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Show 1881.] ANATOMY OF THE EPOMOPHORI. 687 third of the neck ; and the wide space intervening between the epiglottis and the base of the tongue is seen, on removal of the integument, to be covered in by the mucous membrane of the pharynx only. The mylo-hyoid muscle arises on each side from the thyrohyoid bone between the insertion of the sterno-hyoid musele and the origin of the middle constrictor of the pharynx, and, suddenly narrowing, forms a half-round fleshy tendon, which passes forwards across the projecting articular extremity of the epihyal bone (fig. 1, x), which acts as a pulley, and on reaching the under Fig. 2. Fig. 3. Fig. 2. Hyoid bones and larynx of Epomophorus franqueti (enlarged), viewed from above, ep.hy, epihyal bone; cer.hy, ceratohyal bones; th.hy, extremity of thyrohyal bone; e, epiglottis, posterior surface; s, San-torinian cartilages. Fig. 3. Side view of part of the hyoid bones and the larynx of Epomophorus franqueti (enlarged), showing (ph. s) part of the neck of the posterior pharyngeal sac and its communication with the pharynx; x, the prominent articular extremity of the epihyal bone; st.hy, stylo-hyoid muscle; my.hy, mylo-hyoid, and hy.gl, hyo-glossus muscles, divided and drawn backwards; th.hy, thyrohyal bone. surface of the tongue spreads out, uniting with its fellow of the opposite side to form a thin muscular expansion extending between the rami of the mandible almost as far forwards as the symphysis menti. Immediately external to the origin of the mylo-hyoid the hyo-glossus arises by a much narrower origin, and, forming a perfectly similar tendon, accompanies it forwards, but separated from it by the projecting articular extremity of the epihyal bone, and, curvin°* inwards above it, is inserted into the side of the tongue. The genio-hyoid and genio-hyo-glossus muscles are absent, the basi- |