536 Mr. J. Wood on Variations in Human Myology. [May 23, 



toe distinct from that of the extensor Irevis digitorum. In three subjects 

 (JSTos. 9, 17, & 31) this tendon was provided with a well-developed and 

 distinct penniform muscular belly, arising from the fibula and inter- 

 osseous ligament, and separated by an areolar interval from that of the 

 extensor longus or proprius Jiallucis. In a male subject (No. 9) this 

 muscle lay at first outside the extensor proprius, and was provided with 

 two tendons, the outer one joining the great-toe tendon of the extensor 

 hrevis, and the inner, crossing under that of the extensor proprius, was 

 inserted into th.e usual place on the inner border of the base of the 

 first pTialanx. In a female (No. 17) the muscle lay to the inner side of 

 the extensor proprius, its tendon subdividing in the same way, and going 

 to the same destinations as the last specimen, but the outer one cross- 

 ing in this case under the extensor proprius. In another female 

 (No. 31) the right leg was provided with a distinct muscle of this kind, 

 with, a single tendon joining that of the extensor brevis. In the left 

 leg it was represented only by a slip of tendon given from that of the 

 extensor proprius at the ankle, and lying inside it along the foot to the 

 first phalanx, where it was inserted in the usual way. In the 11 other 

 subjects, the latter was the arrangement in both legs, the muscular 

 fibres, together with the upper part of the tendon, being united more 

 or less with those of the extensor propriusJ~ Meckel remarks that the 

 above abnormality is homologous to the extensor primi internodii pol- 

 lieis in the hand. It is also mentioned by Soemmerring, Theile, and 

 Henle. 



In a male subject (No. 23) this tendon to the base of the first 

 phalanx of the hallux was given off" from the outer side of that of 

 the tibialis anticus. This anomaly had been previously found by the 

 author in two subjects (also males), which were described and figured in 

 his first paper on the subject. He is not aware that it has been ob- 

 served by any other anatomist. It is not to be confounded with tlie 

 common insertion of a slip of the tibialis tendon into the base of the 

 first metatarsal bone. During the last ^Session a fine example of this 

 formation was seen in a still-born male foetus, which was not found to 

 present any other muscular variety. In another adult male (No. 33) 

 it was found in the right leg, with the addition of a second slip of 

 tendon from the extensor proprius ; while in the left leg, twojilips came 

 from that of the latter muscle, the outer joining the tendon of the ex- 

 tensor Irevis digitorum^ and the inner inserted separately into the base 

 of the first phalanx of the hallux, as before seen in those (Nos. 9 & 

 17) with complete muscular bellies. The forward prolongation from 

 the tendon of the tibialis anticus to the hallux presents a curious pa- 

 rallel on the inside to that of the quinti from the peroneus hrevis on 

 the outside of the foot. A^blending of the tibialis^anticus with the 

 long extensor of the great toe is said by Meckel to be found in the Por- 

 cupine. Six out of the nineteen subjects possessing a separate tendon 



