1865.] Mr. J. Wood Varieties in Human Myology. 381 



In the axilla, on both sides, the latissimus dorsi sent a muscular slip 

 three-fourths of an inch wide, in front of the vessels and nerves, to be in- 

 serted, with the upper sternal fibres of the pectoralis major, into the 

 outer bicipital ridge of the humerus (fig. 1 c). A similar detached slip 

 arose from the seventh rib, close below the pectoralis major, and was inserted 

 separately into the bicipital ridge a little higher than the foregoing 

 (fig. 1 b). 



From the outer border of the first rib, near the cartilage, arose a thin, 

 fleshy, triangular muscle which, widening gradually, dropped fibres of in- 

 sertion into the second, third, and fourth ribs, close outside the origin of 

 the pectoralis minor. It was entirely distinct from the intercostals, and 

 may be termed a supra- costal muscle. It existed on both sides, but was 

 more marked on the left (fig. 1 rf). 



In the upper arm was a well-marked brachio-fascialis, exactly similar 

 to that described in the last paper, arising with the upper fibres of the 

 brachialis anticus, and inserted into the semilunar fascia of the elbow, 

 intervening between the brachial artery and median nerve close above the 

 bend of the elbow. 



In the right arm only was a large fusiform muscle, arising, by a thin 

 lunated aponeurotic tendon, from the oblique line of the radius under the 

 origin of the flexor sublimis, and inserted by a narrow spreading tendon 

 into the deep surface of the anterior annular ligament close to the tra- 

 pezium. 



Some of the fibres could be traced into the middle portion of the palmar 

 fascia. 



This muscle was also found in another muscular male, associated, as in 

 this case, with a remarkably developed extensor brevis digitorum manus. 

 It seems to be a homologue of the tensor fascia plant aris given in the 

 series of drawings accompanying the last paper. 



A strong and distinct palmaris longus and brevis were also present. 

 There was increased differentiation of the flexor sublimis digitorum. 



The flexor pollicis longus gave a strong muscular slip to the indicial 

 portion of the flexor profundus digitorum. 



The third lumbricalis was double, half going to the third and half to 

 the fourth digit, and implanted in the usual manner into their opposed 

 sides. This was also seen in another subject. 



There was an extensor proprius digiti medii from the lower end of the 

 back of the ulna and interosseous ligament, distinct from the indicator 

 muscle, and inserted into the dorsal expansion of the common extensor 

 tendon, lying on its deep surface and sending lateral slips to the metacarpo- 

 phalangeal ligaments. 



The extensor ossis metacarpi pollicis, on both sides, had three distinct 

 tendons, one to join the abductor pollicis, another to the front of the tra- 

 pezium, and the third, the largest, to the base of the metacarpal bone. 

 This is a common arrangement. 



