VIEW OF THEIR ANATOMY AND DEVELOPMENT. 135 



Fig. 320. 



Fig 320. Section of the cochlea in a human embryo of four months, 

 magnified thirty diameters, a a a, Cartilaginous capsule of the 

 cochlea ; 66, perichondrium ; c, mucous-tissue matrix of the modiolus ; 

 dd, cartilaginous septa of the several turns of the cochlea ; e 4 , 

 sections of the ductus cochlearis ; //,, membrane of Reissner ; g, meni- 

 brana tectoria, slightly separated from the subjacent tissue ; A, rudi- 

 ment of stria vascularis ; i, rudiment of the later appearing organ of 



