518 Mr. J. Wood on Variations in Human Myology, [June 18, 



a female (No. 31) the slip was, on the contrary, unusually large. In the 

 right foot of another (No. 27) it received a considerable shp from the 

 flexor accessoriusy as well as from the common flexor. In a third (No. 29) 

 it supplied the whole of the perforating tendon to the second toe, after 

 receiving only a very small slip of fibres from the common flexor. 



46. Extensor primi internodii hallucis longus. — In all the 18 males ex- 

 cept two, and in 13 out of the 18 females, the base of the first phalanx of 

 the great toe was the point of insertion of a more or less considerable slip 

 of tendon, described by the author in former papers under the above name. 

 In all except three it existed in both feet, in two in the right foot, and 

 in one in the left only, exhibiting an unusual uniformity in this respect. 



In 3 males (Nos. 5, 7 & 11) the tendon was derived from that of the tibi- 

 nlis anticusy leaving it a little above the ankle. 



This curious parallel to the peroneus quinfi on the outside of the foot, 

 had been previously found by the author in five other male subjects — in 

 four in both feet, and in one in the right only. The frequency of its 

 occurrence is in about 8 per cent, of subjects, although this variety seems 

 to have escaped the observation of anatomists. In the male (No. 15) the 

 tendon existed in the right foot only, as a well-defined and strong fibrous 

 band connected with the anterior ligament of the ankle-joint, with a distinct 

 insertion into the first phalanx of the great toe. It was totally unconnected 

 with any other tendon. This instance presents a curious parallel to the like 

 occasional abortive development of the homologous tendon in the hand, viz. 

 the extensor primi internodii poUicis, which has been described in these 

 pages as having been found, in two instances, connected solely with the 

 styloid process of the radius, close to the posterior ligament of the carpus. 



In all the rest of the subjects in which this tendon was found, it was an 

 ofl'set of that of the extensor proprius hallucis, and was inserted either 

 singly into the middle of the dorsal border of the base of the first phalanx, 

 or joined with the innermost tendon of the extensor brevis digitorum in 

 the same insertion. Sometimes it was connected separately with the lower 

 muscular fibres of the proprius, which showed, by a disposition to separate 

 from the rest, a tendency to form a separate muscle, such as that described 

 by the author in his former papers, and recorded by Meckel (Archiv, Bd. v. 

 S. 117), and mentioned by Theile and Henle (Muskellehre, S. 277). The 

 slip of tendon from the extensor proprius is recorded by Soemmerring {op, 

 cit. p. 323) and by Walther (in Haller's Disp. Anat. Select, vol. vi, p. 559). 



47. Extensor longus digitorum pedis. — In No. 1, male, this muscle 

 divided into four separate bellies, one to each tendon. The outermost was 

 joined by two slips from that of the peroneus tertius, which was split into 

 three parts. In the left leg of the male (No. 6) a tendon of reinforcement 

 was given off in the opposite way, viz. from the outermost of the extensor 

 longus to the middle of the upper border of the fifth metatarsal bone. In 

 the right leg of the female (No. 35) the same abnormality occurred in the 

 shape of two tendons to the fifth metatarsal. 



