28 DIVISION I. VERTEBIiAL AXLM.U.S. — CLASS I. MAMMALIA. 



Genus Lagotituix ( (Tii.^troinaiyiic.f) . — The Gastro'inargucs have rouiul 

 heads, tails hke tlie prcccdiuy;, and thumbs hke tlie Stcntors. Two species 

 arc toh'rably well known — the Capparo {Ldgothrix, lldiitbohlCii) and the 

 Grisou (X. cxoiuft). 'iliey arc of a social uature, move in troo^is, and are 

 excessively gluttouous. 



Genus Ceuus {Capnchuis). ■ — -There arc fifteen or sixteen species of 

 tills group, but few of them, however, arc well known. They have a 

 round liead, thumbs distinct, and tlie ])rehensile tail entirely hairy. Their 

 general color is brown, and sonic of the species have tufts of hair upon 

 the forehead; one, the Horned Capuchin (Siiitia futueUiis, Linn/), has 

 them on each side, resembling horns. They emit a iiiusk-likc odor, and 

 arc distinguished for agility and gentleness of disposition. 



Genus Sa.miims. ■ — JJut one species is known,' the Siamiri {hlmia 

 scinrcd, Linn.), which is a very prett}' little animal, not larger than a 

 squirrel. The general color is yellowish-gray, the end of the nose is 

 black, and the limbs and extremities of deep yellow. The head is quite 

 flat, and the tail is but slightly prehensile, and cannot be used as a hand to 

 pick up objects. 



The abo\e genera, having 2>reliciisilc tails, are called Sapa-jous. The 

 tails of the remaining genera are without this character. Some of them, 

 called Fox-tailed Monkeys, have this member long and tufted. 



Genus Pitiiecia {^Sed-i's). — The Sakis compose three families or 

 groups. The Yarkc Saki [Pit/ircin leueocephala) belongs to the first. 

 It presents a remarkable ap[)carance, having very long hair, a whitish 

 head, and body and limbs of a lirown black. The Sakis dwell in thick 

 forests ; some of them feed on fruits and vegetables, and others on wild 

 bees, honey, and insects. Tiiey move in small bands. 



Genus Callitiikix {Sin/ouii/s). — 'J'here are .several species, of which 

 the best known arc the Masked Sagouiu { Cui/il./tri.c persoiiuta), the 

 Widow Sagouin ( C. liir/v/is), and (C iwlaiKK-hir). Some of these live 

 in pairs, others live in large societies, and hail the rising sun with loud 

 and discordant cries. 



These curious animals, of which eight species are described, inhabit the 

 forests of Brazil and Cayenne. They are excessively shy in captivity, and 

 will not move even to take food, however hungry they may be, when any 

 person is oljserving them. But left alone, they are exceedingly active, 

 darting, with the swiftness of a cat, upon whatever prey may be thrown to 

 them, and swallowing it in a moment. They never use the tail for support, 

 but when at rest, keep it wound round the body or limbs. "When sleeping, 

 they drop the head between the fore legs. They are beautiful little crea- 

 tures, rarely exceediug ten inches in length, exclusive of the tail, which 



