20G 



THE GENERAL ANATOMY OF GORILLA [SECT. A 





Fig. 138. Tongue and superior laryngeal aperture of a young Chimpanzee. 

 (Mus. Anat. Cant.) 



Fig. 139. Superior laryngeal aperture of an adult male Orang-utan. (Specimen 

 M.C.H., Mus. Anat. Cant.) To be contrasted with Fig. 137. 



