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Show ulna-carpo-ulnaris. Insertion: upon the proximal edge of the pisiform, extending onto its flexor and extensor surfaces. Humero-digitil.-Y.volaris(text-figs. 62 & 64. 65).-Origin: from nearly the whole length of the ulnar edge of the humerus, passing at the proximal end somewhat onto the flexor surface alongside the median nerve. Insertion : partly into the dense fib r o u s tissue that covers the flexor surface of the wrist, and partly (by its ulnar side) into the deep flexor, contributing to form the tendons for digits III. & IV. Text-fig. 64. 3 0 6 MK. R. II. BURNE ON THE [Api'. 1 8 , Dermochelys coriacea, right fore limb, flexor surface. 45. Coraco-brachialis brevis externus, 46. Coraco-brachialis brevis internus, 47. Coraco-antebrachialis, 48. Humero-antebrachialis inferior, 50 b. Deltoideus (scapular part), 52 a. (see text), 55. Humero-radialis longus dorsalis, 62. Humero-radialis volaris, 63. Humero-carpali-ulnaris, 65. Humero-digiti I .-Y . volaris, 67. Flexor digitorum profundus, Y intrinsic hand-rauscles. The distal part of this muscle is represented by an independent short flexor sublimis. Origin : from the dense fibrous tissue that |