semicircular 

 canals 



f labyrinth^ 

 [inner ear )\^ 



COChka- 



Eusiachia. 

 tube~~'i 



Fig. 103. The Human Organ of Hearing and Balance. 



(A) Transverse section (after Cunningham); (B) Diagram section of 

 the cochlea; (C) Greatly enlarged view of the cochlear duct. 

 [For details, see pp. xxxvii, xxxviii. 



203 



