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Show 1905.] ANATOMY OF THE LEATHERY TURTLE. 299 rest of the scapular portion of the testo-coracoicleus, although it seemed to be continuous with it. Pectoralis (text-figs. 57 & 58. 43).-Origin : from the plastron by a large anteriorly concave semilunar attachment, the middle (longest) arm of which extends from 13 cm. behind the anterior Text-fig. 58. 20. Coraco-hyoideus, 42. Testo-coracoideus, 43. l 'ectoralis, 44a . Supra-clavicularis, 44 6. Supra-coracoideus, 45. Coraco-brachialis brevis externus, 46. Coraco-bracliialis brevis interims, 47. Coraco-antebracliialis, 50 a & b. Deltoideus. 65. Humero-digiti I .-V . volaris. border of the plastron to 1 1 cm. behind its mid-transverse line. The muscle-fibres converge towards the shoulder. Insertion : by mixed tendon and muscle upon the lateral process of the humerus |