MAMMALIA — QUADRUMANA. 
19 
Is. Geoffrey has again distinguished two species of our orang-outangs ; 
the Pithecus satyrus of Borneo and Sumatra, and another of Sumatra, 
which he calls P. hicolor, because the fur above, and in the middle of the 
belly, is red ; while behind the belly, on the sides, shoulders, inside the 
thighs, and around the mouth, it is fulvous white. The sockets of the 
eyes, in the former, are longish and oval ; in the latter, four-cornered, 
and scarcely longer than broad. The latter is the one which lately was 
alive in the Menagerie (Compt. Rend. xv. p. 720). As the colour 
and form of the sockets are variable, this new species appears very 
problematical. 
Sur les Singes de I’Ancien Monde, specialement snr les 
Genres Gibbon et Semnopitheque par M. Is. Geoffroy. (Compt. 
Rend. xv. p. 746). 
Is. Geoffroy wiU contribute a copious work upon these genera, in 
Jacquemont’s “ Voyage aux Indes and meanwhile, he gives an extract 
from it : — He enumerates ten species of Gibbons, — 1. Hylobates leuciscus: 
2. H. agilis : 3. H. Rajiesii : 4. H. alhimanus : 5. H. leucogenys ; 
habitat unknown : 6. H. Hooloch : 7. H. choromandus, not yet exactly 
identified : 8. H. concolor, Hark, a species to which, as Is. Geoffroy 
says, Dutch zoologists have incorrectly attached the fulvous and brown 
Gibbons from Borneo; he does not, however, mention to what these 
properly belong : 9. H. syndactylus : 10. H. entelloides, a new species 
of Is. Geoffroy, with this character ; fur very light fulvous colour ; orbit 
of the face white ; face and hands black ; cheek callosities small and 
round ; second and third toes united by a piece of skin, almost to the 
joining of the first with the second joint : from the Peninsula of Malacca. 
Blyth remarks in a letter (Ann. of Nat. Hist. ix. p. 61), that Lieut. 
Beagin, from a sketch of Hylobates leucogenys, recognised an animal 
which he had often met in the Malabar ghauts, where it lived in the 
jungles, generally in groups of eight or ten. 
Of the genus Semnopithecus, Is. Geoffroy enumerates fifteen species, 
besides one Nasalis. He describes a new species, Semnopithecus dus- 
sumieri : — body greyish-brown ; head, throat, sides, and under part of 
body, fulvous ; tail and legs brown, which, on a great portion of the tail, 
on the fore-arms, and the hands and feet, passes into red-brown (roux) ; 
hair upon the head divergent ; from the Malabar coast. 
In the Ann. of Nat. Hist. x. p. 256, Gray adds a species also to the 
slender apes, viz., Presbytis nobilis : bright rufous, without any streak 
on the shoulders. Habitat, India. British Museum. This species differs 
from the Simia melalophos in being darker, and not having a black 
crest; from P. Jiavimanus in being of a nearly uniform auburn, and 
not yellow, with a blackish back, and in having no black streak across 
the shoulder or on the cheek. 
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