60 
from the proximal end of the tibia: this tendon moreover receives the long slender tendon 
sent off obliquely across the front of the knee-joint from the pectineus (rv), by which its 
origin is extended to the pelvis. This accessory tendon perforates the inner fleshy sur- 
face of the muscle, and is finally lost about half-way down the carneous part. Before 
the flecor perforatus is joined by the tendon of the pectineus, it subdivides posteriorly 
into four muscular fasciculi. The anterior division receives principally the above tendon, 
and this division of the muscle becomes wholly tendinous two-thirds down the leg ; its 
tendon (3) passes through the posterior part of the pulley of the gastrocnemius, and ex- 
pands as it passes along the metatarsus : a thick ligamentous substance is developed in 
it opposite the joint of the proximal phalanx of the second toe, into the sides of which 
it is inserted, dividing for that purpose, and giving passage to the two other flexor ten- 
dons of that toe. The second portion of the present muscle terminates in a tendon (4) 
situated behind the preceding, which passes through a distinct sheath behind the tarsal 
joint, expands into a sesamoid fibro-cartilage beneath the corresponding expansion of 
the previous tendon, which it perforates, and then becomes itself the perforated tendon 
of the second phalanx of the second toe, in the sides of which it is inserted. The third 
portion of this muscle ends in a somewhat smaller tendon (5) than the preceding, which 
forms the second perforatus flewor of the third or middle toe. The fourth and most pos- 
terior portion soon becomes a distinct muscle ; its fleshy fibres cease on the inner side, 
one-fourth down the leg, but on the outside they are continued three-fourths down the 
leg ; its tendon (6) passes through the gastrocnemial pulley behind the ankle-joint, and 
divides to form a sheath for the flecor perforatus of the fourth toe ; it is then joined by the 
tendon of the peroneus (7), which passes through a pulley across the external malleolus, 
and finally becomes the perforated tendon of the first phalanx of the middle or third toe. 
Pectineus (Pl. XI. XIV. 1), (Rectus anticus femoris of Cuvier* and Meckel}).—This is 
a long, thin, narrow strip of muscle arising from the spine of the pubis, anterior to the 
acetabulum, and passing straight down the inner side of the thigh ; it degenerates into a 
small round tendon near the knee, which tendon traverses a pulley, formed by an oblique 
perforation in the strong rotular tendon of the extensors of the leg, and thus passing 
across the knee-joint to the outer side of the leg, finally expands, and is lost in the flexor 
perforatus digitorum last described. It is this muscle which causes the toes to be bent 
when the knee is bent. 
Peroneus longus (Pl, XI. XIV. 7).—Origin, Tendinous from the head of the tibia, and 
by carneous fibres from the upper half of the anterior margin of the tibia; these fibres 
pass obliquely to a marginal tendon, which becomes stronger and of a rounded form 
where it leaves the muscle. The tendon gives off a broad, thin, aponeurotic sheath to 
be inserted into the capsule of the tarsal joint ; it is then continued through a synovial 
pulley on the side of the outer malleolus, and is finally inserted or continued into the 
perforated tendon of the middle toe (6). 
* Lecons d’Anat. Comp. ed. 1836, p. 523, + Vergleich. Anat., Th. iii. p. 365. 
