OF THE PENINSULAR REGION. 3 



Family HOMINIDAE. 

 (Man). 



Contains one species, Man, which differs so greatly from 

 all other mammals on account of its highly developed oppos- 

 able thumb and powers of speech that it is always given 

 separate treatment. 



Family SIMIIDAE. 

 (Man-like Apes). 

 Key to the Genera. 



A. A naked gular pouch beneath the chin SYMPHALANGIA. 



B. No naked gular pouch beneath the chin HYLOBATES. 



Genus Symphalangus. 



This genus contains the " Siamang, " the largest ape 

 inhabiting the Malay Peninsula. The arms are so long that 

 the knuckles of the hand touch the ground when the animal 

 is standing erect. Small naked callosities are present on the 

 buttocks and a pronounced web connects the toes of the feet. 

 The hair of the forearm is directed upwards towards the elbow 

 and the species has a more developed chin than any other ape. 

 The voice is very powerful. 



1.* Symphalangus continentis, Thomas. The Siamang. 

 Ann. & Mag. Nat. Hist., Ser. 8, Vol. 1, p. 1908. Hylo- 

 bates syndactylies, Flower, P. Z. S. 1898, p. 924 ; Eobin- 

 son, Jour. F. M. S. Mus. 1905, p. 26. Symphalangus 

 syndactylies, Bonhote, Jour. F. M. S. Mus. 1908, p. 2. 



Malay name " Siamang." 



Colour of fur black throughout with the exception of a 

 scanty whitish patch on the chin. Naked skin of face, gular 

 pouch, hands and feet black. Head and body about 20 inches. 



R. A. Soc, No. 53, 1909- 



