THE SQUIRREL-MONKEYS. £57 
with the angle of the mouth; but Mr. Buckley says the 
Indians consider the black lines to be merely a sign of age. 
Distribution—This species has an extensive range, being 
found on both banks of the Amazon, Rio Negro, and on the 
Copataza river ; also in Guiana, Surinam, and Colombia, near 
Bogota. 
Habits.—Like its congeners, the Common Squirrel-Monkey is 
arboreal, going about in large flocks. Their food consists of 
insects and fruits. Mr. Bates observes that the “pretty little 
Chrysothrix sciureus contents itself with devouring what fruit 
it can on the spot,” thus differing from certain species of Cebus, 
which destroy more than they eat, and when about to return 
to the forest, carry away all they can in their hands or under 
their arms. 
Mr. Darwin has remarked in his “ Expression of the 
Emotions in Man and Animals,” that “ with Monkeys the 
expression of any painful emotion is not easily distinguished 
from that of anger.” ‘‘ Humboldt,” he adds, “also asserts that 
the eyes of the Ca/dthrix sciureus ‘instantly fill with tears 
when it is seized with fear’; but when this pretty little Monkey 
in the Zoological Gardens was teased, so as to cry out loudly, 
this did not occur. I do not, however, wish to throw the least 
doubt on the accuracy of Humboldt’s statement.” 
This species is a great favourite wherever it has been kept 
in captivity. It is very bright coloured, has a baby-like face, 
large and bright eyes, and most gentle manners. These Mon- 
keys are very sensitive to cold, and when a sudden fall in the 
temperature takes place, they huddle close together, clasping 
each other with their arms, and embracing their neighbours 
and themselves with their long tails. 
