LYMPHATIC SYSTEM OF THE OX AND SHEEP 729 
The deep inguinal lymph gland! is situated ventral to the psoas minor, at the 
angle of divergence of the circumflex iliac from the external iliac artery. It is 
discoid and is commonly two to three inches (ca. 5-7.5 em.) in length. A smaller 
gland may be present near the large one or at the origin of the prepubic artery. The 
afferent vessels come chiefly from the abdominal muscles; the pelvic limb; the 
urinary organs, the vesicule seminales, tunica vaginalis, cremaster muscle; and 
the superficial inguinal, external iliac, sacral, prefemoral, and popliteal glands. 
The efferent vessels go in part to the internal iliac glands, in part directly to the 
lumbar trunk. 
The external iliac lymph glands (Lge. iliacee laterales) number one or two on 
each side, and are situated at the bifurcation of the circumflex iliac artery. In the 
majority of cases a single gland is found just in front of the origin of the anterior 
branch of the artery, but another may lie in the angle between the two branches. 
The more constant one is half an inch to an inch (ca. 1.25-2.5 em.) in diameter. 
They may be absent on one side or (quite exceptionally) on both sides. The 
afferent vessels come from the abdominal muscles, the gluteus profundus, the tensor 
fasciz latee, the fascia lata; the peritoneum of the adjacent region; the pelvic bones. 
They also receive vessels from the prefemoral and coxal glands. The efferent ves- 
sels go in part to the lumbar trunk, in part to the internal iliac or deep inguinal 
glands. 
The epigastric lymph gland (Lg. epigastrica) is small and inconstant. It is situated 
on the course of the posterior abdominal artery near the pubis. It receives afferent vessels from 
the adjacent part of the peritoneum and abdominal muscles, and sends an efferent vessel to the 
deep inguinal gland. 
The paralumbar lymph glands (Lgg. paralumbales) are small and inconstant 
nodes, variable in number, which may be found under the skin of the upper part 
of the flank. Their afferent vessels come from the adjacent skin, and the efferents 
go in part to the prefemoral gland, in part to the deep inguinal gland. Hzemolymph 
glands occur in this region. 
The superficial inguinal lymph glands (Lgg. inguinales superficiales) differ in 
the two sexes. (1) In the bull they are situated below the prepubic tendon and in 
the narrow interfemoral space. They lie in the mass of fat about the neck of the 
scrotum and behind the spermatic cord, and are covered (in part) by the retractor 
of the prepuce. It is usual to find one or two on each side of the penis, but in ex- 
ceptional cases one or two more may be present. A central one above the penis 
has been observed, and there may be one further back. The afferent vessels come 
from the external genital organs (except the testicles); also from the skin of the 
adjacent region, the medial and posterior surface of the thigh, and the medial sur- 
face of the leg. The efferent vessels ascend through the inguinal canal to the deep 
inguinal gland at the side of the pelvic inlet. (2) In the cow they are usually 
termed the supramammary lymph glands (Lgg. supramammarice), since they are 
situated above the posterior border of the base of the mammary glands.2 Usually 
two are present on either side. The larger ones are in apposition medially and are 
sometimes united. The smaller glands are above or in front of the large ones. 
Exceptionally a third gland may be present or there may be only one on one side. 
The large glands are usually two or four inches (ca. 6-10 em.) long, the smaller 
ones a fourth to one-half as large. The afferent vessels come from the udder, the 
external genital organs, and part of the skin of the thigh and leg. The efferent 
vessels converge to two or three large trunks which go to the deep inguinal glands 
at the side of the pelvic inlet. 
__ 1 This gland, designated by Chauveau-Lesbre as external iliac, is here named in accordance 
with the observations of Baum, who found that it, together with the deep femoral gland, derives 
its afferent vessels from substantially the same region as the deep inguinal glands of the horse. 
* When enlarged, they can easily be felt, and when much enlarged, may produce a prominence. 
