THE INTERNAL EAR, OR LABYRINTH 



1145 



The membranous cochlea, ductus cochlearis, or scala media consists of a spirally 

 arranged tube enclosed in the bony canal of the cochlea and lying along its outer 

 wall. 



COCHLEAR NERVE 

 AND GANGLION 



FIG. 853. Cochlea in transverse section. Observe especially the canal of the cochlea, which is a part of 

 the membranous labyrinth. (Testut.) 



Otolithic 

 membrane. 





Epithelium of 

 saccule. 



Tunica 



gfagtt 



giQSS 1 propria. 



Hematoxylin 

 and eosin. 



FIG. 854. Trans-section of the margin of the macula sacculi of a guinea-pig. X 325. (After Kolliker.) 



The osseous spiral lamina, as already stated, extends only part of the distance 

 between the modiolus and the outer bony wall of the cochlea. t A membrane. 

 the basilar membrane (membrana basilaris} (Fig. 852), stretches from its free edge 



