880 MR. ST. GEORGE MIVART ON THE [ Dee. 6, 
The vastus internus (fig. 19, V. £) is a rather small muscle arising 
from the inside of the shaft of the femur, almost down to the distal 
end of the bone. It blends below with the other extensors. 





Back view of right leg. 
B. Biceps. B.H. Flexor brevis hallucis. B.M. Flexor brevis minimi digiti. 
F. D'. Flexor longus digitorum. J’. D*. Flexor tertius digitorum. G. Gra- 
cilis. G.#. Gastrocnemius externus. G.Z. Gastrocnemius internus. J. P. 
Tlio-peroneal. P. Peroneus. S. Tibial adductor. iS. Mf. Semimembra- 
nosus. SS. Z. Semitendinosus. 7. A. Tibialis anticus. 7! P. Tibialis pos- 
ticus. y. Tendon of femoro-caudal. 
Crureus (fig. 21, C). This is very large, but with difficulty sepa- 
rable from the two preceding muscles. It arises from the extensor 
surface of the femur, its origin extending upward to the neck of the 
bone on its inner aspect (passing up on the inner side of the insertion 
of the iliacus); fusing with the other extensors, it is inserted with 
them into the patella. 
The gastrocnemius externus (figs. 17, 18, 19, 23, & 24, G. EF) 
arises by a long and strong, but delicate tendon from the postero- 
peroneal aspect of the interarticular cartilage. This tendon passes 
down between the flexor longus and flexor tertius digitorum. Rapidly 
broadening downward (as a fleshy mass having the gastrocnemius 
internus superficial to it), it is inserted into the plantar ossicle. 
The gastrocnemius internus (figs. 18, 19, 20, 23, & 24, G. I) does 
