SYMPHALANGUS 177 
SYMPHALANGUS SYNDACTYLUS (Desmarest). 
Pithecus syndactylus Desm., Mamm., 1820, p. 531; Less., Man. 
Mamm., 1849, p. 30. 
Hylobates syndactylus F. Cuv., Hist. Nat. Mamm., var., 1821, pl. 
IV ; Jd. Dict. Scien. Nat., XXXVI, 1825, p. 287; Griff., Anim. 
Kingd., V, 1827, p. 6; E. Geoff., Cours Hist. Nat. Mamm., 
1828, p. 34, 7me Lecon; F. Cuv., Régn. Anim., I, 1829, p. 90; 
I. Geoff., Bélang., Voy., Zool., 1834, p. 30; Bennett, Wander. 
N. S. Wales, II, 1834, p. 151; Miull., Tijdsch. Natuur. Gesch. 
Phys., II, 1835, p. 324; Schleg., Essai Phys. Serp., Pt. Gén., 
1837, p. 236; Waterh., Cat. Mamm. Mus. Zool. Soc. Lond., 
1838, p. 4; Wagn., Schreb., Saugth. Suppl., I, 1840, p. 69; 
V, 1855, p. 15; Less., Spec. Mamm., 1840, p. 30; Sandif., 
Verhand. Natur. Geschied. Nederl., 1840; I. Geoff., Archiv. 
Mus. Hist. Nat., Paris, II, 1841, p. 535; Id. Compt. Rend., 
XV, 1842, p. 717; Martin, Mammif. Anim., 1840, p. 420, pl.; 
Mill. und Schleg., Verhandl., 1839-44, pp. 15, 31, 33, pl. II, 
figs. 3-5, pl. VII, figs. 1-3; Blyth, Journ. Asiat. Soc. Beng., 
XIII, 1844, pp. 463, 474; XLIV, 1875, ext. no. p. 3; Schinz, 
Syn. Mamm., I, 1844, p. 28; Gerv., Hist. Nat. Mamm., I, 
1854, p. 51, fig.; Dahlb., Stud. Zool. Fam. Reg. Anim. Nat., 
fasc. I, 1856, p. 71; Flower, Nat. Hist. Review, 1863, p. 279, 
pl.; Schleg., Mus. Pays-Bas, Simiz, 1876, p. 22; Anders., 
Zool. Res. Exped. Yunnan, 1878, p. 10; Jd. Cat. Mamm. Ind. 
Mus. Calc., 1884, p. 24; Forbes, Handb. Primates, II, 1894, p. 
166, pl. XX VI; Beddard, Proc. Zool. Soc. Lond., 1900, p. 1871; 
Elliot, Cat. Mamm. Field Columb. Mus., F. C. M. Pub., VIII, 
1906, p. 576, Zool. Ser. 
Simia syndactylus (!) Raffles, Trans. Linn. Soc. Lond., XIII, 
1822, p. 241; Horsf., Zool. Res., 1824, pl.; Fisch., Syn. 
Mamm., 1829, p. 11. 
Siamanga syndactyla Gray, Cat. Mamm. Brit. Mus., 1843, p. 1; 
Id. Cat. Monkeys, Lemurs and Fruit-eating Bats, Brit. Mus., 
1870, p. 9; Horsf., Cat. Mamm. Mus. E. Ind. Co., 1851, p. 1; 
Dahlb., Stud. Zool. Fam. Reg. Anim. Natur., 1856, p. 71; Rei- 
chenb., Vollstand. Naturg. Affen, 1862, p. 165, figs. 419, 420. 
SIAMANG GIBBON. 
Type locality. Island of Sumatra. 
Geogr. Distr. Malay Peninsula? (Wallace) ; Tenasserim? (Hel- 
fer) ; Sumatra. 
Genl. Char. Size large; laryngeal pouch large; bare patch on 
