PY GATE EX 59 
Measurements. Total length, 1,173; tail, 705. Skull: total length, 
89.1; occipito-nasal length, 78; Hensel, 60.4; zygomatic width, .73; 
intertemporal width, 47.8; palatal length, 27.9 ; median length of nasals, 
.80 ; length of upper molar series, 23.4; length of mandible, 65.4; length 
of lower molar series, 27.4. Ex type United States National Museum. 
PYGATHRIX SIAMENSIS (Miiller and Schlegel). 
Semnopithecus siamensis Mill. und Schleg., Verhandl. Geschied., 
1841, p. 60; Schinz, Syn. Mamm., I, 1844, p. 40; Wagn., 
Schreb., Saugth. Suppl., V, 1855, p. 25; I. Geoff., Cat. Pri- 
mates, 1851, p. 16; Gerv., Hist. Nat. Mamm., 1854, p. 63; 
Dahlb., Stud. Zool. Fam. Reg. Anim. Nat., fasc. I, 1856, pp. 
88, 90; Gray, Cat. Monkeys, Lemurs and Fruit-eating Bats, 
Brit. Mus., 1870, p. 16; Blyth, Journ. Asiat. Soc. Beng., 
XLIV, 1875, p. 9, extra no.; Anders., Zool. Res. Exped. 
Yunnan, 1878, p. 37; Jd. Cat. Mamm. Ind. Mus. Calc., 1881, 
p. 51. 
Semnopithecus nigrimanus I. Geoff., Archiv. Mus. Hist. Nat., 
Paris, II, 1843, p. 546; Jd. Cat. Primates, 1851, p. 16; Rei- 
chenb., Vollstand. Naturg. Affen, 1862, p. 99, no fig.; Mivart, 
Proc. Zool. Soc. Lond., 1864, p. 626; Blyth, Journ. Asiat. 
Soc. Beng., XLIV, 1875, p. 9, extra no. 
Semnopithecus albo-cinereus Blyth, Journ. Asiat. Soc. Beng., XII, 
1843, p. 175; XVI, 1847, p. 733; Wagn., Schreb., Saugth. 
Suppl., V, 1855, p. 29; Blyth, Cat. Mamm. Mus. Asiat. Soc. 
Beng., 1863, p. 15. 
Semnopithecus argentatus Blyth, Horsf., Cat. Mamm. Mus. E. 
Ind. Co., 1851, p. 7. 
Semnopithecus (Trachypithecus) siamensis Reichenb., Vollstand. 
Naturg. Affen, 1862, p. 91, not figured. 
Semnopithecus cinereus Mivart, Proc. Zool. Soc. Lond., 1864, p. 
626. 
Presbytis cristatus (!) (nec Raffles), Blyth, Journ. Asiat. Soc. 
Beng., 1875, p. 9, extra no. 
Type locality. Siam, (Diard, Miller and Schlegel). 
Genl. Char. Head with a moderate compressed crest. 
Color. Forehead blackish brown; rest of head and upper parts 
grayish brown; cheeks pale yellowish brown; hands and feet brownish 
black; tail blackish; a whitish line on inner side of leg; under parts 
yellowish gray; face black; around eyes and mouth flesh color; hairs 
on head radiating from a center. 
