35S ZOOTOMY. 



the symphysis pubis, and is inserted into about the middle 

 third of the shaft of the femur. 



446. The adductor brevis (ad.b), a small, flat muscle 

 situated just anterior to the inner two-thirds of the preced- 

 ing : it arises from the anterior end of the symphysis pubis, 

 and is inserted by a broad tendon into the shaft of the 

 femur. 



447. The pectineus {pc), a small muscle situated 

 immediately in front of the preceding, which it resembles 

 in shape and size : it arises from the pubis just in front of 

 the symphysis, and is inserted into the shaft of the femur : 

 cut through and reflect it as well as the adductores brevis 

 and longus. 



448. The insertions of the psoas magnus (§ 433) and 

 iliacus (§ 436) are now exposed : divide both muscles near 

 their insertion and reflect. 



449. The gluteus maximus {gl.ma), covering the outer 

 or gluteal surface of the ilium : it arises by a broad fascia 

 from the ischial border of the ilium and from the sacrum : 

 anteriorly it becomes inseparably united with the rectus 

 anticus, posteriorly its origin is covered by the anterior head 

 of the biceps : it consists of two parts, one lying mainly 

 external to the pubic border of the ilium and having its 

 fibres directed longitudinally, the other at about the level of 

 the acetabulum and having its fibres directed transversely : 

 the two portions unite with one another and are inserted 

 into the third trochanter : detach from its origin and 

 reflect. 



450. The gluteus medius {gl.me), exposed by removal 

 of the preceding : it arises from the supra-iliac and iliac 

 borders of the ilium and from the sacrum : its fibres pass 

 directly backwards, and are inserted into the great trochanter : 

 detach from its origin and reflect. 



