MAN AND APES. 
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kinds is remarkable. The Gribbons, like the two preceding genera , 
have no vestige of a tail. 
Fig. 3. 
The Siamang Gibbon {Hylohates). 
Fig. 4. 
The Entellus Monkey {Semnoyithecus). 
The second sub-family embraces a number of large long-tailed 
species of monkeys, grouped into two genera. The first of these, 
