THE BONY LABYRINTH 



3 2I 



The bony labyrinth consists of the vestibule, cochlea and 

 semicircular canals. The vestibule occupies the mid-portion 



FIG. 91. 



/, Transverse section of a turn of the cochlea; II, A, ampulla of a semicircu- 

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

 T, otoliths; ///, scheme of the human labyrinth; IV, scheme of a bird's laby- 

 rinth; V, scheme of a fish's labyrinth. (Landois.) 



of the labyrinth, and is that part with which the middle ear 

 communicates by the fenestra ovalis; it communicates also 



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