QUADRUMANA. 629 



the Galeopithed inhabit the Indian Archipelago, but the best 

 known is the Galcopithecus volans of Java, Sumatra, and 

 Borneo. The most characteristic point in this singular animal 

 is the presence of a flying membrane, presenting some super- 

 ficial resemblance to the patagium of the Bats, but in reality 

 very much the same as the integumentary expansions of the 

 Flying Squirrels and Flying Phalangers. This membrane in 

 the Galeopithccus extends as a broad expansion from the nape 

 of the neck to the arms, from the arms to the hind-legs, and 

 from the hind-legs to the tail, forming an inter-femoral mem- 

 brane. The fingers are not elongated, and do not support a 

 patagium, as in the Bats, so that the animals have no power of 

 true flight, and can simply take extended leaps from tree to 

 tree. The feet are furnished with five toes each, united by a 

 membrane, but neither the hallux nor the pollex are opposable 

 to the other digits. The dentition is complicated, and con- 

 sists of incisors and molars, and, according to Owen, canines 

 also, the dental formula being 



. 2 2 I 1 22 33 



i ; c ; pm - ; m = 34. 



3 3 > i i' 2 2' 33 



The six lower incisors are split into narrow strips, like the teeth 

 of a comb. The Galeopithed live chiefly upon small birds and 

 insects, but also partially upon fruits. They are nocturnal 

 animals, arboreal in their habits, and they sleep head down- 

 wards, suspended by their prehensile tails. 



CHAPTER LXXXI-II. 



QUADRUMANA. 



ORDER XIII. QUADRUMANA. The thirteenth order of Mam- 

 mals is that of the Quadrumana, comprising the Apes, Mon- 

 keys, Baboons, Lemurs, &c., characterised by the following 

 points : 



The hallux (innermost toe of the hind-limb) is separated 

 from the other toes, and is opposable to them, so that the 

 hind-feet become prehensile hands. The pollex (innermost 

 toe of the fore-limbs) may be wanting, but when present, it 



