532 A MANUAL OF ANATOMY. 



abdominal ring behind the cord (or round ligament), to be 

 distributed to the integument over the upper and inner part 

 of the thigh and outer surface of the scrotum or labium 

 majus. 



(3) The g-enito crural, from the first and second lumbar 

 nerves. 



This nerve appears at the inner side of the psoas, runs 

 downward upon its anterior surface, and divides just above 

 Poupart's ligament into the genital and crural branches. 

 The genital branch turns outward to join the cord and 

 leave the abdomen through the internal abdominal ring to 

 supply the cremaster muscle (in the female the round liga- 

 ment). The crural branch continues downward under 

 Poupart's ligament at the outer side of and in front of the ex- 

 ternal iliac and femoral arteries, pierces the fascia lata at the 

 lower border of the saphenous opening (two inches below 

 Poupart's ligament), and supplies the central and upper 

 region of the front of the thigh. 



(4) The external cutaneous. From the second and third 

 nerves. Emerges from the outer border of the psoas mus- 

 cle, below the crest of the ilium, extends outward and 

 downward across the iliacus muscle, passes under Poupart's 

 ligament close to the anterior superior iliac spine, in front 

 of the origin of the sartorius, descends vertically in a canal 

 in the fascia lata for four or five inches, then becomes 

 superficial and supplies the integument over the anterior 

 and outer surfaces of the thigh, nearly to the knee. Just 

 after coming out from under Poupart's ligament, a branch 

 is given off that turns backward to supply the skin over the 

 great trochanter. 



(5) The anterior crural nerve. Formed from the second, 

 third, and fourth lumbar nerves. Descends in the interval 

 between the psoas and iliacus muscles, being covered by 



