oval, 
THE WOOLLY MONKEYS. 221 
of the hare, and hence this name, from Aayis, a hare, and 6p/€, 
tptxos, hair, was adopted for the new genus, which was after- 
wards established by Geoffroy St. Hilaire. 
The hair of the crown is short and directed backwards ; the 
tail is long and perfectly prehensile, being naked and sensitive 
for a considerable distance back from the tip. The limbs are 
moderately long, and the thumb and great-toe are well deve- 
laped, the nails of the digits being compressed and pointed. 
In, regard to the skeleton, the skull of Zagothrix, as Dr. 
Slack points out, can be readily distinguished from that of the 
Capuchins by a broad, well-marked, articulation taking place 
between the pre-maxillary and the nasal bones at right angles 
to the suture between the latter, while in the Capuchins no 
true articulation takes place between these bones. ‘The lower 
jaw is larger than in Cedus, approaching the size and form of 
Mycetes. ‘The incisor teeth are small and unequal, the upper 
inner incisor being the largest ; the canines are very large and 
grooved in front. 
The Woolly Monkeys are slow in motion, gregarious, diur- 
nal, and arboreal. ‘The “ Barrigudos,” as they are called by 
the Portuguese colonists, live exclusively on fruits, and are 
larger and less active than the Capuchins. They are confined 
to the forests of the Ecuador district of the Upper Amazon 
Valley, and along the slopes of the Andes, north to Venezuela 
and south to Bolivia. 
They are of a mild disposition, and, as Mr. Wallace remarks, 
they are the species “most frequently seen in confinement, 
and are great favourites, from their grave countenances, which 
resemble the human face more than those of any other Mon- 
keys, their quiet manners, and the great affection and docility 
they exhibit,” 
