On the Gibbon of the Island of Hanan. 145 
var. Karelinii, it is clear that the form Jlongtpes cannot be 
upheld even as a subspecies. ‘The measurements are here 
given of the specimen referable to 7. longipes (a) and of a 
normal M. cristata, var. Karelini? (b), both males from Naples. 
a. b. 
millim. millim. 
Motaltlengthe ye s...ja0 5 sees 108 108 
From snout to cloaca ...... 60 56 
leleeyal (GiatlINY sh aocdadcudsooc 14 14 
Wadithvotshead! vrs onesies 11 1] 
Rone lb. sooodcnbuosaeeor 25 22, 
hind thine eras. hk es 8 6 
Jabrxsl bil) ceonaocadouepe.on 28 22 
MBhindstoege peo etunn a Mii eon 10 ff 
rR ee Rees tu tatative tec cron 48 52 
It must be borne in mind that the typical form also varies 
considerably as regards the elongation of the digits, and that 
Strauch’s statement as to the proportions of the limbs in J/, 
cristata applies only to females, which have the digits much 
shorter than in the males. It is quite clear, from the 
measurements given on p. 46 of his memoir, that the speci- 
men from the Gov. Kursk, with which he compares the (male) 
type specimen of 7. longipes, is a female; it need hardly be 
added that such a course, in a group of animals in which the 
secondary sexual characters are so highly developed, can only 
convey a fallacious impression, especially if no mention is 
made of the sexes of the specimens the measurements of 
which are tabulated. 
XXILI.—Note on the Gibbon of the Island of Hainan 
(Hylobates hainanus, sp. n.). By OLprieLp THoMas. 
In his paper on the mammals of Hainan * Mr. Robert 
Swinhoe has given an account, mainly compiled from native 
authorities, of the Gibbon which inhabits that island; but no 
specimen appears hitherto to have been brought to Europe. 
The animal was referred by Mr. Swinhoe, with some doubt, 
to Hylobates pileatus, Gray, the Cambodgian species; but as 
he was unable to obtain a specimen, this reference has never 
been confirmed. 
At length a specimen of this Gibbon has been presented to 
the British Museum by Mr. W. T. Lay, to whom it was 
* Proc. Zool. Soc. 1870, p. 224. 
Ann. & Mag. N. Hist. Ser. 6. Vol. ix. 10 
