504 



EMBRYOLOGY 



de 



Fi. 283. Part of a section through the cochlea of an embryo Cat 9 cm. long, after BOETTCHER. 



kk* Cartilaginous capsule, in which the cochlear duct describes asremling spiral turns ; dc, ductus 

 cochlearis ; C, organ of CORTI ; Iv, lamina vestibularis ; x, outer wall of the membranous 

 ductus coehle'aris with ligamentum spiiale ; SV, scala vestibuli ; ST, ST, scala tympaiii ; 



g, gelatinous tissue, which still fills the scala vestibi 

 the gelatinous tissue, which is not yet Liquefied ; M, 

 cochlear nerve (nc) ; gsp, ganglion spirale ; N, uerv 

 future lamina spiralis ossea ; Y, compact connective 

 shares in bounding the bouy cochlear duct ; P, perit 



in its last turns ; g', remnant of 

 rm connective tissue surrounding the 

 which runs to CornVS organ in the 

 .ssue layer, which becomes ossified and 

 mdrium. 



