238 



Organ of Hearing. 



Hiatus canal. Fallop. Genicul. 

 Orificium Canalic: 

 tymfan. 



t 



Aperba 

 Canal. Fallop. 



Geni.cvl.TL 



327. The Bon Labrinth from behind. Magn. =- 3. 



The Canalis s. Aquaeductus Fallopiac for tlie facial nerve, commencing 

 tit the blind pouch of the internal auditory me at us, runs in the 

 petrous portion first to the outside, then above the Fenestra ovalls posteriorly, 

 and finally to the Foramen stylo-mastoidmm downwards; the two angles 

 thus formed are called Genicula. In the first geniculum is the Hiatus s. 

 Apertura xpuria Canalis Fallopiae; here the Canaliculus tympanicus opens. 

 Uelow the second geniculum the Canalis Fallopiac, runs behind the Eminentla 

 pyramuhdt* : it communicates here with its cavity, then with the Canali- 

 culus inaxtouie.ns und with the tympanum through the Canaliculus chordae, 

 {Fig. 315). Both Aquaeductus cochleae ct vestlbuli have veins. 



