234 



Mr. J. Wood on Valuations in Human Myology. [June 21, 



gards these as imperfect developments of the so-called dorsi-epitrochlear 

 muscle of the lower animals. None have been found this session extensively 

 developed, and these only in three subjects, of which the last (No. 32) 

 was one remarkable for the number of its muscular abnormalities. 



The other varieties found were two specimens of the remarkable 

 offset sent from the latissimus upwards towards the coracoid process, 

 which the author described in his paper read two years ago to the 

 Society, under the name of the chondro-coracoid muscle. It arises with 

 the upper costal fibres of the latissimus from the ninth and tenth rib-carti- 

 lages, ascending so as to cross the axillary cavity obliquely outwards. In 

 the specimen figured in the author's first series it was inserted with the 

 pectoralis minor into the tip of the coracoid process. In subject 10 (fig. 2) 

 it is inserted partly into the lower surface of that process («), and partly 

 into the capsular ligament of the shoulder with the tendon of the sujpra- 

 spinatus (b). It will be observed to pass between the trunks of the axillary 

 plexus, separating the posterior from the lateral cords. The latter and the 

 vessels are cut to show the muscle. In subject 28 this muscle was con- 

 nected with the origin of the coraco-hrachialis, and passed with it to the 

 tip of the coracoid. A similar slip of muscle, passing from the 5th, 6th, 

 and 7th ribs to the muscles connected with the coracoid process, was ob- 

 served by Theile {Jourdans Translation, p. 204). In all the specimens 

 the unvarying origin of this curious slip, and its relation to the one 

 which joins with the insertion of the pectoralis major, and to the chondro- 

 epitrochlear muscle of the lower animals, show it to be the result of an 

 upward displacement of the same typical structure, ranging from the in- 

 sertion of the pectoralis major to that of the pectoralis minor. 



8. The increased number of the heads of the biceps in the two subjects 

 in this column were of the more usual kind described by Meckel and others, 

 arising from the fibres of the brachialis anticus and from the greater tu- 

 berosity of the humerus. 



9. In subjects 14 and 17 the brachialis anticus presented a continuity 

 of a large portion of its outer fibres of origin into those of the supinator 

 longusy which is not uncommon, although not, as far as the author is aware, 

 previously noted in the human subject. It is a very common arrangement 

 in the Apes and Monkeys, assisting them very materially in climbing and 

 twisting the body while hanging by the anterior extremities. In subject 

 30 there was a hrachio-fascialis or quasi-third head of the biceps, similar 

 to that described in former papers. On the opposite arm was found a 

 curious fusiform muscle, springing high up from the brachialis anticus, and 

 connected below with the pronator radii teres towards its insertion. 



10. The jlexor sublimis digitorum in subjects 5 and 13 gave off on th( 

 outer side of its coronoid origin a separate slender tendon, which becam 

 the sole origin of a first lumbricalis muscle. In both, another first lum 

 bricalis was given off from the usual place on the indicial tendon of th 

 perforans. In No. 13 also a curious division of the abnormal lumbricah 



