254 Dr. D. G. Elliot 07i apparentli/ neio 



"witli cream-biiff tips ; upper side of thighs like back; rest 

 of legs yellowish grey ; feet olive-brown ; under parts of 

 body and inner side of limbs yellowish white ; tail above 

 black, speckled with white for three-fourths the length, and 

 then grading into liair-brown, tuft at tip bistre, beneath 

 pale reddish brown ; eyelids anrl patch over eyes Hesh-colour. 

 Aleasurements. Total length 794< mm. ; tail 361; foot 125 ; 

 ear 33 (coliectoi-). Skull: total length 1106; occipito- 

 nasal length 927 ; hensel 72*7; intertemporal width 41-1; 

 zygomatic width 72 8 ; greatest width of brain-case 58 ; 

 palatal length 73"5 ; length of nasals 248 ; length of upper 

 molar scries 261 ; length of mandible 79; length of lower 

 molar series 33. 



Type in British jNIuseum, no. 9. 4. 1. 36. 

 This Macaque exhibits an entirely differently coloured 

 pelage from the Singapore species, and one much nearer to 

 the Kuruman and Sumatran forms, while the skull in its 

 characters is closer to the Singapore animal. In colour it is 

 reddish brown, duller in hue than the Macaques from either 

 of the islands above named. The affinities of these monkeys 

 from the various islands of this archipelago are rather diffi- 

 cult to understand, and why their colouring should be similar 

 in Kundur and the islands to the south as far as Sumatra, 

 and the cranial characters should so nearly agree with the 

 Singapore species, separated as it is by intervening islands 

 inliabited by an allied but different form, is difficult to 

 explain. It would be practically useless to theorise upon 

 this condition of things, although in ornithology a similar 

 state of affairs exists among some genera of birds in the 

 Eastern ArchipelagOj such as Pitta ; but in the case of the 

 Macaques these animals are probably in process of change 

 influenced by their insular habitats, though these islands are 

 but short distances apart, and it is rather difficult to appre- 

 ciate how great these influences may be. At present we 

 only know that material differences do exist, and of such 

 importance as to compel us to regard the individuals from 

 the various islands as jDossessing characters so unreconcilable 

 with each other as to prevent us from believing them all to 

 belong to one and the same species. 



Pithecus karimoni, sp. n. 



Type locality. Monos, eastern coast of the island of 

 Karimon. 



Gen. char. Similar in colour to P. fascicularis of Sumatra, 

 and its skull nearer to that species than it is to those of 



