80 



THE ORGAN OF COETI. 



Fig. 49. — Tympanal wall of the ductus cochlearis, from the dug. Surface view from 

 the side of tbe scala vestibuli, after the removal of Reissner's mi.-utbrane, ^^^. L 

 Zona denticulata Oorti. H. Zona pectinata Todd-Bowman: 1, Habenula sulcata 

 Corti ; 2, Habenula denticulata Corti, 3, I-labenula perforata Kolliker. III. Organ 

 of Corti: a, portion of the lamina ypnalis o.'^sea (tbe epithelium is wanting); b and 

 c, periosteal blood-vessels ; d, line uf attachment of Heissner's membrane ; e and 

 6/, epithelium of the crista spiralis;/, auditory teeth, with the interdental furrows; 

 g, //,, large-celled (swollen) epithelium of tbe sulcus spiralis internus, over a certain 

 extent shining through the auditory teeth ; from the left side of the preparation 

 they have been removed ; 7*. smaller epitbelinl cells near the inner slope of the 

 organ of Corti ; fc, opening.^ through which the nerves pass ; i, inner hair cells ; 

 I, inner pillars ; m, their heads; o, outer pillars; ??, their heads; p, lamina 

 reticularis , q, a few mutilated outer hair cells; r, outer epithelium of the ductiis 

 cochlearis (Claudius's cells of the author's) ; removed at s in order to show the 

 points uf attaclimrnt of the outer hair cells. Afler Waldeyer, in Strieker's 

 " .Manual of Histology." 



