. The anatomy of the domestic animals. Veterinary anatomy. FiG. 704.—Auditory Ossicles and Membrana Tympani; Medial View, Enlarged. 1, Annulus tympanicus; S, membrana tym- pani: 3, malleus: 4. incus; o, stapes. (After EUenberger, in Leisering's Atlas.) Fig. 705.—Right .Auditory Ossicles, Enlarged as In- dicated BY Lines Giving thmr Actual Length. a. Malleus: 1, Iiead; :S, neck; 5, handle; 4, long proc- ess; 5, muscular process, b. Incus: /, body; ^, short branch: 3, long branch; c, os lenticulare. c. Stapes: 1, head; ^, cms; ;5, base; 4, attachment of stapedius. (After EUenberger, in Leisering
. The anatomy of the domestic animals. Veterinary anatomy. FiG. 704.—Auditory Ossicles and Membrana Tympani; Medial View, Enlarged. 1, Annulus tympanicus; S, membrana tym- pani: 3, malleus: 4. incus; o, stapes. (After EUenberger, in Leisering's Atlas.) Fig. 705.—Right .Auditory Ossicles, Enlarged as In- dicated BY Lines Giving thmr Actual Length. a. Malleus: 1, Iiead; :S, neck; 5, handle; 4, long proc- ess; 5, muscular process, b. Incus: /, body; ^, short branch: 3, long branch; c, os lenticulare. c. Stapes: 1, head; ^, cms; ;5, base; 4, attachment of stapedius. (After EUenberger, in Leisering's Atlas.) tympanic recess. It is smooth and convex above and in front, and presents on its postero-medial aspect a concave facet for articulation with the body of the incus. The neck (CoUum mallei) is the constricted part below the head; its medial surface is crossed by the chorda tympani nerve. The handle (Manubrium mallei) is directed do%vnward, inward, and a little forwartl from the neck, and is attached along its entire length to the membrana tympani. On its medial surface, near the upper end, there is a slight projection to which the tendon of the tensor t>nnpani muscle is attached. The long process (Processus longus) is a pointed spicule which projects forward from the neck towaril the petro-tympanic fissure. The short process (Processus brevis) is a slight projection of the lateral side of the neck, and is attached to the upper part of the membrana tympani. The incus or anvil is situated chiefly in the epitympanic recess. It may be said to resemble in miniature a human bicuspid tooth with two divergent roots, and consists of a body and two processes. The body (Corpus incudis) articulates with the head of the hammer. The long process (Crus longum) projects downward from the botly and then curves inwartl; its extremity has attached to it a small nodule of bone, the os lenticulare, which articulates with the head of the stapes. The short process (Crus breve) project
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