. The anatomy of the domestic animals. Veterinary anatomy. Fig. 707.—Le Membranous Labyrinth (En- larged). 1, Cochlea; 2, fenestra vestibuli; 5, fenestra coch- lese; 4. ductus endolymphaticus; 5, dorsal, G, lateral, 7, ventral, duct. (After EUenberger, in Leisering's At- las.). Fig. 70S.—Schematic Sectional View of Labyrinth (Enlarged). ?, 5, 5, Dorsal, lateral, and ventral ducts; 4t utricle; 5, saccule; 6, cochlea; 7, acoustic nerve. (.4fter EUenberger, in Leisering's Atlas.) to the outer wall of the cochlea. The tympanic wall or floor intervenes between the cochlear duct and the scala tympan
. The anatomy of the domestic animals. Veterinary anatomy. Fig. 707.—Le Membranous Labyrinth (En- larged). 1, Cochlea; 2, fenestra vestibuli; 5, fenestra coch- lese; 4. ductus endolymphaticus; 5, dorsal, G, lateral, 7, ventral, duct. (After EUenberger, in Leisering's At- las.). Fig. 70S.—Schematic Sectional View of Labyrinth (Enlarged). ?, 5, 5, Dorsal, lateral, and ventral ducts; 4t utricle; 5, saccule; 6, cochlea; 7, acoustic nerve. (.4fter EUenberger, in Leisering's Atlas.) to the outer wall of the cochlea. The tympanic wall or floor intervenes between the cochlear duct and the scala tympani; it is formed by the periosteum of the mar- ginal part of the lamina spiralis and the membrana basilaris, which stretches be- tween the free edge of the lamina and the outer wall of the cochlea. The outer wall consists of th(> filjrous lining of the cochlea, which is greatly thickened to form the ligamentum spirale cochleae. —The membranous labyrinth consists in general of an outer thin fibrous la>'er, a middle transparent tunic, and an internal epithelium, composed of flattened cells. But in certain situations special and remarkable structures occur, among which are the following: (1) The maculae acousticae appear as small whitish thickenings of the imicr walls of the saccule and utricle. The epithelium here consists of two kintls of cells, viz., supporting cells and hair cells. The latter are flask-shaped and are surrounded by the fusiform supporting cells. The free end of each hair cell bears a stiff, hair-like process composed of a bundle of cilia. Fibers of the saccular and utricular branches of the vestibular nerve form arborizations about the basal parts of the hair cells. Adherent to the surface of the maculse ' Ako termed tlie membranous semicircular canals. " For the finer structure reference is to be made to the histological Please note that these images are extracted from scanned page images that may have been digitally enh
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