( 653 ) 



liairs are mucli lengthened, a< are those on the occiput, the latter being directed 

 forwards and upwards in such a way that the black hairs of the forehead and the 

 brown ones of the occiput meet to form a high crest on the crown. 



['■ Iris cinnamon brown. Kvclids, muzzle, and chin white; remainder of bare 

 skin on face livid black. Palms and soles deep blackish brown '" ( ? ). — A. K.] 



Measurements of the type, an adult male in skin : — Head and body, 480 mm. ; 

 tail,* 550; hind-foot, IGO. Skull : greatest length, 90 mm.; greatest breadth, (17. 

 Nasal opening: height, 16-f>; breadth, 10-3. Interorbital breadth, 7-4. Orbit: 

 height, 23 ; breadth. 23. Intertemporal breadth, 45. Breadth of brain-case, 55. 

 Palate: length, 27-5; breadth outside m', 31-6; breadth inside m', 20 mm. 



A new-born specimen is coloured as follows : — ]\Iiddle line of dorsal surface from 

 crown to anus, and whole of tail, deep black, the breadth of the black on the back 

 about an inch and a half ; outer sides of shoulders greyish, and also the backs of the 

 hands and feet commencing to become black, llie whole of the rest of the animal, 

 including the forehead, arms, and legs, wholly pure white. 



This fine species, on whose discovery Mr. Everett is to be congratulated, is repre- 

 sented by a fine series, all of which are absolutely identical with one another, and all 

 come from the same island. 



Although among the many closely allied species of Semnopithecus it is difficult 

 to be at all sm-e of their mutual affinities, it would seem that S. iiatunae is most 

 nearly related to .S'. feinoralis Horsf and <S'. sixmensis 31. & S. Both of these have 

 a similar arrangement of the hairs of the crown and nape ; and, on the one hand, the 

 former possesses the wholly black hands, feet, and tail of 8. natunan, and, to a certain 

 extent, the browner tint of the back, while, on the other, S. siamensis has its whitish 

 underside and light thigh-patch, although united with a widely different general 

 coloration. 



The Bornean representative of S.feinornlis, S. chrysomelas M. & S., ajjproximates 

 to S. natunae in the lighter colour of its chest and sides of neck, while, by having a 

 more or less bicolor tail, it is further off than the typical race. 



In one respect, however, all the three monkeys above mentioned differ from 

 8. natunae — namely, by having two frontal centres of liair-divergence, a character which 

 is particularly well seen in the young. In a baby S. chrysomelas fi-om Sarawak there is 

 a narrow median crest, with a whorl on each side of it, above the eyes ; while, as already 

 noted, there is in S. natunae only one (rather less well-defined) whorl in the median line 

 above the no.se, and the crest only begins at or behind the bregma. In other respects, 

 allowing for a slight difference in age, the two yoimg specimens before us agree 

 very clo.sely in the coloration of their body and limbs ; but the tail of the young 

 S. chrysomekis is sharply bicolor. 



[Native name " Kekah," which is onomatopoeic. These animals were common 

 about the base of Jlount Ranai, going in troops, and they commit great depredations 

 on the native gardens. The irides are light cinnamon brown ; face livid black, the 

 eyelids and muzzle white ; feet and hands very dark brown ; the ears blackish exter- 

 nally, the outer edge and interior dull white, marbled to some extent with livid 

 blackish spots. In an immature individual, barely half-grown, the white of the 

 eyelids, nose, and chin was tinged with dull pink ; and at the exterior angle of each 

 orbit was a bare spot of bluish white showing very distinctly owing to its different 

 tinge of colour, the skin of the face otherwise being liWd black. With maturity these 



• The tails of other examples are from 80 to 90 mm. longer than the above, and it is probable that the 

 t.vpe-8pecimen h.as had his tail injured during life. 



