174 PYTOSATES 
1825, but in Part II of the same volume of the Journal of the Phila- 
delphia Academy of Natural Sciences, bearing the date 1827, his 
paper on HyLopaTeEs occurs, but it is stated that it was read 
on the 17th October, 1826, as already mentioned. The type came 
from Borneo, and could not be referred to S. syNDAcTyLUs, of which 
Trouessart makes it a synonym, as that species is not found in Borneo, 
and moreover Harlan expressly states his specimen had no gular sac, 
which is a characteristic appendage of the Sumatran Gibbon. Lesson 
(1. c.) gave the name of harlani to H. concotor Harlan and states 
it came from Borneo, and copies mostly Harlan’s account of the animal, 
falling also into his error in considering it an hermaphrodite. Lesson 
makes no mention of Hainan, and it is difficult to see how the name 
harlani could possibly be applied to the species from that island, as is 
done by Trouessart. . 
Dr. Lyon has separated the Gibbon, obtained by Dr. Abbott along 
the Mattan River, from H. concotor as a subspecies under the name 
of H. miilleri albibarbis. I had already examined Dr. Abbott’s speci- 
mens, and, as the almost incredible variation of which the Bornean 
Gibbons are capable is very familiar to me, through the study of 
Mr. Hose’s striking examples as well as of the many specimens 
scattered throughout the Museums of the world, I was unable to 
find any character that was reliable for separating individuals from 
different parts of the island. Dr. Lyon’s characters are solely founded 
on color, which in the Bornean Gibbon especially, is not a character 
but purely an individual variation. Dr. Lyon found no difference 
whatever in the skulls, as was to be expected. I have placed the name 
among the synonyms of H. cONCOLOR. 
HYLOBATES FUNEREUS (I. Geoffroy). 
Hylobates funereus 1. Geoff., Compt. Rend., XX XI, 1850, p. 874; 
Id. Cat. Primates, 1851, p. 7; Id. Archiv. Mus. Hist. Nat., 
Paris, V, 1852, p. 532, pl. XX VI; Gerv., Hist. Nat. Mamm., 
1854, p. 53; Wagn., Schreb., Saugth. Suppl., V, 1855, p. 18; 
Reichenb., Vollstand. Naturg. Affen, 1862, p. 174, fig. 445. 
DARK GIBBON. . 
Type locality. Sulu Island? Type in Paris Museum. 
Geogr. Distr. Islands of Sulu Archipelago? 
Color. Eyebrows whitish; top of head, sides of head, throat, 
under side of body, and inner side of limbs blackish brown; rest of 
pelage, head, body, limbs, hands and feet, grayish white with a brownish 
tinge. Ex type Paris Museum. 
