THE ABDOMEN 779 



outer side of the external iliac arten', between it and the psoas 

 magnus muscle, except the lowest gland, which lies upon that muscle. 

 The middle chain lies in front of the external iliac vessels. The 

 inner chain lies below the level of the external iliac vein, upon the 

 upper part of the lateral wall of the pelvis, above the obturator 

 nerve. One of the glands of this chain may lie within the pelvic 

 entrance to the obturator canal, and is spoken of as the obturator 

 gland, but it is not constant. The lowest gland of each chain lies 

 close to the deep aspect of Poupart's ligament, and these are known 

 as the retfo- femoral glands — external, middle, and internal respec- 

 tively. 



The afferent vessels of the external iliac glands convey IjTnph 

 from the following sources : 



1. The deep femoral glands, 



2. Some of the inguinal and superficial femoral glands. 



3. The deep structures of the antero-lateral abdominal wall hdow 

 the umbilicus. 



4. To a certain extent the glans penis, or glans clitoridis, these 

 hTTiphatics passing along the inguinal canal. 



5. The adductor muscles. 



6. The prostate gland and prostatic urethra, in part. 



7. The bladder. 



8. Part of the membranous and the bulbar portions of the urethra. 



9. The upper part of the vagina. 



10. The body and cersix of the uterus. 



The efferent vessels of all the external iliac glands pass to the 

 common iliac glands. 



Lacunar Region. — ^The lacunar region is situated between 

 Poupart's ligament and the anterior margin of the os innomi- 

 natum, and is divided into two compartments — ^muscular and 

 vascular. 



The muscular lacuna is subdi\nded into two portions, external 

 or iliac, and internal or pectineal, by the ilio-peciine^l septum, 

 which separates the psoas magnus from the pectineus. This 

 septum passes between the ilio-pectineal eminence and the fascia 

 ihaca at its point of junction with the upper part of the pubic 

 portion of the fascia lata. The iliac compartment, which is of large 

 size, is bounded in front by the outer part of Poupart's ligament 

 and the iliac fascia, behind by the anterior margin of the iliiun, and 

 internally by the ilio-pectineal septum. It transmits (i) the ilio- 

 psoas muscle, (2) the external cutaneous nerve, and (3) the anterior 

 femoral ner\'e. The pectineal compartment is situated between the 

 superior pubic ramus behind, and the upper part of the pubic 

 lamina of the fascia lata in front, the ilio-pectineal septum being 

 external to it. It contains the origin of the pectineus muscle, and 

 is shut off from the abdominal ca\nty by the attachment of the 

 pubic lamina of the fascia lata to the pectineal portion of the ilio- 

 pectineal line. In connection with this portion of the fascia lata 



