Charles R. Bardeen 29: 
Oo 
the n. surae medialis was not found. In 7 out of 76 instances two 
branches arose from the peroneal nerve in the popliteal space. One of 
these supphed the side of the leg below the knee; the other supplied the 
back of the leg and sent a branch of communication to the n. surae 
medialis. This mode of distribution is described as the normal by many 
authors. In one instance the peroneal nerve gave rise to the sural (ex- 
ternal saphenous) while the tibial furnished a cutaneous branch for the 
skin over the calf. In five other instances the n. cutaneus surae medialis 
gave rise to a cutaneous branch for the supply of the upper part of the 
calf. The extent of distribution of the various branches mentioned is in- 
versely proportional to the extent of distribution of the posterior cutan- 
eous nerve of the thigh and the saphenous and obturator nerves. Great 
individual variations are found. 
b. N. Cutaneus peronei femoralis—In one instance in which the 
tibial and peroneal nerves arose separately from the plexus the peroneal 
nerve passed between two divisions of the pyriformis muscle, 
then lateral to a fasciculus of the short head of the biceps 
which arose from the proximal end of the gluteal tuberosity. It 
crossed the antero-lateral surface of this fasciculus, and then between 
it and the main portion of the muscle to its usual position in the thigh. 
Near the middle of the shaft of the femur it gave off a branch which 
passed through the short head of the biceps to the side of the thigh 
where it divided into ascending and descending branches and supplied 
a large area between the territories of the n. cutaneus femoris lateralis 
and the n. cutaneus femoris posterior. This abnormal cutaneous nerve 
I have not found previously described. It resembles somewhat a nerve 
in the orang described by Klaatsch, 02. 
c. Nn. Cutanei dorsales pedis——In the great majority of instances 
the n. cutaneus peroneus superficialis divides into two main terminal 
branches just above the ankle. One of these, the n. cutaneus dorsalis 
medialis, passes directly to the outer side of the big toe, giving off on 
its way a branch to supply the contiguous sides of the 2d and 3d toes 
and small branches to anastomose with those branches of the n. peroneus 
profundus which supply the contiguous sides of the first and second 
toes. The other, the n. cutaneus dorsalis intermedialis, passes down 
to supply the contiguous sides of the third and fourth, and fourth and 
fifth toes. This general mode of distribution was found in 44 in- 
stances out of 111 (about 40%). In two of the 44 cases above men- 
tioned the sural nerve failed to extend to the little toe and a special 
