1905.] 



ANATOMY OF THE LEATHERY TURTLE. 



299 



rest of the scapular portion of the testo-coracoideus, although it 

 seemed to be continuous with it. 



Pectorcdis (text-figs. 57 & 58. 43).— Origin : from the plastron 

 by a large anteriorly concave semikuiar attachment, the middle 

 (longest) arm of which extends from 13 cm. behind the anterior 



Text-fio-. 58. 



Dermoclielys coriacea, muscles of the right shoulder, ventral aspect. 



20. Coraco-hj'oideus, 42. Testo-coracoideus, 43. Pectoralis, 44 a. Supra-clavicularis, 

 44 6. Supra-coracoideus, 45. Coraco-brachialis orevis externus, 46. Coraco- 

 brachialis brevis interims, 47. Coraco-antebrachialis, 50 a & 6. Deltoideus. 

 65. Humero-digiti I.-V. volaris. 



border of the plastron to 11 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 



