Kelly — On a Case of Polydactylism. 645 



"by a very large siiperficialis Yoloe, wMch. lay superficial to the muscles 

 of the thenar eminence. The arch sent a branch to the inner side 

 of the little finger ; one, before mentioned, to the outer side of the 

 second poUex ; and branches to the clefts between all the digits except 

 to that between second and thii"d pollices, which received a transverse 

 branch which subdivided, from that between the thiixl pollex and the 

 index finger. The radial side of first pollex got a branch from the 

 radial artery, while in the intertendinous space ; while the other side 

 received a branch from the superficialas volae. 



The radial artery wound round the wrist, passing under a distinct 

 tendinous arch to the back of the hand, whence it passed forward be- 

 tween the second and third metacarpal bones. It distributed its 

 usual branches, and certain others which might be termed dorsalis 

 pollicis primi, d. p. secundi, and d. p. tertii. The deep palmar arch 

 "was small. This description suits the left radial artery also. 



Left Hand : — The ulnar artery, as in the right, crossed to the 

 radial side of pollex two. It was completed by a similarly placed super- 

 ficialis volte, which, however, was much smaller than the right, and 

 gave off an equal number of branches, which were similarly distributed, 

 except that the digital artery between pollex two and three was given 

 off from the outer of the two branches supplying the compound digit. 

 A remarkable branch, larger than either the radial or ulnar artery, 

 passed under the annular ligament, with the median nerve, and joined 

 the superficial palmar arch. Apparently, tliis was a very large arteria 

 mediana from the interosseous artery. 



The jS'erves, Eight Hand : — The ulnar : the superficial portion 

 normal, the deep branch supplying all the short muscles, except the 

 abductor and opponens pollicis. 



The median nerve : — The inner division supplied the middle finger 

 and the contiguous sides of the index and ring. It received no com- 

 municating branch from the ulnar. The external division supplied 

 the radial side of the index finger, both sides of second and third polUces, 

 and the ulnar side of first pollex. The radial side was supplied by a 

 branch from the radial nerve which came from the back of the wrist. 

 A distinct branch ramified between the second and third pollex, but 

 the vascular supply was only collateral. On the posterior surface of 

 the hand the posterior branch of the ulnar supplied two and a-half 

 fingers ; the remainder received branches from the radial nerve. 



The Left Hand : — The same description is applicable to the nerves 

 of this member, with a few trivial exceptions. The ulnar sent a com- 

 municating branch to the median, and the latter nerve, in addition to 

 supplying, as in the right hand, the opponens and abductor pollicis, 

 also sent filaments to the superficial portions of the flexor brevis 

 pollicis. 



The Foot : — The left foot, having but three distinct digits, was a 

 specimen of double syndactylism, as well as of talipes valgus. The 

 anatomy of this member presented few peculiarities. The normal 



