STUDIES IN THE PERITONEUM. 
537 
The lesser omental cavity shows no adhesions at either end. 
Huschka’s foramen admits tip of little finger, showing Spigel’s 
lobe projecting through it; Winslow’s foramen admits pencil. 
The special twist in stomach is at the pylorus. The lesser 
omentum is one inch broad and has a perpendicular fold 
raised in the center, which attaches the liver lobe to the 
pyloric end of the stomach. The ligamentum hepato-duoden- 
ale has a very sharp border. The three distinct divisions of 
lesser omentum are not sharply defined, as in man. The cse- 
cum lies on left iliac fossa curled up ; three inches long ; four 
to five times as large as any other portion of gut, is sacculated, 
and has three tenia coli; is much smaller at distal end ; it 
has a distinct and entirely free mesentery. The cascal fossa, 
superior and inferior, are present. The ascending colon lies 
in the right lumbar region ; twelve inches long, beginning at 
first colonic loop. The colonic loop next to the ilium, and 
two inches from it, is two inches long. Each of these loops 
is supplied by one artery and one mesentery. The first loop 
from the rectum begins its relation with the great omentum 
at its base, and this relation extends to the left kidney, a dis¬ 
tance of one and one-half inches. In rotating, this loop has 
be gun to displace the meso-duodenum. The next loop passed 
diagonally across meso-duodenum, appropriating it as far as 
the duodenum itself, dividing the duodenal loop into three 
segments; whereas in man it divides the duodenal loop into 
two segments. The transverse colon is one and one-hall 
inches long. It has assumed relation with the great omen¬ 
tum parallel to the pancreas, which is two inches long. The 
pancreas reaches about half way down the duodenum, which 
is six inches long. The pancreas is totally within the meso¬ 
colon and also in the meso-gaster, and is not retro-peritoneal 
in any part. The descending colon begins at the left end of 
I the spleen, where its relations have ceased with the great 
omentum. The descending colon is inserted directly in the 
I middle line of the abdomen. The descending meso-colon and 
part of the ascending meso-duodenum have coalesced. This 
has probably occurred during the axial rotation. From the 
colonic loop next to the entering ilium the colon is not sac- 
