ORGAN OF CORTI. 

 Fig. 326. 



153 



Fig. 326. The organ of Corti of the Dog, vestibular surface view, 

 magnified 700 diameters. The membrane of Reissner and the mem- 

 brana tectoria have been removed. A, crista spiralis, in part of a 

 dark colour in consequence of the nerves, which have been stained 

 black by perosmic .add, being seen through it ; B, epithelium of the 

 sulcus spiralis internus ; C, capitate ends of the rods or pillars of 

 Corti ; X), lamina reticularis ; E, external epithelium of the membrana 

 basilaris ; a, cells of the sulcus spiralis seen indistinctly through the 

 auditory teeth ; 6, external boundary line of the auditory teeth (the 

 latter, on account of the deeper focussing required, being scarcely 

 perceptible) ; c, cuticular meshwork between the internal epithelial 

 cells ; dj position of the vas spirale ; e, internal hair cells ; /, capitula 

 of the internal pillars ; fi, capitular laminae of the internal pillars ; 

 (the opposed capitular laminae form with higher focussing a clear 

 cuticular roof over the heads of the external pillars, stretching 

 from the internal to the external hair cells ;) </, boundary line between 

 the external and internal pillars ; h, heads of the external pillars 

 glimmering through the capitular laminae of the internal pillars ; (each 



