120 The Alligator and Its Allies 
Bie. 2, il. fib. Plate V., Fig. 3, il. fib.) (Biceps 
cruris, Semitendinosus+Semimembranosus, Glu- 
teus maximus, Abductor fibularis, Flexor abductor 
cruris). This consists, in the Crocodilia, of two 
entirely separate small, band-like muscles. The 
first springs by a short tendon from the lateral 
surface of the middle ilium, very near the origin of 
the caudali-ilio-femoralis and extensor ilio-tibialis 
muscles. The chief part of the end-tendon is in- 
serted at the end of the first sixth of the fibula, 
on its outer-forward corner near the origin of the 
peroneus anterior muscle; a shorter tendon-branch 
goes to the tendon of the peroneus posterior mus- 
cle; and a third, still smaller branch goes to the 
caput femorale of the gastrocnemius muscle, by 
which it contributes to the structure of the lateral ' 
part of the tendo-communis externus. 
The second part springs, by an equally short 
tendon, very near the first, from the hinder end of 
the dorsal crest of the ilium, goes directly over the 
preceding to the knee, where its tendon unites with 
that of the extensor ilio-tibialis muscle. 
Ilio-femoralis (Plate III., Fig. 2, il. fm., Plate IV., 
Pie. 2, iL, im., Plate Vi, Pie.-i, iy £).  (Gloteus, 
Quadratus femoris [?], Glutaus medius). This 
muscle is inwardly fused with the caudali-ilio- 
femoralis, whose anterior part it forms. 
Caudali-ilio-femoralis (Plate III., Fig. 2, cd. il. 
fm., Plate IV., Fig. 1, cd. il., fm.) (Zweiter Aus- 
wartsroller, Extensor femoris caudalis accessorius, 
