BY CHARLES W. DE VIS, B.A. 313 



Obturator externus. — From the ischium and obturator mem- 

 brane, in continuity with the last ; inserted into the trochanteric 

 fossa higher than the insertion of the pyriformis. 



Obturator internus. — Possibly represented by the slip referred 

 to the pyriformis with which it may have no real connection. 



Iliacus 'primus. — A long flat band from the median raphe on 

 the deep surface of the pubis ; it passes over the brim of the pelvis 

 close by the pubic spine receiving fleshy fibres from the brim in 

 its passage and is inserted into the acetabulo-ischiatic ligament. 



Secundus (fig. 7 — i. 2) — A long thin muscle rising also from the 

 median raphe, and passing dorsad of the primus over the pelvic 

 brim. 



Tertius (fig. 7 — i. 3)— Broad and strong from the whole deep 

 surface of the pubis and ischium. It passes over the brim of the 

 pelvis between the two heads of the rectus, and is inserted into the 

 second upper fourth of the femur, becoming also continuous with 

 the origin of the vastus externus. On the left side however, it has 

 no connection with the vastus, but sends fibres to the cruralis 

 from its lower transverse edge. 



Gastrocnemius internus (fig. 9 & 10 — g. i.) — From the whole 

 length of the inner condyle of the femur between the tendons of 

 the sartor — gracilis and inner semimembranosus, and of the biceps. 

 Its outer edge is strengthened by the long tendon of the biceps. 

 It forms the superficial plantar fascia, strengthening the tendons 

 of the gastrocnemius externus. 



Gastrocnemius externus (fig. 9 & 10 — g. e.) — Rises together 

 with the plantaris from the outer femoral condyle above the outer 

 semimembranosus, and the peronseus primus. As it passes over the 

 flexor profundus it communicates fibres to it in one leg but not in 

 the other. In its distal portion, its line of junction with the 

 plantaris is obvious, but the two are still inseparably blended. It 

 is inserted as part of the 



Plantaris (fig. 10 — p. 1.) — "Which, rising in union with the pre- 

 ceding, has three insertions, First or fibular division ; — its tendon 

 splits into unequal parts, whereof the first receives a tendon from 



