250 Prof. J. G. Gallon o)i the Myology 



ends at tlie humerus beneath the middle portion of the terminal 

 tendon of the pectoralis major. 



The dorso-epitrochlien, instead of being a continuation of 

 the latissimus dorsi, appears rather to be tacked on to its outer 

 edge by a kind of faint tendinous seam. This otFset passes as 

 a thin, but quite distinct, muscular investment over the ole- 

 cranon, along the flexor aspect of the forearm, and terminates 

 in the palmar fascia. 



. Over the dorso-epitrochlien passes the internal cutaneous 

 nerve, which runs over the flexor surface of the forearm as far 

 as the wrist. 



The pectoralis major had no clavicular origin. At the upper- 

 most portion of its sternal origin it can be divided into two 

 more or less distinct strata, with the inferior (deep) surface of 

 the lowest of which the ]Danniculus carnosus is connected. 

 The upper stratum of the muscle joins the lowest portion of the 

 terminal tendon, the lower the uppermost — enclosing thus a 

 sac having the concavity upwards. 



The tendon is inserted along the ridge running from the 

 external tuberosity to the deltoid trochanter. 



A layer of connective tissue, but no fascia, intervenes be- 

 tAveen the two layers into which the muscle may be difteren- 

 tiated. 



The pectoralis minor is absent, unless the lowermost of the 

 two layers of the pectoralis major just mentioned be regarded 

 as its homologue. 



Of the coraco-brachialis I could not find a trace on either 

 side, not even of the " short " variety of Wood. This muscle, 

 which is usually present, in one of its three forms at least, in 

 mammals, is wanting also in the Chlamydophore, according to 

 Prof. Hyrtl. 



The biceps was single-headed. Halfway down the arm its 

 most posterior fibres separate, and fuse with the brachialis 

 anticus, while the anterior portion of tlie muscle is continued 

 into a stout rounded tendon, which is inserted into a strong 

 tubercle projecting from the palmar surface of the radius. 

 This part of the muscle must act as a strong supinator. Tliat 

 portion of the biceps which is blended with the bracliialis an- 

 ticus is inserted in company with this muscle into the idna. 



The biceps arises by a flat tendon from the su})erior edge of 

 the glenoid cavity of the scapula, and passes over the liead of 

 the humerus, covered by the capsular ligament. 



The brachialis anticus takes origin from the anterior and 

 external aspect of the humerus, below the deltoid tuberosity. 

 • The tricc]is is made up of the usual factors. The " long 

 head" of anthropotomy takes origin from tlic upper fourth 



