ON THE LARYNX AND OESOPHAGUS OF A COMMON MACAQUE. 27 



2. Description of the Larynx and CEsophagus of a Common 

 Macaque (Alacacus fascicularis) exhibiting several Ab- 

 normal Characters. By C. F. Sonntag, M.D., Ch.B., 

 F.Z.S., Anatomist to the Society. 



[Received January 10, 1920 ; Read February 10, 1920.] 



(Text-figures 1-5.) 



The specimen which forms the subject of the present com- 

 munication was preserved among a series of tongues in the 

 Society's Prosectorium. When a dissection was made, the rare 

 conditions shown in text-fig. 2 were revealed, and the normH.l 

 state is illustrated in text-fig, 1 for comparison. One of the 



Text-figure 1. 



Text-figure 2. 





£. 



Text-fig. 1. — Tlie normal tongue, larynx, and ojsophagus. A. Ridge of mucous 

 membrane. C. Posterior surface of larynx clothed with mucous membrane. 

 E. Recess. 



Text-fig. 2. — The abnormal tongue, larynx, and oesophagus. B. Posterior car- 

 tilaginous plate. A, C, E as in text-f.g. 1. 



