228 A NEW BORNEAN HERPESTES. 



We see that notwithstanding b is younger than the 

 very adult c — molars very used ! — they both agree in 

 general shape and size, sothat it is evident that they be- 

 long to the same species, but how differently shaped is a 

 and especially its posterior part ; its dentition is much more 

 used than that of 6, the jaw of a however on the whole 

 is much smaller; the coronoid process of b and c is very 

 broad and more broadly rounded off, that of a is less 

 stout and more pyramidically shaped, with vertical sides; 

 consequently is the shape of the arch from the coronoid 

 process to the condyle a quite different one; the arch lying 

 between the condyle and the angle is less deep and much 

 wider in a than in b and c. I may mention here that the 

 lower jaw of H. brachyurus twice has been figured, namely 

 in the » Zoology of the voyage of H. M. S. Samarang" and 

 in »de Blainville's osteographie", and that both figures 

 agree quite well with our figures b and c. 



Externally H. Hosei presents some very striking charac- 

 teristics ; the general colour is more brownish red than in 

 brachyurus originating from Hosei having shorter hairs, so 

 that meanwhile both species show the same subapical ring 

 to each hair, the black colored part of each hair is much 

 longer in brachyurus and for that reason the animal makes 

 a much darker impression. Another important character is 

 that meanwhile brachyurus has the claws curved, in Hosei 

 the claws are more strait and slender, nay somewhat larger. 



This specimen, the type of Herpestes Hosei, has been 

 collected by Mr. Charles Hose on the Baram-river and he 

 kindly presented it in 1893 to our Museum. 



Notes from the Leyden M^useum, Vol. XXIII. 



