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PROCEEDINGS' 



[1^ AUG " 1 1921 



GENERAL MEETINGS FOR SCIENTIFIC BUSINESS 



ZOOLOGICAL SOCIETY OF LONDON. 



PAPERS. 



1. The Comparative Anatomy of the Tongues of the Mam- 

 malia. II. Family 1. Simiidfe. By Chakles F. 

 SoNNTAG, M.D., Ch.B., F.Z.S., Anatomist to the 



Society. 



[Received October 14, 1920: Eead February 8, 1921.] 

 (Text-figm-es 1-9.) 



Contents. Page 



Introduction 1 



The Chimpanzee 2 



The Gorilla 9 



The Orang-Outan 14 



The Siamang 17 



The Slender Gibbon 19 



The Hoolock Gibbon 20 



The Bornean Gibbon 22 



The White-handed Gibbon 25 



Summary and Conclusions 28 



Bibliography 29 



Introduction. 



Many papers dealing with the anatomy of the Anthropoid 

 Apes contain details of the macroscopic appearances of the 

 tongues. Most of the authors, however, have limited their 

 accounts to the description of one or more salient features, such 

 as the number and arrangement of the vallate papillee. More 

 attention, too, has been paid to the large Anthropoids than to 



Proc. Zool. Soc— 1921, No. 1. 1 



