1867.] Mr. J. Wood on Variations in Human Myology. 531 



to that of the longior, and the other to the insertion of the brevior. In 

 another (No. 14) the longior was, in addition, provided with two tendons 

 by division. In two subjects (Nos. 30 & 31) the tendon of the 

 extensor carpi radialis Irevior was inserted into the inner corner of the 

 base of the second metacarpal bone as well as into the third. This was 

 the case also in two of those which were provided with an extensor 

 intermedins (Nos. 29 & 32). It is interesting as showing how an in- 

 termediate tendon and muscle may be formed by simple fission of the 

 brevior. 



17. Extensor cmpi ulnaris. — In two subjects (Nos. 7 & 21) this 

 muscle gave off a slip of its lower tendon to the extensor aponeurosis 

 of the little finger. In one (No. 11) the abductor minimi digiti arose 

 partly from the tendon, and was further provided with two other di- 

 stinct origins — one from the pisiform bone, and the other from the upper 

 border of the posterior annular ligament, evincing a tendency to the 

 high origin described and figured in the author's former papers, and 

 previously recorded by Griinther, Milde, and Scemmerring. 



18. Bwpinator longus. — In three out of the four varieties found in 

 this muscle, the tendon of insertion was double. In one (No 8, fig. 4, i) 

 the lower insertion was the larger and normal one at the base of the 

 radial styloid process, while the upper one was attached to the outer 

 border of the radius three inches above, the radial nerve passing between 

 them to the back of the hand. In No. 34 the same arrangement was 

 present in both arms. In another (No. 21) the radial nerve passed 

 higher than both tendons. In one subject (No. 28) the tendon was 

 divided into three portions, the lowest and largest being inserted into 

 the usual place, the upper one near the middle of the radius, and the 

 intermediate one opposite the upper border of the pronator quadratus. 

 The radial nerve passed between the two latter. 



19. Extensor communis digitorum. — In two subjects (Nos. 8 & 28) 

 the tendons of this muscle on the back of the hand were doubled ; in 

 the first for each digit, and in the last for the middle and ring- 

 fingers only. In one (No. 29) the tendon of the index only was 

 doubled, one being connected by a lateral slip with that of the middle 

 finger, as the latter was to that of the ring-finger, and this, — with that 

 of the little finger. It so resulted that all the tendons were thus joined 

 together, except one of the two tendons of the index. The indicator 

 was normal, but the extensor minimi digiti gave a tendon to the ring- 

 finger. By means of these special tendons, the individual play of each 

 finger was kept free. In one subject (No. 21) there was found, in the 

 left hand, a single fleshy slip of the muscle first described by the author 

 as the Extensor hrevis digitorum manus, arising from the dorsal surface 

 of the OS magnum and unciforme, and passing to the extensor aponeurosis 

 on the radial side of the middle digit. In another (No. 23) there were 

 found, in both hands, two slips passing from the same bones and from 



