THE UAKARI MONKEYS. 173 
itself to be caressed ; but when handled roughly it always took 
alarm, biting severely, striking with its little hands, and making 
a hissing noise like a Cat. 
‘“‘T have mentioned the near relationship of the Night-Apes 
to the Sai-miris (CArysothrix), which areamong the commonest 
of the ordinary Monkeys of the American forests. This near 
relationship is the more necessary to be borne in mind, as 
some Zoologists have drawn a comparison between them and 
the nocturnal Apes of the Lemur family, inhabiting Ceylon 
and Java, and it might be inferred that our American Ei-as 
were related more closely to these Old World forms than they 
are to the rest of the New World Monkeys. The large noc- 
turnal eyes and short ears of the Eastern Lemurs are simply 
resemblances of analogy, and merely show that a few species, 
belonging to utterly dissimilar families, have been made similar 
by being adapted to similar modes of life. . . .” 
THE SAKIS. SUB-FAMILY PITHECIINA. 
The Sakis are characterised by having their lower incisor 
teeth inclined forward at their summits somewhat as among 
the Lemurs ; and separated from the long canines by an inter- 
space. ‘The molar teeth are small; the tail, which in some is 
long, in others short, is non-prehensile. The nostrils are, as 
usual, far apart, and the thumb is well developed. The ears 
are large. Great differences in the character of the fur exist 
in the group: some species having long hair over the whole 
body, others on the chin and cheeks ; some are well bearded, 
while others again are quite bald. 
The Sakis are divided into two genera, a short-tailed group 
(Brachyurus), containing the Uakari Monkeys, and a long-tailed 
