to it in the Sup- 

 plement to Buffon's Nat. Hist, vii., where 

 the animal is figured and described under 

 the title of " Guenon a longue nez ;" and 

 whether the memoir on the " Nasique," by 

 Daubenton, be still in existence, and, if so, what may be the details and 

 statements it contains, we have no means of ascertaining. It is, however, 



Skull of Proboscis Monkey. 



