312 MYOLOGY OF CHLAMYDOSAURUS KINGII, 



Rectus femoris (fig 5 — r. f.) — Tendinous from the brim of the 

 acetabulum, passes beneath the origin of the adductor tibialis at the 

 proximal third of its length, is joined by a long slip rising 

 tendinous from the iliopubic spine below the origin of the glutceus 

 maximus, and is inserted into the patella, in common with the 

 crurseus. 



Glutceus maximus (fig. 5 & 6 — g. mx.) — Rising from a thin 

 strong tendinous fascia attached to the ilio-pubic ligament, it is 

 bound down posteriorly by tendinous fibres to the ilioischiatic 

 ligament arching over the passage of the femoro caudal tendon : 

 and fuses with the crurseus midway on its anterior surface, and 

 lower down on its outer lateral side. 



Glutceus medius (fig. 5 — m. a.) — From the inferior outer border 

 of the ilium passing from under the origin of the maximus ; — 

 inserted into the proximal third of the posterior surface of the 

 femur behind the origin of the crurseus. 



Femoro-caudal (fig. 9 — f. c.) — A strong muscular sheet from the 

 lower side of the proximal fourth of the tail ; — inserted by a broad 

 strong tendon into a low ridge or row of tubercles at the outer 

 base of the trochanter : reflexing and rotating the femur. From the 

 lower side of its tendon near insertion, a long slender tendon, 

 sent down the biceps, runs to the interarticular cartilage beneath 

 the poplitceal space, and is there inserted. 



Pyriformis (fig. 7 — p. f.) — From the lower surface of the first 

 three transverse processes of caudal vertebrae ; inserted into the 

 iliopubic ligament, and thence into the trochanter immediately 

 external to the tendon of the femorocaudal. A minute belly rising 

 from the ischiatic tubercle, and inserted by tendon into the side 

 of the head of the femur appears to be an accessory slip. 



Pectineus. — In three divisions. The first a small fusiform 

 belly rising in front of the pubic spine, and going to the lower 

 part of the trochanter ridge superficial to the second, which 

 is a larger fascicle from the pubic spine into the same ridge 

 immediately above it. The third is from the concavity formed by 

 the reflected lip of the pubis, and goes to the same insertion in 

 union with the previous one. 



