BRACHYTELEUS 51 



Eriodes tuberifer E. Geoff., Mem. Mus. Hist. Nat., Paris, X\'II, 

 1829, p. 163: Less., Spec. Mamm., 1840, p. 135; Dahlb., 

 Stud. Zool; Fam. Reg. Anim. Natur., fasc. I, 1856, p. 135 ; 

 Reichenbr., \'ollstand. Naturg. Affen, 1862, p. o7, figs. 41, 42. 



Eriodes arachnoides E. Geoff., JNIem. Mus. Hist. Nat., Paris. XVH, 

 1828, p. 160; Wagn., Schreb., Saugth. Suppl., I, 1840, p. 204, 

 pi. XXVI D ; V, 1855, p. 80 ; Less., Spec. Mamm., 1840, p. 136 ; 

 Blainv., Osteog., 1840, Atl., Cebus, pi. V; I. Geoff., Cat. 

 Primates, 1851, p. 51; Reichenb., Vollstand. Naturg. Affen, 

 1862, p. 57, fig. 140; von Pelz., Bras. Saugeth., 1883. p. 8. 



Cebus hypoxanthus Fisch., Syn. INIamm., 1829, p. 38. 



Cebus arachnoides Fisch., Syn. Mamm., 1829, p. 38. 



Brachyteles ( !) arachnoides Gray, List Spec. Mamm. Brit. Mus.. 

 1843, p. 10; Id. Cat. Monkeys, Lemurs and Fruit-eating Bats, 

 Brit. Mus., 1870, p. 45 ; Forbes, Handb. Primates, L 1894, p. 

 226. 



BROWN WOOLLY SPIDER MONKEY. 



Type locality. "le Bresil." Type in Paris Museum. 



Geogr. Distr. South eastern Brazil. Cape St. Roque to Rio de 

 Janeiro. 



Genl. Char. Size large ; face naked ; thumb rudimentary or 

 absent ; hairs of head short, directed backward. 



Color. Varying somewhat among individuals. Head blackish 

 brown washed with yellow, or dark gray washed with brown, or with 

 the forehead and nape orange rufous, and top of head chestnut ; upper 

 parts dark gray ; limbs gray of varying intensity, some specimens when 

 the head is reddish have the limbs and tail rufous, in others the tail is 

 a yellowish gray: under parts pale or yellowish gray or washed with 

 rufous; base of tail beneath varying from pale gray to black; hands 

 and feet yellowish gray with the fingers and toes chestnut, or yellowish 

 brown; an all reddish color does not seem to indicate sex, for some 

 females are more richly colored than the males, that is, exhibit more 

 rufous shades and deeper tints generally. The prevailing color of the 

 major portion of examples is a yellowish gray or ashy brown. 



Measurements. Total length, 1,280; tail, 670; foot, 150. Skull: 

 total length, 115; occipito-nasal length, 94; Hensel, 87; intertemporal 

 width, 47; palatal length, 38; breadth of braincase, 61 ; median length 

 of nasals, 19 ; zygomatic width, 77 ; length of upper molar series, Zi : 

 length of mandible, 85 ; length of lower molar series, 37. 



The type of the species is in the Paris Museum and was presented 

 to the Institution in 1806, over one hundred years ago by its describer 



