CINCINNATI ZOO GUIDE 
THE SEMNOPITHECINAE 
These are a class of monkeys possessed of very long tails, and 
are found in both Asia and Africa. 
The Sooty Mangabey ( Cercocebus fulinginoisus). Also be¬ 
longs to this division. Its name indicates its color and it has 
white eyelids. It is lively and active, and one of the best cage 
monkeys. 
The Proboscis Monkey ( Semnipithecus nasalis). So called 
because of its long nose, and many other varieties are included 
in this class. 
The remaining genera of the Old World monkeys are included 
in a sub-family, Cynopithecinae. These monkeys are well rep¬ 
resented in the collection. 
Mona Monkey ( Cercopithecus mono). One of the most notable. 
This is a native of West Africa. It is one of the most cunning and 
active monkeys known, and when tamed and permitted to run 
at large around the house, does many mischievous tricks. It can 
untie knots and search pockets with a delicacy of touch not 
equalled by the most adroit thief. It is always gentle and 
playful and likes to be caressed. 
The Vervet ( Cercopithecus lalandii). A native of South Africa, 
and feeds on the gum of the acacia. Its fur is greyish-green and 
it has black hands, feet and face. These monkeys are often seen 
in confinement. 
The Green Monkey ( Cercopithecus callitrichus ). Famed from 
Senegal to the Niger. Its color is dark green. It is apparently 
voiceless. At least it utters no sound in confinement. 
The Pig-tailed Monkey ( Macacus nemestrinus). Found in the 
Malay Peninsula and in Sumatra, Borneo and Java. It is said 
that in Sumatra the natives train the monkeys to climb cocoa- 
nut trees and gather the fruit. This is only one of the numerous 
varieties of the macacus monkey, which has a head bearing 
some resemblance to that of the baboon. They are easily 
domesticated and are always represented in the collection. 
The Arabian Baboon ( Cynocephalus hamadryus). This animal 
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