1867.] Mr. J. Wood on Variations in Human Myology. 535 



head of the triceps, and became inserted into the neck of the humerus at 

 the same place as the capsidar ligament, overlapped a little by the tendon 

 of the latissimus dorsi. This muscle has been found by Haughtou in the 

 Maccicus nemestrinus and other Quadrumana, and by Macalister in the 

 Horse, Seal, and other Mammalia. In No. 2 J* was found a Transversus 

 onanuSj entirely separate from the bulk of the fibres of the abductor 

 pollicis, and arising chiefly from the neck of the third metacarpal bone 

 and transverse ligament. 



The remaining ten columns in the Table are occupied by abnorma- 

 lities of the lower extremity, affecting 23 muscles, and comprising 106 

 instances, \iz. 74 in the 22 males, and 32 in the 12 females. 



25. Peroneiis tertius. — This muscle presented varieties in no less 

 than 14 subjects. In no less than five it vras absent ; in three, on botli 

 sides, viz. two males (Kos. 24 & 28) and one female (No. 16). In two 

 other females (Nos. 10 & 24) it was totally absent on one side onty, 

 in one in the right, and in the other in the left leg, the representative 

 in the other leg being in each case so small as to be of little account. 

 In one, indeed, it was a mere slender band of fibrous tissue attached to 

 the lower fibres of the extensor communis digitoriim. It may be said, 

 then, that in one-fourth of the 12 female subjects it was wanting, and 

 in two only out of the 22 males. In two males (Nos. 20 & 27) its tendon 

 was doubled. In two other males (Nos. 30 & 32) its tendon was in- 

 serted into the base of the fourth as well as the fifth metatarsal bone. 

 In four (Nos. 3, 8, 11, & 29) it sent forward a slip to join the extensor 

 aponeurosis of the little toe, in the way oi the ]jeroneus q^idnti from the 

 hrevis. In all these four, except on the right leg of No. 8, the true ^;<5- 

 roneiis quinti from the brevis was coexistent. Eoth these varieties have 

 been well known to anatomists since Meckel. In one (No. 7) the slip 

 was lost on the fascia covering the last dorsal interosseus, and did not 

 reach the toe. 



26. JPeronev.s qicinti. — In 12 subjects (or one-third of the whole) was 

 found a representative tendon of this animal muscle more or less com- 

 plete, connected with the tendon of the peroneus hrevis, and leaving it 

 just below the malleolus. In three (Nos. 2, 16, & 26) the slip was at- 

 tached to the front end of the fifth metatarsal bone, and more or less 

 blended with the dorsal interosseous fascia — an arrangement which was 

 noticed by Meckel in some subjects unprovided with a peroneus tertius. 

 In all the nine other instances the tendon was more fully developed, 

 and joined in forming the extensor ajwneurosis of the little toe. In one 

 subject only (No. 17) was it confined to one side. Three were found 

 in the 12 female subjects, and nine in the 22 males, showing a larger 

 proportion in the latter. 



27. Extensor primi internoclii liallucis longus. — In no less than 19 

 subjects, or more than one half, was found, in both legs, a long tendon 

 attached to the inner part of the base of the first phalanx of the great 



VOL. XV. 2 X 



