ORGAN OF CORTI. 



165 



that have been made. The first row of the external rings 

 begins close to the outer ends of the capitular laminae of the 

 internal pillars ; externally, each phalanx of the second row 

 forms the boundary to each side of the phalangiform terminal 

 piece of the external capitular laminse (fig. 326, k,fi, I, ri). The 



Fig. 329. 



Fig. 329. Fragment of the lamina reticularis of a new-born child, 

 seen in profile, and magnified 800 diameters, a, Internal, 6, exter- 

 nal pillar ; c, capitular lamina of the internal pillar ending in front 

 of the first brush of hairs, f l ; d, capitular lamina of the external 

 pillar, with its phalangiform appendage ; /, hairs of the internal 

 hair cells, the hair cells themselves not preserved ; f { / 5 , five 

 brushes of hair from the external hair cells projecting through the 

 annuli of the lamina reticularis (in surface views only four rows 

 of brushes of hairs can with certainty be counted, here and there 

 a fifth row may be discovered, appearing as though it had been 

 displaced forward) ; ej e 4 , phalanges ; g^ 5 , external hair cells, 

 mutilated, but still adhering to the lamina reticularis ; h, supporting 

 cells (Hensen). 



terminal portion of the external capitular lamina also partici- 

 pates in completing the circumference of the annuli of the 

 second row. In regard to the completion of the third ring, it 

 need only be remarked that externally the completely de- 



include the capitular laminae of the pillars as well as the terminal frames ; 

 otherwise it could only be said in regard to the annuli of the third row 

 in Man, that they are surrounded on all sides by phalanges. 



