766 



THE EAE. 



series of rods, and by narrow bodies with flattened extremities to the outer 

 series : at its outer margin it has not yet been demonstrated that it is 

 attached to the wall of the cochlea, although it has been supposed that its 

 function might be to give fixity to the rods of Corti. Besides the rods and 

 the lamina reticularis the organ of Corti presents various cellular elements. 

 Of these the most important are an outer and inner series of cells with stiff 



Fig. 523. 



A. 



Fig. 523 A. VIEW FROM ABOVE OP THE ORGAN OP CORTI AND LAMINA RETICULARIS IN 

 THE Ox (from Kolliker). ^ 



a, inner rods or fibres of Corti ; 6, inner ends of the same with the deeper attached 

 nuclei ; c, articulating part of the same ; d, clear plates appended, which with others 

 from the outer rods form the commencement of the membrana reticularis ; e, outer rods 

 or fibres of Covti ; /, their articulating portions ; g, their terminations at the membrana 

 basilaris ; h, plates of the outer rods belonging to the membrana reticularis ; i i, 

 apparent extension of the ends of the fibres of Corti in the stride of the zona pectinata of 

 the basilar membrane ; I, their inner connecting plates ; I', their outer connecting plates ; 

 m, %, o, first, second, and third series of perforations ; p, rectangular terminal part of 

 the lamina ; q, prolongation of this in the form of fibres upon the large epithelial cells of 

 the organ of Corti. 



Fig. 523 B. THE ORGAN OP CORTI OF THE CAT (from Kolliker). 5 -f 



1, the organ of Corti from above ; c, the articulated part of the inner fibres or rods ; 

 d, connected plates which form the commencement of the membrana reticularis ; f, 

 articulating portions of the outer rods ; /', one of these connected with a filamentous 

 process, and presenting granular or punctated contents ; ra, n, o, first, second, and third 

 row of perforations, in which the cilia of Corti's cells are represented as dark arched lines ; 

 a, inner ciliated cells with ($) their cilia, forming the outermost part of the thick 

 epithelium of the sulcus spiralis (7), and which covers the inner fibres (rods) of Corti as 

 far as their articulating pails ; 5, outer part of the network of the lamina reticularis ; 

 2, a cell of Corti with its hairs, but no visible filamentous appendage ; 3, lateral view of 

 the lamina reticularis with the bundles of cilia of the cells of Corti. 



