THE UAKARI MONKEYS. 1 73 



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. 



" I have mentioned the near relationship of the Night-Apes 

 to the Sai-miris {Chrysothrix), which are among 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 PITHECIIN^. 



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 



