No. 3 Hylobates Syndactylus. — The Siamang
Habitat.—Tenasserim Province, Sumatra, Malayan Peninsula.
Description.—A more robust and thick-set animal than the two last; deep, woolly, black fur; no white supercilium nor white round the face. The skull is distinguished from the skull of the other Gibbons, according to Dr. Anderson, by the greater forward projection of the supraorbital ridges, and by its much deeper face, and the occipital region more abruptly truncated than in the other species. The index and middle toes of the foot are united to the last phalange.
Size.—About three feet.
This Gibbon is included in the Indian group on the authority of Helfer, who stated it to be found in the southern parts of the Tenasserim province. Blyth mentions another distinguishing characteristic—it is not only larger than the other Gibbons, but it possesses an inflatable laryngeal sac. Its arms are immense—five feet across in an adult of three feet high.
The other species of this genus inhabiting adjacent and other countries are H. Pileatus and H. leucogenys in Siam; H. leuciscus, Java; H. Mulleri and H. concolor, Borneo.
← Back to Natural History of the Mammalia of India and Ceylon