466 ON THE MYOLOGY OF MENOBRANCAUS LATERALIS. [June 24, 
and fibula. It is inserted into the tarsus aud lower part of the tibia 
on the inner side of the leg. The inner portion (7. 4. 1) is much 
like the extensor hallucis of Menopoma as to its origin, but it does 
not appear to descend below the shaft of the tibia. 
Peroneus (fig. 9, P). There is a muscle descending down the 
outer side of the leg, from the head of the fibula to the tarsus, 
as in Menopoma. 
The extensor longus digitorum (figs. 9 & 10, #. L. D) is a large 
sheet of muscle covering the front of the leg. It arises by a strong 
aponeurosis from the front of the distal end of the femur. Passing 
downwards, it goes to the digits. 
Extensor hallucis(?) (fig. 10, Z. H). A small muscle which I 
thus name, with doubt and hesitation, takes origin from the lower 
part of the fibula, and, crossing the limb obliquely, passes to the 
dorsum of the hallux. Except that this muscle appears only to 
go to the innermost digit, it has very much the appearance of an 
extensor brevis digitorum. 
Extensor brevis digitorum. This muscle seems to be entirely 
wanting, unless what I have doubtfully named extensor hallucis be 
really the extensor brevis. 
wa ST: 
ZD. 
Deepest muscles of ventral or flexor surface of right pelvic limb, the fle«or 
digitorum being cut and reflected. 
F.D. Flexor digitorum. fF. H. Flexor hallucis. G. Gracilis. S. 7. Semiten- 
dinosus. <X. Tibialis posticus? 
Flexor digitorum (figs. 8, 11, & 12, F.D). Subtriangular in 
shape, this muscle takes origin from the posterior surface of the 
peroneal condyle of the femur; thence expanding as it descends, it 
goes to the digits. 
Flexor hallucis (figs. 8 & 12, F.H). Beneath the muscle last 
described is a muscle which arises from the posterior surface of the 
fibula and goes mainly, if not entirely, to the most tibial digit. 
On the peroneal border of this muscle, between it and the flexor 
digitorum, a delicate bundle of muscular fibres passes downwards 
(fig. 12, X) to the carpus. It is entirely hidden by the flexor 
digitorum, so as to be only visible on the removal or reflection of 
the latter. Is this delicate muscle the representative of the tibialis 
posticus ? 
