458 MANUAL OF ELEMENTARY ZOOLOGY 



conjunctiva and passes into the nose by the nasal duct at 

 the inner angle of the eye. The structures of the outer and 

 middle ear have been mentioned (p. 430). In the inner 

 ear there is present a large, spiral division of the labyrinth, 

 known as the cochlea, which contains the endings of those 

 fibres of the auditory nerve which subserve the sense of 

 hearing. In the nasal cavities (p. 437) the olfactory epi- 

 thelium is restricted to the upper part of the olfactory 

 chamber, the rest of the organ serving to warm and moisten 

 the air on its way to the lungs. Elaborate taste papilla of 

 several kinds are found on the tongue, and are supplied 

 with fibres which run in the glossopharyngeal and chorda 

 tympani nerves. 



