Elementary Anatomy of a Hound 59 



through the usage of time, yet many M.F.Hs. have 

 now abandoned the practice. 



The ear-flaps serve to protect the passage of the 

 ear against the entrance of foreign bodies, and are 

 regulated by muscles passing from the base of the 

 ear to the skull. 



The middle eafy or auditory passage, establishes a 

 communication with the internal ear and external 

 surroundings. 



The internal ear consists of three small bones, 

 known as the malleus, the stapes and the incus, 

 together with a drum-like structure, the tympanum 

 (ear drum), etc. 



The auditory nerve regulates the transmission of 

 sound to this membrane — the tympanic membrane, 

 which is semi-transparent and funnel-shaped. 



The labyrinth of the ear consists of the vestibule, 

 semicircular canals, and the cochlea, all complicated 

 structures, and no advantage would be gained in 

 entering into a description of them in a work of this 

 nature. 



The skin in the cavity of the ear is very thin. 

 Beneath it there are numerous folHcles, below which 

 there are glands. The latter secrete a waxy-like 

 material (cerumen), which helps to keep irritating 

 materials from injuring the delicate portions of the 

 internal ear. 



Inflammation of the skin within the ear is very 



