

1041 



external, or mucous, derived from the mucous lining of the tympanic cavity; an 

 internal, from the lining membrane of the cochlea; and an intermediate, or fibrous 

 layer. 



Tympanic antrum 



Tegmen tympani 



Prominence of lateral semicircular canal 

 Prominence of facial canal 

 Fenestra vestibuli 



Bristle in semicanal for Tensor tympani 

 Septum canalis musculotubarii 



Bristle in hiatus of facial canal 



Carotid canal 

 Bony part of auditory tube 

 Promontory 

 Bristle in pyramid 

 Fenestra cochleae 



Sulcus tympanicus 



Mastoid cells Bristle in stylomastoid foramen 

 Fio. 913. Coronal section of right temporal bone. 



JUNCTION BETWEEN MAS- 

 TOID ANTRUM AND 

 EPITYMPANIC RECESS 

 I TEGMEN 

 TYMPANI 



( EPITYMPANIC 

 RECESS 



PROMINENCE OF EXTERNAL 

 SEMICIRCULAR CANAL 



PROMINENCE OF AQUEDUCT 

 OF F.ALLOPIUS 



TENDON OF 



PEDIUS MUSCLE 



PLICA 



PROCESSUS 



:ARI FORMIS 

 TENSOR TYMPANI 

 MUSCLE (cut through) 



WALLOP 



LABYRINTH 



POSTERIOR 

 SINUS 



PYRAMIDAL 

 EMINENCE 



TYMPANIC 

 SINUS 



FOSSULA OF 

 FENESTRA ROTUNDA 



TYMPANIC 

 PLEXUS 



FIG. 914. The medial wall and part of the posterior and anterior walls of the right tympanic cavity, lateral view. 



(Spalteholz.) 



66 



