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Show b. Pars scapi do - hut aer alts (text-figs. 58, 59, & 64. 50 l>).- Origin : from the whole anterior surface of the scapula. Insertion : by a round tendon to the proximal parts of the processus lateralis humeri-in a position on the flexor surface of the humerus exactly opposite that occupied by the insertion of the pars claviculo-plastro-humeralis on the extensor surface. 1905.] ANATOMY OF THE LEATHERY TURTLE. 303 Text-fig. 62. 46 a. (see text), 49. Testo-hmneralis dorsi, 50 a. Deltoideus (clavicular part), 52. Sub-scapularis, 52 a. (see text), 53. Anconseus, 56. Humero-carpali-metacar-palis I., 59. Ulna-carpo-ulnaris, 60, 61. Ulna-carpo-radialis + carpali digiti I .-V . dors., 63. Humero-carpali-ulnaris, 65. Humero-digiti I .-V . volaris, X ulna-carpalis, Y intrinsic hand-muscles. Fiirbringer mentions that in Chelone and Sphargis these two parts are more independent than usual, but states that both are inserted upon the processus lateralis humeri. The two parts together form a very large mass of muscle. P r o c , Z o o l . S o c .-1905, V o l . I. No. XX. 20 |