Till recently these apes have been generally included in the same family (Simiidae) with the chimpanzee, gorilla and orang-utan, but they are now regarded by several naturalists as representing a family by themselves - the Hylobatidae.
In his classification it was included in the same genus as the orang-utan; and it has recently been suggested that the name Simia pertains of right to the chimpanzee rather than to the orang-utan.
ORANG-UTAN (" man of the woods"), the Malay name of the giant red man-like ape of Borneo and Sumatra, known to the Dyaks as the mias, and to most naturalists as Simia satyrus.
The red, or brownish-red, colour of the long and coarse hair at once distinguishes the orang-utan from the African apes; a further point of distinction being the excessive length of the arms, which are of such proportions that the animal when in the upright posture (which it seldom voluntarily assumes) can rest on its bent knuckles.
Among the quadrupeds the most remarkable is the orang-utan (Malay, orang Man, i.e.