234 MARSHALL— A STUDY OF THE 



[June 19, 



third of the femur, and here finds a fleshy insertion on the linea as- 

 pera, occupying its posterior surface. Pars iliaca is absent and pars 

 caudalis does not agree in origin with Gadow's (/. e.) description. 



9. M. ischio-femoralis (Ise. fin., PL VI, Fig. 35). This 

 muscle is proximal to the above. It springs from joining surfaces 

 of ischium and ilium and from neighboring surface of ischium down 

 to the origin of the m. pub.-ischo-femoralis. This short, thick, flat 

 muscle there crosses the femur and is inserted by a small, thin 

 tendon at the base of the trochanter. 



10. M. piib-ischio-femoralis {PI), ise.fm., PI. VI, Figs. 33, 35). 

 This is one of the largest muscles of the thigh. It arises from the 

 proximal half of the pubis and ischium along their line of union. 

 It passes somewhat obliquely over to the distal half of the femur 

 and is there inserted fleshily by its anterior border. Its fibers are 

 intimately associated with those of the m. caud-ilio-flexorius. It 

 consists of only one portion, a thick, flat layer. 



11. M. obturator (Obt., PL VI, Fig. 35). This is the deepest 

 lying of the muscles of the outer surface. It springs fleshily from 

 the edges of the foramen obturatum. Thence it passes to the poste- 

 rior border of femur, and there is attached semitendinously. The 

 muscle varies considerably from that of Gadow's (/. e.) of the 

 same name. It agrees in some points with his mm. accessorii m. 

 obturatoris. 



12. M. ilio-femoralis internus {II. fin. int., PL VI, Fig. 33). 

 This somewhat triangular muscle comes from the ventral surface, 

 near its lateral border, of the preacetabular ilium extending almost 

 to the acetabulum. It passes to the ventral surface of the femur 

 just distal to the head, and is there attached. The muscle is fleshy 

 both at origin and insertion. 



13. X. (PL VI., Fig. 33). This is a long slender muscle begin- 

 ning distal to the insertion of the m. ilio-femoralis internus, and is 

 attached fleshily to the ventral surface of the femur for its remain- 

 ing length. It terminates distally in a thin, flat tendon which is 

 inserted on the dorso-ventral border of the proximal end of the 

 tibia. Gadow (/. c. ) did not describe such a muscle. 



The following muscles were not found : m. ilio-femoralis exter- 

 tuis, m. amine us, mm. aeeesorii m. obturatoris. 



