_Nasalis larvatus_, Geoffr., Ann. Mus., xix., p. 90 (1812); Lesson, Spec. des Mamm., p. 66 (1840); Jacq. et Puch., Voy. au Pole Sud, Zool. iii., p. 17, pls. 2, 2A, 2B (1853); Lenz, Zool. Gart., xxxii., p. 216; Gray, Cat. Monkeys Brit. Mus., p. 13 (1870); Hose, Mamm. Borneo, p. 8 (1893). PLATE XXXVII. [Illustration: THE PROBOSCIS MONKEY.] {141} _Cercopithecus nasicus_, Desmar. et Virey, Nouv. Dict. d'Hist. Nat., xv., p. 574 (1817); Wagner in Schreb. Säugeth. Suppl. i., p. 102, pl. x.B (1840). _Semnopithecus nasicus_, Desmoul., Dict. Class. d'Hist. Nat., vii., p. 570 (1825); Schinz, Syn. Mamm., i., p. 43 (1844); Wagner in Schreb. Säugeth. Suppl. v., p. 35 (1855). _Nasalis recurvus_, Vigors et Horsf., Zool. Journ., iv., p. 109 (1828-9; head of young figured); Martin, P. Z. S., 1837, p. 71. _Semnopithecus larvatus_, Fischer, Syn. Mamm., p. 16 (1829); Martin, Mammif. An., p. 453, figs. 279, 280-2 (1841). _Rhynchopithecus larvatus_, Dahlb., Stud. Zool., p. 93, pl. iv. (1856). _Semnopithecus_ (_Nasalis_) _larvatus_, Anderson, Zool. Res. Exped. Yun-nan, p. 42 (1878; with full synonymy). CHARACTERS.--Face cinnamon-brown; ears blackish, as also the palms and soles; upper surface of the head, neck, back and sides yellowish-brown, conspicuously marked with reddish-brown and white; rump, tail and limbs yellowish-grey; tails of old specimens quite white; sides of face yellow, and a stripe of the same colour on the shoulders. Under surface yellowish-white. Hair on the head, which is parted down the centre, on the sides of the face, neck and shoulders, long; the chin full-bearded and the tail tufted; ears small; the nose the most conspicuous feature of the face, produced into a proboscis capable of dilatation, with large nostrils opening downwards, separated from each other by a septum of thin cartilage extending to the extremity. In old males the point of the nose reaches quite below the lowest part of the chin; it is pear-shaped, and furrowed down the middle, giving it the {142}appearance of being double tipped; it is widest in the middle of the free portion. The proboscis is fully developed only at an advanced age in both sexes, being much shorter in the young, and turned upwards. Vigors and Horsfield described their _N. recurvus_ from a specimen which appeared to them to be perfectly adult. The forehead is low; the eyes are wide apart, and the neck is short and much dilated from the presence of a very large laryngeal sac. Length of the body, 29½ inches; of the tail, 26 inches. FEMALE.--Similar to the male, but it is smaller, and wants the greyish rump markings; while the proboscis is somewhat less developed.