PYGATHRIX 59 



Measurements. Total length, 1,173; tail, 705. Skull: total length, 

 89.1; occipito-nasal length, 78; Hensel, 60.4; zygomatic width, .7i; 

 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). 



Semnopithccus siamensis Miill. 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; Id. Cat. Mamm. Ind. Mus. Calc, 1881, 

 p. 51. 



Semnopithecus nigrimanus I. Geoff., Archiv. Mus. Hist. Nat., 

 Paris, H, 1843, p. 546; Id. 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 (!) (nee Raffles), Blyth, Journ. Asiat. Soc. 

 Beng., 1875, p. 9, extra no. 



Type locality. Siam, (Diard, Miiller 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. 



