HYLOBATES. 11 



{Donbfful species.) 



Hylobates fuscus, Winslow Lewis. 



Hi/ loiaies fttsctis, 'Winshw Lewis, Boston Journal, Nat. Hist. vol. i. Pt. i. May 1834, p. 32; 

 pis. i. and ii. (skeleton and skull). 



General colour, dirty brown. Face and hands black. 



Such is the brief description of this animal, a male and female of which were 

 purchased in Calcutta from the menagerie of a Rajah, who stated that he had 

 obtained them from the vicinity of the Himalaya. 



The animal from which the above description was taken was an adult female 

 with mature dentition. 



The upper canines were enormously projecting, extending nearly to the mental 

 foramina when the jaws were closed ; the inferior canines projecting upwards as 

 f^r as the alveolar processes of the upper jaw. 



The vertebral formula was C. 7 : D. 13 : L. 5 : S. 3 : C. 1 : = 29. 



The sternum had three pieces and there were six false ribs. 



Prom the locality assigned to this species, we would have looked for the 

 characters of H. hoolock, but among the very many examples of the latter species 

 which have passed under my notice, I have never met with any in which the 

 characteristic white supercilium was absent. 



On the other hand, the description of JI. fuscus suggests that it may be a 

 brownish example of the wholly black Gibbon from Borneo, which was described by 

 Dr. Harlan as H. concolor, but from a hermaphrodite individual, and which 

 appears to have been a very different animal from the S. concolor, MUUer, which 

 was afterwards named S. millleri by Martin. 



I attach no importance whatever to the locality assigned to this Gibbon, 

 because my experience of Eajahs' menageries in Calcutta has taught me that the 

 owners have no means of ascertaining with any degree of accuracy the localities 

 from whence their specimens are obtained. 



Hylobates concolor, Harlan. 



Sitnia concolor, Harlan, Journ. Acad. Nat. Sc. Philad. 1827, vol. v. pi. ii. p. 229. 



Hylobates concolor, Schlegel, Essai sur la Physion. des Serpens, Pt. Genl. 1837, p. 237 ; Wag'ner, 



Schreber, Saugeth. Suppl. vol. i. 1840, p. 79 ; vol. v. 1855, p. 17 (in part) ; Blyth. Journ. As. Soc. 



Bengal, vol. X. 1841, p. 838; Fry, Proc. Zool. Soc. 1846, p. 15; Ann. and Mag, Nat. Hist. 



vol. xvii. 1846, p. 487. 

 Hylobates harlani, Lesson, Bull, des Sc. Nat. (Terrusac) vol. xiii. 1827, p. 111. 



This Gibbon was a hermaphrodite from the Island of Borneo, described as 

 having the fur full, crisp, and universally black. Considering tlie abnormal con- 

 struction of this animal, it must be left to future research to determine whether or 

 not such a species exists in Borneo distinct from S. mulleri, Martin. 



