] 82 



Characters. — A macaque of medium size differing- from the main- 

 land animal and from Macaca Icetus (Elliot)* of Tinggi and Tioman 

 Islands, in the less annulated ochraeeous upper surface which is greatly 

 reduced in area, darker under h.\v, and also in the more silvery limbs 

 and imder-parts, and paler tail. 



Colour. — Upper- parts mingled ochraeeous and l)rownish hlaclc, the 

 annulations indistinct and the dark element appearing rather as a wash 

 or cloiiding than a speckle : Lase of fur, dark greyish hrowni. Colottr 

 of upper-parts confined to head and ])ack and not extending to the 

 sides. Outer surfaces of fore-limbs and upper-parts of thighs, frosted 

 grey suffused with pale buff. 



Entire under-parts with sides of body, entire lower-parts of thighs, 

 inner sides of fore-lim])s and sides oi head, ])elow and behind ears, pale 

 whitish silvery. 



Muzzle and sides of face clad with short greyish hairs ; lateral 

 facial fringes faintly sullied with buff ; a fringe of black hairs above 

 the forehead. 



Hind-feet concolorous with legs, fore-feet like fore-limbs but 

 lacking the faint buffy wash. 



Outer surface of proximal half of tail greyish black, wdiole remain- 

 ing portion silvery white like the abdomen. 



Skull and Teeth. — Comparison of the skulls of macaques are of 

 little value as the minor characters are not fixed and alter entirely with 

 age. However, the supra-orbital ridges in the type are very high and 

 projecting so that viewed laterally the nasals present a notably concave 

 outline, very different from M. hvtvs, whei-e the outline is nearly 

 straight ; the muzzle is broad, the canines very heavy and the pa.late 

 strongly arched, yet, owing to the horse-shoe shaped arrangement of the 

 maxillary teeth, the breadth of the muzzle is least across the canines. 



Measurements. — Collector's external measurements of type : total 

 length, 1,068 ; head to symphysis pubis, 490 ; tail vertebrae, 620 ; hind- 

 foot, 135. Cranial measurements : greatest length, 113.3 ; posterior 

 occipital extremity to nasal spine, 94.4 ; posterior occipital extremity 

 to glabella, 78 ; gnathion to median upper edge of supra-orbital ridge, 

 62.4 ; gnathion to orbit, 41 ; orbit to posterior occipital extremity, 79.7 ; 

 zygomatic breadth, 83 ; external biorbital breadth, QQ : post-or]>ital 

 constriction, 79 ; basal length, 81.5 ; palatal length, 41 ; palatal 

 breadth at canine, 16.5 ; palatal breadth at »;\ 22.5 ; palatal breadth 

 at m", 20 ; greatest breadth of rostrum below roots of zygomata, 40 ; 

 maxillary tooth-row, excluding incisors, 37 ; mandibular tooth-row, 

 excluding incisors, 44 ; greatest length of mandible, 82 ; height of 

 mandible at condyle, 34. 



Specimens Examined.- -Two from Pulo Pinang and two others 

 from Great Eedang Island, 200 yards distant. 



Eemarks. — This macaque is characterised by moderate size, by the 

 reduced extent of the o chraeeous area and by the silvery limbs and 



* " Annals and Mnoaziiie of Natural History," Ser. 8, vol. iv., Sept., 1909, p. 255. 



