s.

Q. The tendon of the flexor longus communis digitorum muscle.

R. The tendon of the flexor longus pollicis muscle.

S. The tendon of the peronaeus longus muscle.

T. The peronaeus brevis muscle.

U U. The internal annular ligament binding down the vessels, nerves, and
tendons in the hollow behind the inner ankle.

V V. The tendo Achillis.

W. The tendon of the tibialis posticus muscle.

X. The venae comites of the posterior tibial artery.

PLATE 66.

A C D E F G H I indicate the same parts as in Plate 65.

B. The inner condyle of the femur.

K. The plantaris muscle lying upon the popliteal artery.

L. The popliteus muscle.

M M M. The tibia.

N N. The fibula.

O O. The posterior tibial artery.

P. The peronaeal artery.

Q R S T U V W. The parts shown in Plate 65.

X. The astragalus.

[Illustration: Left leg, showing muscles, blood vessels and other
internal organs.]
Plates 65, 66

COMMENTARY ON PLATES 67 & 68.

THE SURGICAL DISSECTION OF THE ANTERIOR CRURAL REGION,
THE ANKLES, AND THE FOOT.

Beneath the integuments and subcutaneous adipose tissue on the fore part
of the leg and foot, the fascia H H, Plate 67, Figure 2, is to be seen
stretched over the muscles and sending processes between them, thus
encasing each of these in a special sheath.

The fascia is here of considerable density. It is attached on the inner
side of the leg to the spine of the tibia, D, Plate 67, Figure 2, and on
the outer side it passes over the peronaeal muscles to those forming the
calf. Between the extensor communis digitorum, B b, and the peronaeus
longus, F, it sends in a strong process to be attached to the fibula, E.
In front of the ankle joint, the fascia is increased in density,
constituting a band (anterior annular ligament) which extends between
the malleoli, forms sheaths for the several extensor tendons, and binds
these down in front of the joint. From the lower border of the annular
ligament, the fascia is continued over the dorsum of the foot, forming
sheaths for the tendons and muscles of this part. Behind the inner
malleolus, d, Plate 67, Figure 1, the fascia attached to this process
and to the inner side of the os calcis appears as the internal annular
ligament, which being broad and strong, forms a kind of arch, beneath
which in special sheaths the flexor tendons, and the posterior tibial
vessel and nerve, pass to the sole of the foot. On tracing the fascia
from the front to the