THE HIND EXTREMITY. 261 



A thick band of white fibrous tissue fills up the trian- 

 gular space, which is bounded by the brim of the pelvis on 

 either side from the pectineau tubercle to the symphysis. 

 Around this the pectineiis winds in a direction backwards 

 to its insertion into a roughened line on the inner surface 

 of the femur, commencing at the inferior extremity of the 

 trochanter minor internus. To the under surface of the 

 above-mentioned ligament is attached the common tendon 

 of the abdominal muscles, and from each of its lateral 

 parts a round tendinous cord runs to pass above the trans- 

 verse ligament of the hip- joint, and becomes inserted into 

 the head of the femur ; it is the puhio-femoral ligament. 

 Posteriorly placed to this is a large vein which runs from 

 one external iliac vein in a transverse direction to the other, 

 and which receives on either side in the male a branch from 

 the penis, in the female from the mammary gland ; by 

 this vein (the transverse branch) pectineus is separated 

 from the small head of 



Biceps adductor femoris, which arises from the under 

 surface of symphysis pubis. The large head of this muscle 

 arises from the under surface of symphysis ischii ; opposite 

 trochanter minor internus, the two combine to form 

 a single fleshy mass, the muscle then rediyides ; the 

 smoiler head becomes inserted into the posterior part 

 of the middle and inferior thirds of the femur just 

 below the inner small trochanter ; the large extends 

 obliquely over the posterior surface of the femur as far 

 down as the outer condyle ; the femoral artery and vein 

 pass between its fibres, thus apparently dividing it into 

 two heads, the lower of which blends with the inser- 

 tion of ischio-tibialis, thus becoming attached to " the in- 

 ternal surface of the inferior extremity of the femur, and 

 of the head of the tibia and the lateral ligament which 

 connects them." 



On removal of these muscles we expose the insertion 

 common to iliacus and psoas magnus into trochanter minor 

 internus. 



Iliacus arises from the venter surface of the ilium, ex- 

 tending as far downwards as the pectineau tubercle, as far 

 back as the transverse process of the first sacral bone to 

 which it is attached. It is in contact v/ith the inner surface 

 of the capsular ligament of the hip-joint, to which it is 

 attached, and blends with psoas magnus to become in- 



