EMBRYOLOGY 





kk - 



Fig. 283. Part of a Motion through the cochlea of an embryo Cat 9 cm. long, after BOETTCHKK. 



XX . < > ;irtilaginous capsule, in which the cochlear duct describes ascending spiral turns ; dc, ductus 

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

 MA co.hlearis with ligamentum spirale ; Sl r , scala reatibuli ; AT, 6'7", scala tympani ; 

 y, gelatinous timue, which s'ill fills the scala vestibuli (*v') in its last turns ; y', remnant of 

 the gelatinotu tissue, which is not yet liquefied ; M, firm connective tissue surrounding the 

 co;hle ir nerve (nc) ; gtp, ganglion spirale ; ff, uarve wliich run3 to CoRTi's organ in the 

 future lamina spiralii osjea ; }', ompict connective-tissue layer, which bicomes ossified and 

 sh*re4 in bounding the bony cochleir duct ; P, psrichondri-iin. 



