SYNOPSIS OP THE SIMIADJ3L 265 



blanche, Audeb. Simla hypoleuca, Cariblanco, Humb. 

 Obs. Zool. p. 356. Sapajou gorge blanche, Desm. Mamm. 

 p. 85. Black ; front, sides of the head, throat, and shoulders, 

 white. Inhabits Guiana. 



PLATE XXII. 16. C. MONACHUS, Large-headed Sapajou Le 



sa'i a grosse tete, Cebus monachus, F. Cuv. Hist. Nat. des 

 Mammif. A mixture of black and brown, irregularly 

 disposed, covers the back and sides ; breast, belly, sides ot" 

 the cheeks, and anterior part of arm, whitish-orange ; fore 

 arms, thighs, and tail, black ; a short black beard ; head 

 large. Native country unknown. 



Sometimes varied on the upper parts with white. Described by 

 F. Cuvier from a living specimen. 



GENUS XXI Cattithrix, CUVIER. 



The head round ; muzzle short ; facial angle about 60. Separa- 

 tion of the nostrils narrower than the range of the upper cutting 

 teeth ; tail long, entirely hairy, not prehensile ; nails straight, 

 raised, and somewhat claw-like. Animals of small size. 

 PLATE XXIII. 1. C. SCIUREUS, Squirrel callithrix, or Siamiri. 

 Simia sciurea, Linn. ; Siamiri, Audeb. ; F. Cuv. Hist 

 Nat. ; Desm. Mamm. Titi de TOronoque, Humb. Obs. 

 Zool. i. 322 and 257. Sagoin siamiri, Desm. Mamm. 

 p. 86. Grayish-biown, with a black muzzle ; extremities 

 bright reddish ; length of the body seven inches ; tail be- 

 tween thirteen and fourteen. Inhabits Brasil, Cayenne. 

 Varies in being entirely of one shade of brown, and with, the 



back bright reddish and black. 



2. C. PERSONATUS, Masked callithrix Callithrix a masque, 

 Geoff. Ann. du Mus. xix. p. 113. Simia personals, 

 Humb. Obs. Zool. i. p. 357. Sagoin a masque, Desm. 

 Mamm. p. 86. Grayish-yellow ; head and the four hands 

 black ; tail reddish. Inhabits Brasil between the 18 and 

 21 of south latitude. 



