REPORT ON THE MARSUPIALIA. 175 



Fig. 4. m.n. Median nerve. 



c.b.l. Coraco-brachialis lonffus. 



a.i. Ancoueous internus. 



h. Humerus. 



s.f. Supra-condyloid foramen, with the median nerve and humeral artery passing 

 through it. 



tr*. Inner head of the triceps. 



i.c.n. Internal cutaneous nerve. 



d.e.n. Nerve to dorsi-epitrochear muscle. 



ii.li. Ulnar nerve. 



d.e. Dorsi-epi trochlear muscle. 



t.m. Teres major. 



p.c.n. Nerve to panniculus carnosus. 



s.s. Su bscapularis muscle. 



b.p. Brachial plexus. 



c.r.n. External respiratory nerve. 



x. Scalenus medius. 



l.d. Latissimus dorsi. 



s.m. Serratus magnus. 



o.e. External oblique muscle. 

 Fig. 5. Extensor aspect of the left forearm of the Case us. 



c.d. Extensor communis digitorum. 



r.l. Extensor digitorum secundus. 



c.u. Extensor carpi ulnaris. 



a.e. Anconeous externus. 



e.p. Extensor secundi internodii j^ollicis. 



e.p 1 . and e.p 2 . The two heads of origin of the extensor secundi internodii pollicis. 



e.m. Extensor medii. 



m.r. and c.r. Extensor ossis metacarpi pollicis. 



c.b. Extensor carpi radialis brevior. 



c.b\\ 



c.b 2 . > Its three heads of origin. 



c.b\) 



c.I. Extensor carpi radialis longior. 



s.l. Supinator longus. 



m.s.n. Musculo-spiral nerve. 

 Fig. 6. Diagram of the brachial plexus of nerves in the Cttscus. 



C.V. to C.VIII. The anterior primary divisions of the posterior four cervical 

 spinal nerves. 



