. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates. Fit;. 222.—BONY COCHLEA OF MAN. (After A. Ecker.) A, axis; H, Immulus ; Lso, Lso1, lamina spiralis ossea, the free edge of which, perforated by the fibres of the auditory nerve, is visible at f. FIG. 223.—DIAGRAMMATIC TRANSVERSE SECTION OF THE COCHLEA OF A MAMMAL. B, membrana basilaris, on which the neuro-epithelium lies ; C, membrane of Corti; XS, bony cochlea ; L, limbus lamina? spiralis ; Lo, Lo1, the two layers of the lamina spiralis ossea, between which at N the auditory nerve (together with the ganglion, left of L)
. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates. Fit;. 222.—BONY COCHLEA OF MAN. (After A. Ecker.) A, axis; H, Immulus ; Lso, Lso1, lamina spiralis ossea, the free edge of which, perforated by the fibres of the auditory nerve, is visible at f. FIG. 223.—DIAGRAMMATIC TRANSVERSE SECTION OF THE COCHLEA OF A MAMMAL. B, membrana basilaris, on which the neuro-epithelium lies ; C, membrane of Corti; XS, bony cochlea ; L, limbus lamina? spiralis ; Lo, Lo1, the two layers of the lamina spiralis ossea, between which at N the auditory nerve (together with the ganglion, left of L) is seen ; Ls, liganientum spirale ; K, Reissner's membrane; Sm, scala media (membranous cochlea) ; St, scala tympani ; Sv, scala vestibula. spending to those already met with in the auditory organ of Birds and known as the scala ^estibuli and scala tympani (Figs. 215 and 223). Both of these are continuous with the perilymphatic space, and, following the direction of the scala media, open into one another at the blind end of the latter. The scala vestibuli is shut off from the tympanic cavity by the membrane of the fenestra vestibuli, to which the stapes is applied externally; the scala tym- pani is closed by the membrane of the fenestra cochlea?. On the floor of the bony cochlea, not far from the fenestra cochlea?, is an opening leading into a narrow ductus perilymphaticus or agueductus cochlea? (Fig. 215). The fibres of the auditory nerve running along the axis of the bony cochlea extend in their course laterally outwards, between. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Wiedersheim, Robert, 1848-1923; Parker, W. N. (William Newton), d. 1923. London, Macmillan and co. , limited
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