vin 



THE COCHLEA 



377 





PlO 121.— SfCTION Ol ( OIL OF COCHLEA. 



Sc.V, scala vestibuli ; Sc.T, scala tympani ; C.C. canalis cochlearis, or 

 scala media; O.C, organ of Cortl ; m.R, membrane of Reissner, m.t, 

 membrana tectoria (a gelatinous membrane overlying the organ of Corti, 

 and supposed to act as a damper). A.N, fibres of the auditory nerve 

 running in l.i, the lamina spiralis, and ending in the organ of Corti ; 

 a, connective tissue cushion to which the basilar membrane is attached 

 on the outside ; 6, bony walls. 



The figure has, for simplicity's sake, been made somewhat diagram- 

 matic. The lamina spiralis has been drawn too short ; the proportions 

 of the lamina spiralis and the scalse are more exactly rendered in Fig. 120. 



