40 
MAMMALIA. 
black; it lias no thumbs on its hands; but, instead of these, 
there are very small projections or appendices ; the tail prehen¬ 
sile, naked, and has a second covering of a very delicate and 
sensitive skin, highly susceptible of touch. 
Inhabits South America; common in the woods of Erazil 
and Guiana. 
Genus 9.—Lagothrix. — Humboldt. 
Generic Character. —Incisory teeth *, canines J-J, grinders 
; total 36. Facial angle 50 degrees ; head round; muzzle 
projecting; limbs proportioned to the body; anterior hands fur¬ 
nished with nails, divided with a thumb. Tail strongly prehen¬ 
sile, with the lower part of the extremity naked j hair of a 
woolly texture. 
Lagothrix Humboldtii . —The Capparo. 
Hair long, of a blackish ash-colour; body twenty-eight inches; 
tail nearly thirty inches. 
Inhabits the banks of the River Guariara, South America. 
Genus 10.— Mycetes. — Illiger. 
Generic Character. —Incisory teeth canines grinders 
total 36. Facial angle 30 degrees; head pyramidical; 
visage oblique ; os hyoides extremely ventricose; outside pro¬ 
minent ; the anterior hands provided with a thumb; tail very 
long; naked at the lower extremity. 
Mycetesfusca. — The Guariba ; or Preacher Monkey. 
Plate VI. fig. 2. 
Fur smooth, glossy, dark chestnut-brown ; paler on the back 
and head ; with a round beard beneath the chin ; feet and point 
of the tail brown. Size of a fox. Inhabits the woods of Gui¬ 
ana, in immense societies. 
Genus 11 — Cebu s — Erxleber. 
Generic Character. —Incisors canines J-}* grinders {i-jl; to- 
