70 MAMMALIA. . 



re\', of a yellowish grey; fore-arms, legs, and the four extremi- 

 ties of a yellowish fawn-colour; end of the nose black. 

 Those of the American monkeys, whose tails are not at all pre- 

 hensile, are called Sakis.(I) Several of them have that appendage 

 long and tufted, whence they have been also termed Fox-tailed Mon- 

 keys: their teeth project forwards more than those of the others. 

 They are the Pitheoia of Desmarets and Illiger. 



Simia pithecia, L. ; Buff. XV, 12; Pithecia inusta, Spix, pi. 

 10. (TheYarke.) Blackish; circumference of the face whi- 

 tish. 



Pith, hirsuta, Spix, pi. 8. (The Grey Sakis.) Grey hands; 

 yellowish. 



Simia satanus, Hofmansegg; Humb. Obs. Zool. L. xxvii. 

 (The Black Saki.) All black. 



Pith, rufiventris, Geoff.; Buff. Supp. VII, 31; Pith, capilla- 

 mentosa, Spix, pi. 2. (The Red-bellied Saki.) Brown, with 

 a red belly. 

 Spix distinguishes those species whose tails, although tufted, are 

 shorter than the body, by the name of Brachiurus. His Br. Oua- 

 raki, Sp. pi. 8, has a fawn-coloured body; head, neck, arms and 

 feet black. To this should be referred, provided always it is ano- 

 ther species, the Sim. melanocephala, Humb. Obs. Zool. p. 29; yel- 

 low, with a black head. 



In some, also, the Callithrix, Geoff, or Sagouins, Fr. Cuv. the 

 tail is slender, and the teeth do not project. The Saimiri were 

 associated with them for a long time, but the head of the Sagouins 

 is higher, and their canine teeth much shorter. Such are the 



Call, personata, Geoff., Spix, pi. 12.; Call, nigrifrons, id. 15. 

 (The Masked Monkey.) A yellowish grey; head and hands 

 black. 



Call, lugens; S. lugens, Humb. (The Widow Monkey.) 

 Blackish, with a large white gorget or neck-piece. The Call, 

 amicta, Geoff., Sp. pi. 15, and the Call, torquata, Hofmansegg, 

 can differ but little from this species. (2) 



(1) All the American monkeys whose tails are not prehensile, together with 

 the Ouistitis, are termed by Buffon Sagouins (Caliithrix, Erxl. ). This name 

 of sagouin or gagui is in fact applied in Brazil to all the little Quadi'umana, whose 

 tails are not prehensile. 



N.B. M. Geoff., Ann. Miis. XIX, 112, 113, gives to his Callithrix, which are 

 merely a division of those of Erxleben Nodhorus and Fithecia, the common name 

 of Geopithecus. 



(2) Add Call, melanochir, Pr. Max. C. cinerascens, Spix, pi. 14, is the young of 

 the same according to Temminck. C. cuprea, Spix, pi. 17. C gigo, id. pi. 16. 



