ZOOLOGICAL GARDENS. 
17 
hence its specific name, pileatus . Its under surface is 
sometimes bright orange, and owing to this circumstance 
the term chrysogaster has also been applied it. It is gener¬ 
ally of a mild disposition. 
Its call is very peculiar, and when I first heard it in this 
Garden, about sundown, and at a little distance off, I 
thought it was the voice of one of the large tree-geckoes of 
Arakan and Burma known as the Tuck-tu or Gecko vents , 
a lizard which of late years has been introduced into 
the neighbourhood of Calcutta by the boat traffic from 
Chittagong. 
The other Semnotes closely allied to these Langurs of 
India and Assam, are S. priamus found in Southern India 
and Ceylon ; and S', leucogaster also peculiar to Southern 
India. 
The Macaques, or common monkeys of Asia, differ great¬ 
ly in disposition from the generality of the Semnotes, as 
they are much more lively, imitative and aggressive. Some 
of them, especially the large pig-tailed monkeys, so called 
from their short up-turned tails, are very formidable, as 
they attain a considerable size, are extremely muscular, 
and their jaws are armed with canines equalling those of a 
leopard in size. 
Of this group the following species occur in India, viz., 
the common monkey or bandar , Macacus rhesus ; an allied 
species in Assam, M. assamensis , probably the same as M. 
rheso-similis ; and Macacus sinicus ; whilst in Ceylon there 
is a species, M. pileatus , resembling the latter in certain of - 
its features, but quite distinct from it, and peculiar to that 
island. A monkey, markedly distinct from any of the fore¬ 
going is also found in Southern India, viz., the so-called 
Satyr Monkey, Macacus silenus. In Assam, the fauna of 
c 
