40 ATELEUS 



1820, p. 24; Desm., Mamm., 1820, p. 74; F. Cuv., Hist. Nat. 



Mamm., 2me ed., 1833, p. 158, pi. LVII; Blainv., Osteog., 



1841, Atl., Cebus, pi. I; Less., Spec. Mamm., 1840, p. 132; 



Wagn., Schreb., Saugth. Suppl., I, 1840, p. 199; V, 1855, p. 



78, pi. XXVI; I. Geoff., Cat. Primates, 1851, p. 49; Dahlb., 



Stud. Zool. Fam. Reg. Anim. Natur., fasc. I, 1856, pp. 171, 



172; Reichenb., Vollstand. Naturg. Affen, 1862, p. 62, figs. 



149, 152; Gray, Cat. Monkeys, Lemurs and Fruit-eating Bats, 



Brit. Mus., 1870, p. 44 ; Schleg., Mus. Pays-Bas, Simiae, 1876, 



p. 176. 

 La Marimonda Humb., Rec. Obs. Zool., I, 1811, (1815), p. 325. 

 Simla belsebuth Humb., Rec. Obs. Zool., I, 1811, (1815), p. 353. 

 Ateles (!) fidiginosus Kuhl, Beitr. Zool., 1820, p. 26; Schleg., 



Mus. Pays-Bas, Simiae, 1876, p. 179, (Part). 

 Cebus fuliginosus Fisch., Syn. Mamm., 1829, p. 40. 

 Cebus brissonii Fisch., Syn. Mamm., 1829, p. 40. 

 Ateles (!) vellerosus Gray, Proc. Zool. Soc. Lond., 1865, p. 733; 



Id. Cat. Monkeys, Lemurs and Fruit-eating Bats, Brit. Mus., 



1870, p. 44. 



MEXICAN SPIDER MONKEY. 



Type locality. Banks of the Orinoco. Neither Geoffroy's type 

 nor Kuhl's type is in the Paris Museum. Gray's type of vellerosus is 

 in the British Museum. 



Geogr. Distr. South America on the banks of the Orinoco, above 

 the great rapids of Atures and Maypures, (Humboldt). 



Genl. Char. Hair long, soft, falling over sides like a mantle. 



Color. Head, outer side of arms, legs from above knees to 

 ankles, hands, feet, and upper side of tail black ; upper part of back 

 and rump, blackish chestnut ; lower back golden ; sides deep orange or 

 tawny ; whiskers, throat, inner side of limbs, grayish yellow ; under side 

 of tail yellowish brown. Sometimes the lower back and sides are pale 

 brownish yellow ; under parts cream color. Ex type of A. vellerosus 

 in British Museum. 



Measurements. Skull : total length. 111 ; occipito-nasal length, 95 ; 

 Hensel, 74; intertemporal width, 49; palatal length, 33; zygomatic 

 width, 72 ; breadth of braincase, 57 ; median length of nasals, 16 ; length 

 of upper molar series, 24; length of mandible, 71; length of lower 

 molar series, 29. 



Neither the type of A. belzebuth, nor that of A. fuliginosus is 

 now in the Paris Museum. The earliest specimen of A. belzebuth is 

 dated 1836, and the animal died in the Menagerie; the next is 1840, 



