MACACUS. 21 



inches long and 4'25 broad. It is just possible that two dis- 

 tinguishable forms, a larger and a smaller, are indicated by these 

 measurements. 



Distribution. The pig- tailed Monkey is found throughout a 

 great part of Tenasserim, although apparently not common, except 

 in the extreme south of the province a circumstance that probably 

 explains why the occurrence of M. nemestrinus in Southern Burma 

 has been generally overlooked. There is, however, a skeleton in 

 the British Museum (the old female of which the skull-measure- 

 ments are given above) sent by Major Bingham from Meplay 

 valley, Thoungyeen river, and a skull presented by Dr. Oldham 

 from Mergui. Tickell, too, in his MS. notes, records and describes 

 specimens from Ye ; and Mr. "W. Davison tells me that the species 

 is common about Malewun and Bankasun. The pig-tailed Monkey 

 is not found north of Tenasserim, but extends south into the Malay 

 Peninsula, Sumatra, and Borneo. 



Habits. The pig- tailed Monkey in Tenasserim, according to 

 Tickell, frequents thick jungle about the base of the hills. The 

 voice and manners are similar to those of M. rJiesus. When the 

 animal is excited the tail is held in the form of an S. In Sumatra 

 M. nemestrinus is said by Sir S. Eaffles to be peculiarly docile, and 

 to be trained to climb the cocoa-nut trees and gather nuts for 

 its master. This can only apply to females and young animals ; 

 old males are very savage, and they are formidable animals from 

 their size and strength. 



The period of gestation in this species has been ascertained to 

 be 7 months and 20 days. 



9. Macacos cynomolgus. Macaque, or crab-eating Monkey. 

 Simla cynomolgus, Schreb. Saugth. i, p. 91, pi. xiii (fig. Buffori), nee 



Macacus irus, F. Cuv. Mem. Mus. iv, p. 120 (1818). 



Macacus carbonarius, F. Cuv. Hist. Nat. Mam. pi. xxxii (1825) ; 



Blyth, Cat. p. 9. 



Macacus aureus, Is. Geoffr. Voy. Bel., Zool. p. 58. 

 Macacus cynomolgus, Blyth, Cat. p. 9 ; id. Mam. Birds Burma, p. 7 ; 



Anderson, An. Zool. Res. p. 73 ; id. Cat. p. 61. 



Myouk-ta-nga, Burmese ; Ta-o-tan, Tavoy and Arakan ; Kamui-awiit, 

 Talain ; Da-ouk, Sha-ok-li, Karen ; Krd, Malay. 



Fur of moderate length and nearly straight. Hair of the crown 

 not lengthened, and usually directed backwards, but occasionally 

 radiating somewhat irregularly from one or more centres, or form- 

 ing a rudimentary crest. Tail nearly as long as the head and 

 body. Caudal vertebrae 22. 



Skull long and low, with the muzzle produced, and the orbits 

 much broader than high. 



Colour. The general tint of the upper surface varies from dusky 

 or greyish brown to rufous or golden brown in different individuals ; 

 lower parts light greyish brown to nearly white. The hair of the 



