3 20 



THE SENSES 



from the front of the vestibule, winds about two and a half times 

 around a cone-shaped central axis the modiolus and ends 



FIG. 91. 



I, Transverse section of a turn of the cochlea; II, A, ampulla of a semicircular 

 canal with the crista acustica; a, auditory cells, p, provided with a fine hair; T, 

 otoliths; III, scheme of the human labyrinth; IV, scheme of a bird's labyrinth; V, 

 scheme of a fish's labyrinth. (Landois.) 



in a blind apex. The canal of the cochlea is partially separated 

 into two compartments by a bony plate, the lamina spiralis. 



