356 SHOULDER-GIRDLE IN MONOTREMES, 



44a. N. to M. triceps (scapular portion). 

 44b. (humeral portion). 



45. N. cutaneus medius (Westling). 



46. N. ulnaris. 



47. N. musculo-cutaneus. 



48. N. to M. biceps (both heads). 



49. N. to M. coraco-bi-achialis longus. 

 49a. N. to M. coraco-brachialis brevis. 



50. N. to M. epicoraco-brachialis. 



50a. Twig from M. musculo-cutaneus to M. epicoraco-brachialis (Oriii- 

 thor-hynchn^). 



51. Ventral cord from 4 Cv. et 5 Cv. to ventral cord from 6 Cv, et 7 Cv. 



52. Dorsal cord from. 4 Cv. et 5 Cv. to join 53 (dorsal cord from 6 Cv). 



54. Lateral cutaneous nerve of the thorax (= N. of Wrisberg ?) and formed 



by 55 from 7 Cv. and 58 from 8 Cv. et 1 D. et 2 D. 

 56 et 57. Principal divisions of 55, to supply abdominu-humeralpanniculus. 



Muscles. 



Ah. F. Fascia covering the abdominal muscles. 

 Be. i. Epicoracoid portion of M. biceps brachii. 

 Be. a. Coracoid ,,>>))>> 



Cb. B. M. Coraco-brachialis brevis. 



Cb. L. longus. 



Ce. M. costo coracoideus. 



D. D. G. M. dermo dorsi-cervicalis. 



D. Ej). M. dorso-epitrochlearis. 



Dlt. C. Clavicular portion of M. deltoideus. 



Dlt. Cx. Deep portion of the insertion of Bit. G. 



Dlt. S. Scapular portion of M. deltoideus. 



E.G.M. M. episterno-cleido-mastoideus. 



Ep. H. M. epicoraco-humeralis. 



Ex. 0. M. obliquus exteruus abdominis. 



/. S. M. infraspinatus. 



Lt. B.A. M. latissimus dorsi, anterior dorsal portion. 



Lt. D.P. posterior piirtion. 



Lt. S. scapular portion. 



Pn. M. panniculus carnosus. 



Pn. A. — abdominal portion. 



Pn. III. upper division of deep layer. 



Pri. D". deep 



Pn. D'l'. middle 



Pn. S. M. panniculus carnosus, superficial layer. 



Pn. S. E. external part of superficial layer, 



P7i. S. M. median part of superficial area. 



Pt. M. M. pectoralis major. 

 Pt. Q. M. pectoralis quartus. 



Pt. Q. i. — (deep part of iasertion). 



Py. M. pyramidalis. 

 Bet, M. rectus abdominis. 



Bet.' deep portion 



Rh. M. rhomboideus. 



S, L. M. sacrolumbalis. 



S. M. M. sterno-mastoideus 



