PLATE 10. 
Smithsonian Report, 1914.—Robinson. 
SE SSS PED 
CEES I 
RX Pezestee REP EE 
pees, 
8. Chimpanzee. 
g 
Oran 
ceitinsai i ae a 
6 
Siamang. 
Soe 
66. 
flees oe 
and the proportions of the 
Man. 
0. 
genio-glossus muscle. 
Dog. 
Figs. 66-71 show the under surface of the tongue 
69. 
