102 CEBUS 



brown ; sides of body and arms to elbows, and front of forearms and 

 thighs orange yellow ; front of thighs and legs below knees, inner side 

 of forearms, hands and feet black ; throat and under parts orange 

 yellow ; tail, basal fourth beneath orange yellow, rest above and beneath 

 blackish brown. Skull in specimen. Ex type ? Spix, Munich Museum. 

 Measurements. Skull, not of type: total length, 88; occipito-nasal 

 length, 85 ; zygomatic width, 55 ; intertemporal width, 38 ; median 

 length of nasals, 11; length of upper molar series, 18; length of 

 mandible, 50; length of lower molar series, 23. juv. (^. Leyden Museum 

 specimen. 



This is a pale yellow brown monkey with rather long hair on the 

 top of the head, which probably could be erected at the will of the 

 animal, but which would never exhibit tufts like C. cirrifer or others 

 of the tufted group, but probably would exhibit these in a moderate 

 degree. There are two specimens in the Munich Museum both marked 

 'Type,' and which differ somewhat in color. One, the smaller is 

 described above ; the other and larger animal, has the limbs, hands and 

 feet brown, more as shown in Spix's figure, although in his description 

 he states, speaking of "Les poils," "ceux des mains et des pattes sont 

 entierement noirs et tres courts." Whether this difference in color 

 is caused by age or sex it is difificult to say, but both examples seem to 

 be adult. I have selected the one agreeing with Spix's description, 

 though not with his figure, as probably the best representative of the 

 species. 



Cebus fatuellus (Linnjeus). 



Simia fatuellus Linn., Syst. Nat., I, 1766, p. 42: Bodd., Elench. 

 Anim., 1784, p. 62; Schreb., Saugth., I, 1775, p. 118, pi. 

 XXVIIB ; Audeb., Hist. Nat. Singes et Makis, 1797, Fam. V, 

 Sec. Ill, p. 1, pi. I. 



Cebus fatuellus Erxl., Syst. Reg. Anim., 1777, p. 51; E. Geoff., 

 Ann. Mus. Hist. Nat. Paris, XIX, 1812, p. 109; Id. Cours 

 Hist. Nat. Mamm., 1828, p. 8, lOme LeQon ; Kuhl, Beitr 

 Zool., 1820, p. 32 ; Desm., Mamm., 1820, p. 84 ; Fisch., Syn 

 Mamm., 1829. p. 45; Less., Spec. Mamm.. 1840, p. 139 

 Wagn.. Schreb., Saugth. Suppl., I, 1840, p. 209; V, 1855, p 

 84; Flow., Proc. Zool. Soc. Lond., 1865, p. 333; Schleg., Mus 

 Pavs-Bas, Simis, 1876, p. 207; Forbes, Handb. Primates, I, 

 1894, p. 211, (Part.). 



Cebus buffoni Less., Spec. Mamm., 1840, p. 140. 



