58 MAMMALIA. QUADHUMANA. 



Fur ash- colour ed ; croup and tail annulated with gray brown 

 and ash-colour; a white spot on the forehead; very long ash- 

 coloured hair before and behind the ears ; remainder of the head 

 and shoulders brown red. Body six inches long. Shaw, i. pi. 25. 



Var. A. Fur red ; croup annulated with red and ash-colour. Inhabits Brazil. 



J. penicillatus, Geoff. Desm. The tufted Jacchus. Fur ash-colour- 

 ed ; croup and tail annulated with brown and ash-colour ; a 

 white spot on the forehead ; a tuft of long black hairs before the 

 ears; head and top of the neck black. About the size of the pre- 

 ceding; but the head smaller and more rounded -Inhabits Brazil. 



J. leucocephalus, Geoff. Desm. The white-headed Jacchus. Fur 

 red ; head and chest white ; upper part of the neck black ; tail 

 annulated with brown and ash-colour ; very long hair before and 

 behind the ears. Size of the two preceding Inhabits Brazil. 



J. auritus, Geoff. Desm. The great-eared Jacchus. Fur black 

 mixed with brown ; tail annulated with blackish and ash-colour ; 

 a white spot on the forehead ; a tuft of very long white hairs co- 

 vering the interior of the ears. Size of the preceding. 



J. humeralifer, Geoff. Desm. The white-shouldered Jacchus. Fur 

 chestnut brown ; tail slightly annulated with ash-colour ; shoul- 

 ders,, breast, and arms white Inhabits Brazil. 



Some naturalists regard the five last named as only varieties. 



** With tail not annulated. 



J. melanurns, Geoff. Desm. The black-tailed Jacchus. Fur brown 

 above, fawn-coloured below ; tail of a uniform black,, and a 

 fourth longer than the body. Inhabits Brazil. 



J. argentatus, Geoff. Desm. (Simia argentata, Lin.). The fair 

 monkey. Fur white ; face, feet, and hands red ; tail black or 

 white, but almost double the length of the body Inhabits Para 

 in South America. Shaw, i. pi. 26. 



Sub.-Gen. 2. TAMARIN, Midas, Geoff. Four upper incisors con- 

 tiguous, the intermediate being broader than the lateral ones ; 

 four lower incisors inclined, contiguous ; canines conical, pretty 

 strong, and inclining oulwards ; ears large ; forehead rendered 

 very apparent by the projection of the orbital ridge. 



J. rufimanus, Desm. (Simia Midas, Lin.) Fur black ; croup va- 

 riegated with gray ; hands and feet of a red colour ; body seven 

 or eight inches long. Inhabits Guiana, &c. Shan), i. pi. 26. 



J. ursulus, Desm. (Midas ursulus, Geoff.) Fur black ; back un- 

 dulated with bright red ; hands black. Size of the preceding. 

 Inhabits Para in South America. Audeb. vi. 2, fig. 6. 



J. labiatus, Desm. (Midas labiatus, Geoff.) Fur blackish ; ferru- 

 ginous red below ; head black ; nose and margins of the lips 

 white. Inhabits Brazil. 



J. chrysomelas, Desm. Kuhl. Fur black ; forehead and upper side 



