172 THE VOYAGE OF H.M.S. CHALLENGER. 



Fig. 4. tr. Trapezius. 



c.d. Clavicular deltoid. 



c.h. Cephalo-humeral. 



p.m. Pectoralis major. 



b. Biceps. 



tr 2 . Outer head of triceps. 



b.a. Brachialis anticus (drawn backwards by a hook). 



tr 1 . Long or middle head of triceps. 



t.m 1 . Teres major. 



i.s. Infra-spinatus. 



s.s. Supra-spinatus. 



s.d. Scapular deltoid. 



ac. Acromion process. 



t.m 2 . Teres minor. 

 Fig. 5. Left fore limb of the male Thylacine. 



s.c. Subclavius. 



ac. Acromion process. 



s.s. Supra-spinatus. 



a.t. Acromio-trachelien. 



tr. Trapezius. 



i.s. Infra-spinatus. 



s.d. Scapular deltoid. 



t.m 1 . Teres major. 



tr 1 . Long or middle head of triceps. 



tr 2 . Outer head of triceps. 



d.e. Extensor secundi internodii pollicis. 



r.l. Extensor digitorum secundus. 



m.u. and cm. Extensor carpi ulnaris, split up into two distinct muscles. 



and. Posterior annular ligament. 



m.r. and c.r. Extensor ossis metacarpi pollicis, split up into two portions. 



c.d. Extensor communis digitorum. 



c.b. Extensor carpi radialis brevior. 



c.l. Extensor carpi radialis longior. 



s.l. Supinator longus. 



b.a. Brachialis anticus. 



b. Biceps. 



c. Circumflex nerve (cutaneous branch). 

 p.m. Pectoralis major. 



c.h. Cephalo-humeral. 



