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Show 466 ON THE MYOLOGY OF MENOBRANCHUS LATERALIS. [June 24, and fibula. It is inserted into the tarsus aud lower part of the tibia on the inner side of the leg. The inner portion (T. A. 1) is much like the extensor hallucis of Menopoma as to its origin, but it does not appear to descend below the shaft of the tibia. Peroneus (fig. 9, P). There is a muscle descending down the outer side of the leg, from the head of the fibula to the tarsus, as in Menopoma. The extensor longus digitorum (figs. 9 & 10, E.L.D) is a large sheet of muscle covering the front of the leg. It arises by a strong aponeurosis from the front of the distal end of the femur. Passing downwards, it goes to the digits. Extensor hallucis (?) (fig. 10, E. H). A small muscle which I thus name, with doubt and hesitation, takes origin from the lower part of the fibula, and, crossing the limb obliquely, passes to the dorsum of the hallux. Except that this muscle appears only to go to the innermost digit, it has very much the appearance of an extensor brevis digitorum. Extensor brevis digitorum. This muscle seems to be entirely wanting, unless what I have doubtfully named extensor hallucis be really the extensor brevis. Fig. 12. JTJr j __ ^ S.T I.I>. Deepest, muscles of ventral or flexor surface of right pelvic limb, the flexor digitorum being cut and reflected. F. I). Flexor digitorum. F. H. Flexor hallucis. G. Gracilis. S. T. Semitendinosus. X. Tibialis posticus ? Flexor digitorum (figs. 8, 11, & 12, F.D). Subtriangular in shape, this muscle takes origin from the posterior surface of the peroneal condyle of the femur; thence expanding as it descends, it goes to the digits. Flexor hallucis (figs. 8 & 12, F. II). Beneath the muscle last described is a muscle which arises from the posterior surface of the fibula and goes mainly, if not entirely, to the most tibial digit. On the peroneal border of th:s muscle, between it and the flexor digitorum, a delicate bundle of muscular fibres passes downwards (fig. 12, X) to the carpus. It is entirely hidden by the flexor digitorum, so as to be only visible on the removal or reflection of the latter. Is this delicate muscle the representative of the tibialis posticus ? |
