DISSECTING MANUAL. 



lumbar vertebra, and adjacent margins of the vertebras they 

 lie between; four aponeurotic arches over sides of bodies of 

 first four lumbar vertebras; all the lumbar transverse proc- 

 esses. Course; it descends over the pelvic brim and under 

 Poupart's ligament; a bursa, which may communicate with 

 the hip-joint, separates its tendon from the pubis and hip- 

 joint capsule. Insertion; apex of lesser trochanter. [362] 



Psoas Parvus (inconstant). Origin; intervertebral disc be- 

 tween last thoracic and first lumbar vertebra ; contiguous mar- 

 gins of these vertebrae. Insertion; middle of ileo-pectineal 

 line and ileo-pectineal eminence. [363] 



Iliacus. Origin; around margin of iliac fossa; anterior 

 sacro-iliac and ilio-lumbar ligaments. Course; under Pou- 

 part's ligament and over hip-joint. Insertion; outer side of 

 Psoas magnus tendon; concave anterior surface of small tro- 

 chanter; capsule of hip-joint (the latter are the most external 

 fibres and are often separate, forming the Iliacus minor, or 

 Ilio-capsularis). [363] 



Pectineus. Origin; sharp anterior portion of pubic ilio- 

 pectineal line, and (sometimes) triangular surface of pubis in 

 front of this. Insertion; upper half of line leading from small 

 trochanter to linea aspera. [364] 



Scarpa's triangle corresponds to the depression just below the 

 groin and is triangular, apex downward. It is bounded above 

 by Poupart's ligament, externally by the Sartorius, and inter- 

 nally by the Adductor longus. Its floor is formed, from 

 without inward, by the Ilio-psoas, Pectineus, and Adductor 

 longus. 



Hunter's canal is a channel in the middle third of the 

 thigh, which extends from the apex of Scarpa's triangle to 

 the opening, for the femoral artery, in the Adductor magnus. 

 Its floor is formed by the Adductor longus above and 

 Adductor magnus below; its roof by the Sartorius and the 

 fascial expansion under this; and its outer wall by the 

 Vastus internus. 



[274] 



