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Show 786 MR. ST. GEORGE MIVART ON THE [June 27, each digit, except the pollex, which has a large bundle of fibres inserted into the dorsal side of the ulnar border of its metacarpal I Palmar interossei also spring from the carpus, and are inserted one on each side of the proximal phalanx of each of the three middle digits. Another rather large fasciculus is inserted into tbe radial side of the fifth digit, and, no doubt, represents one or more of the spinal muscles of that digit. Finally, a considerable number of muscular fibres are inserted into the proximal phalanx of the pollex and into the palmar side of the ulnar border of its metacarpal. These fibres, no doubt, represent the flexor brevis and opponens poliicis of higher animals. Fig. 13. Right pelvic limb. Superficial muscles of the anterior surface of the thigh and of the flexor surface of the leg. E.L.B. Extensor longus digitorum. Ex. 0. External oblique. G. Gracilis. Go.E. Gastrocnemius externus. Go. I. Gastrocnemius internus. G.Mx. Gluteus maximus. Z 1 & 2 . Iliacus and psoas. S. Rectus abdominis R. F. Rectus femoris. T. A. Tibialis anticus. V. I. Vastus internus. |