The Muscles 119 
Tensor faciz latae, Tensor femoris vagine, Glutzeus 
minimus, Tensor facia femoris). This muscle, in 
the Crocodilia, consists of two parts: 
I. The chief part is long and broad, and springs 
as a tendon from more than the anterior half of the 
lateral border of the dorsal crest of the ilium, cover- 
ing the origin of the ilio-fibularis muscle. Its 
insertion, by a broad, flat tendon, overlying the 
femoro-tibialis muscle, together with the tendon of 
this muscle, is on the anterior surface of the head 
of the tibia. 
II. The second, significantly smaller and nar- 
rower, part arises outside of the quadratus lum- 
borum by a short tendon from the most dorsal 
end of the ilium; it goes over, medially, along the 
nearer head of the ambiens muscle, then to the 
anteromedial side of the upper leg, into the deeper- 
lying femoro-tibialis muscle. 
Femoro-tibialis (Plate III., Fig. 1, fm. tb., Plate 
IV, Fig. 2, 1m. tb, Plate V., Figs. 1 and 3, fm.tb.) 
(Crureus et Vasti, Cruralis). Arises by an ante- 
rior inner and a posterior outer head; both heads 
arise from the outer-anterior and inner surfaces of 
the femur, and unite with each other and with 
the extensor ilio-tibialis and ambiens muscles as a 
strong tendon, which extends over the knee and 
is inserted on the anterior border of the head of 
the tibia; this tendon incloses, like a sheath, the 
end-tendon of the ambiens muscle. 
Ilio-fibularis (Plate IIT., Fig. 2, il. fib., Plate IV., 
