564 



COMPARATIVE PHYSIOLOGY. 



Fio. 408.— Diagrammatic representation of ductus cochlearis and organs of Corti (after 

 Landois). Ny nerve of cochlea; A", inner, and P, outer, hair-cells'; n, nerve-fibrils 

 terminating in P; a, «, supporting cells; d, cells of sulcus spiralis; z, inner rod 

 of Corti; y, outer rod of Corti: m6, membrane of Corti (membrana tectoria); o, 

 membrana reticularis; H, if, cells of area toward outer wall. 



A.N. 



P.S.C. 



Coch. 



Pio. 410. 



Fio. 409. 



Fig. 409. — Auditory epithelium from macula acoustica of saccule of alligator, much 

 magnified (after Schfifer). c, c, columnar hair-cells; /,/, fiber cells; n, nerve-fiber 

 losmg its medullary sheath and about to terminate in columnar auditory cells; h, 

 auditory hair; h', base of auditory hairs split up into fibrils. 



Fig. 410. — Diagrammatic representation of distribution of auditory nerve in membra- 

 nous labyrinth and cochlea (after Huxley). 



