. The comparative anatomy of the domesticated animals. Veterinary anatomy. TEE AUDITORY APPARATUS. SO that its centre nearly corresponds to the inner wall of the tympanum. A partition—the lamina spiralis, spiral like the cavity—divides it into two distinct sections, or scales—a superior and inferior. This partition is attached by its inner border to the central axis of the cochlea, but is free at its external margin, whick does not quite reach the periphery of the cavity. The two scalse, therefore^ Fig. SECTION THROUGH ONE OF THE COILS OF THE COCHLEA. ST, Scala tympani; SV, scala vestibu
. The comparative anatomy of the domesticated animals. Veterinary anatomy. TEE AUDITORY APPARATUS. SO that its centre nearly corresponds to the inner wall of the tympanum. A partition—the lamina spiralis, spiral like the cavity—divides it into two distinct sections, or scales—a superior and inferior. This partition is attached by its inner border to the central axis of the cochlea, but is free at its external margin, whick does not quite reach the periphery of the cavity. The two scalse, therefore^ Fig. SECTION THROUGH ONE OF THE COILS OF THE COCHLEA. ST, Scala tympani; SV, scala vestibuli; CC, canalis cochleae; membrana of Reissner; lis to Isp, lamina spiralis membi-anacea; Us, limbus laminae spiralis; ss, sulcus spiralis; gs, ganglion spirale situated on nc, the nervous cochlearis indicated by the black line ; Iso, lamina spiralis ossea ; t, mem- brana tectoria; 6, membrana basilaris ; Co, organ of Corti; Isp, ligamentum spirale; Cc, cells of Claudius. 1, Rod of Coiti of the first order ; 2, rod of Corti of the second order. communicate, in the skeleton, by means of an opening (the helico-trema) that follows the free border of the lamina spiralis throughout its extent. The inferior scala (or scala vestibuli) enters the vestibule; the commencement of the superior scale, or scala tympani, is formed by the fenestra rotunda {fenestra cochleae), which brings it into communication with the middle ear, without the presence of a membrane ex- actly closing that aperture. Fig. 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 Chauveau, A. (Auguste), 1827-1917; Arloing, S. (Saturnin), 1846-1911; Fleming, George, 1833-1901. New York, D. Appleton
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