HYLOBATES 175 
The type is exactly like specimens of H. concoLor except that the 
white band on the forehead is narrower; otherwise there is no differ- 
ence to be seen. Until more specimens from the Sulu group of isiands 
are obtained, it is perhaps best to leave it as a race of H. coNcOLor. 
HyY.Losates Fuscus Winslow-Lewis. 
Hylobates fuscus Lewis, Journ. Nat. Hist. Soc. Boston, I,. Pt. I, 
1837, p. 32, pls. I, II; Anders., Zool. Res. Exped. Yunnan, 
1878, p. 11. 
LEWIS’S GIBBON. 
Type locality. “Vicinity of the Himalay Mountains.” 
Geogr. Distr. Unknown. . 
Genl. Char. “Upper canines reaching nearly to the mental 
foramina, the lower canines projecting upwards as far as the alveolar 
process of the lower jaw.” 
Color. “Dirty brown; face and hands black.” 
The habitat of this Gibbon is extremely uncertain. A male and 
female were purchased in Calcutta from the menagerie of a Rajah, 
who stated that he had obtained them from the “vicinity of the 
Himalay Mountains,” a locality that might mean anywhere. The very 
brief description given is that contained in quotation marks. Anderson 
describes the canines as stated above, but does not say where he saw 
the cranium, and I have no information as to the present location 
of the specimens. It is extremely doubtful if the examples have any 
claim to a distinct rank. 
