SYNOPSIS OP THE 



Chameck, Buff. xv. 21. Humboldt, Zool. Obs. 



II. Lagothrix. Humboldt. Facial angle of 50° ; head 

 round, the limbs proportioned to the body, anterior hands pro- 

 vided with a thumb. Tail strongly prehensile, with the lower 

 part of the extremity naked. 



66. 1. S. L. Humboldtii (The Capparo). Blackish ash- 

 colour, hairs long-. 



Simia lagothricha, Humb. Obs. Zool. 32. Lagothrix 

 Humboldtii. Geoff. Ann. Mus. xix. 107. 



Icon. 



Inhabits the Banks of the Rio Guariara. 



67. 2. S. L. Canus (Silver-haired Monkey). Olivaceous 

 gray ; head, hands, and tail red-gray ; hairs short. 



Lagothrix Canus. Geoff. Ann. Mus. xix. 107. 



Icon. 



Inhabits Brazils. 



III. — Mycetes.— Illiger. Facial angle 30° ; head pyramid 

 dical ; visage oblique ; os hyoides very ventricose, outside 

 prominent ; the anterior hands provided with a thumb ; tail 

 very long, naked at the lower part of the extremity. 



68. 1. S. M. Seniculus (The Mono Colorado, or Red 

 Howling Monkey). Upper part of the body fire-red ; head, 

 extremities, and tail very lively deep red ; face naked, 

 black. 



Simia seniculus, Lin. Sys. Nat. 37. Mycetes seniculus, 

 Illiger, 70. Stentor seniculus, Geoff. Ann. Mus. xix. 107. 



Alouate, Buff. xv. Mono Colorado, Humb. Obs. Zool. 342. 

 Royal Monkey, Pe72?i. Quad. 215. 



Icon. Buff. XV. t. 5. Suppl. vii. t. 15. Audeb. Hist. 5.f. 1, 

 Schreb. t. 25. b. Griff. Quad. t. 27. 



Inhabits Guyana, near Carthagena ; the Banks of the 

 river Saint Magdeleine, and Brazil. 



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