884 MR. ST. GEORGE MIVART ON THE [ Dec. 6, 
The popliteus (figs. 20 & 26, P P) arises from the tibial side of the 
head of the fibula so far forwards that it is visible on the front of 
the leg when the covering summit of the flexor longus hallucis is 
removed. Passing downward it is inserted into the peroneal and 
posterior surface of the tibia for rather more than its upper two-~ 
thirds. 
Peroneo-tibial (figs. 20 & 26, P. T). This muscle springs from 
the lower half of the peroneal surface of the fibula, and is inserted 
(its upper fibres descending and its lower fibres passing transversely) 
into the lower third of the peroneal border of the tibia, and into the 
peroneal side of its anterior surface. It appears on the front of the 
leg when the first part of the extensor brevis of the hallux is removed. 
Behind, it is covered by the tibialis posticus. 
Peroneus (figs. 2, 17, 20, 23, & 24, P). This is a very large 
muscle, which is only imperfectly to be divided into two parts. 
The first part arises from the front of the fibula, the origin 
extending from in front of the bottom of the insertion of the ilio- 
peroneal, upwards and tibiad, over the front of the fibula to a level 
with the top of the insertion of the ilio-peroneal. It also arises by 
fascia from the peroneal side of the upper part of the tibia, beneath 
the origin there of the extensor longus digitorum, and almost as 
high up as the summit of the origin of the tibialis anticus. Passing 
downward, it is inserted into the dorsum of the fifth metatarsal. 
Fig. 27. 

Caudal muscles. 
C.D. Infero-caudal. D*. Gluteus secundus. F.C. Femoro-caudal. Z C. Ischio- 
caudal. J/.C. Uio-caudal. LZ. C. Cloacal muscle. TJ. Transversus perinei. 
X, Gluteus maximus. y. Tendon of femoro-caudal. 
The second part springs from the peroneal border of the fibula, 
beneath the insertion of the ilio-peroneal, and intimately connected 
