874 MR. ST. GEORGE MIVART ON THE [ Dec. 6, 
of the tuberosity of the ischium, close to the origin of the semitendi- 
nosus, which is superficial and posterior to it. It is inserted by a 
long and strong tendon (in common with the peroneal part of the 
bifureating tibial adductor) into the antero-peroneal aspect of the 
head of the tibia. 
Pie. /. 





















7 
{ 
| ae 
: 
Deeper muscles of outer aspect of right pelvic limb; the ilio-peroneal cut 
and reflected. 
A, Adductor. B. Biceps. D'. Gluteus primus. D?. Gluteus secundus. D%. 
Gluteus tertius, #.Z. Extensor longus digitorum. F'? & F3, Rectus fe- 
moris. F.C. Femoro-caudal. F. D1. Flexor longus digitorum. F. D°. 
Flexor tertius digitorum. G. Gracilis. G.#. Gastrocnemius externus. 
I. P. Tlio-peroneal. P. Peroneus. 8S. Tibial adductor. S. Mf, Semimem- 
branosus. V.Z. Vastus externus. XX. Gluteus maximus. y. Tendon of 
femoro-caudal. 
Semitendinosus (figs. 18, 19, 23, & 24, S. T.). This springs, in 
common with the biceps, close to the tuberosity of the ischium, from 
the tendinous ilio-ischiatic arch, just behind the origin of the semi- 
membranosus. Crossing beneath the tibial adductor, it is inserted 
into the tibial aspect of the interarticuiar cartilage, in common with 
(though below) the smaller (tibial) branch of the bifureating tibial 
adductor. ‘This may, perhaps, be the muscle which Professor Rol- 
leston considers to be the gracilis. 
Biceps (figs. 2, 17, 18, 23, & 24, B.). This muscle takes origin 
from the before-mentioned ilio-ischiatic tendinous arch, close oppo- 
site to and more or less continuous with the gluteus maximus. 
Passing downward to the calf of the leg, itis inserted, by a tendon, 
