30 SIMIID^. 



Mus. 1851, pp. 13, 14 ; Jacquemont et Pucheran, Voy. au Pole Sud. Zool. vol. iii. 1853, p. 22, 

 Pis. 3 and 4; Dahlbom, Stud. Zool. Fam. Reg. An. 1856, pp. 88, 89; Gray, Cat. Monkeys 

 and Lemurs, B. M. 1870, p. 15. 



The specimen of S. cristatus in tlie Indian Museum, London, presented by 

 Sir Stamford Eaffles as an example of tliis species, and which may therefore be 

 regarded as the type, is a brownish-black monkey tinged with fuliginous on the 

 flanks, fore-arm, and crest, but not more so than examples of S. maurus are occa- 

 sionally with grey. Raffles describes the species as dark grey, the hairs being in 

 general black, with white tips. The face, fore-arms, hands and feet are black, and 

 the upper surface of the tail nearly black, the under parts of the body paler, the 

 hair of the head diverging round the face and forming on the top a kind of 

 crest. Miiller and Schlegel describe the face, ears, and under surface of hands coal 

 black, as in S. mcmrus, which supports Raffles' statement as to the colour of the 

 face and which has been questioned by some naturalists. Ptaffles also describes a 

 variety of this animal as light grey or whitish. 



In the size and proportions of its parts the species closely resembles >S'. 

 mauriis, and many zoologists have considered it merely as a local race of that 

 form, an opinion justifiable from the mere consideration of their external characters, 

 but it remains to be ascertained whether these views are supported by the 

 structure of their skeletons. There can be no doubt that S. cristatus is much 

 more variable than S. mcmrus, but at the same time monkeys from Sumatra are 

 found quite as black as S. maurus, and with the essential features of that species. 

 Muller and Schlegel were of the opinion that S. cristatus was only recognisable 

 from the latter by its grey fur, and they extend its distribution to Borneo as 

 well as Sumatra. The monkeys of this group from these islands are characterised 

 by their black faces, black or blackish-brown fur, nearly similarly crested heads 

 and like proportions of body. Much, however, has yet to be learned regarding 

 them and the changes they undergo from youth to age in both sexes. 



Ft. In. 



Length of the body to the vent . . . . . . . .20 



„ of tail ........... 2 6 



The young are reddish fawn, but the hands and feet gradually change throuo-h 

 greyish brown to the colour of the adult, the crest also with increasing age becom- 

 ing directed forwards. 



I have not had an opportunity to examine the skull of this species, which 

 has large orbits.^ 



Habitat. — Sumatra and Borneo. 



Semnopithecus femoralis, Horsfield. 



Simla maura. Raffles, Trans. Lin. Soc. vol. xiii. 1822, p. 247. 



Semnopithecus femoralis, Horsfield, Appendix, Life, Sir T. S. Raffles, 1830, p. 643; Waterhouse 

 Cat. Zool. Soc. Mus. Lond. 1838, 2nd ed. p. 5 ; Martin, Charlesworth's Mag. Nat. Hist, new 



1 Martin, I. c, p. 476. 



