154 The Alligator and Its Allies 
a pair of thickened lips, called by Chaffanjon 
“semilunar valves.”’ 
The walls of the smaller part of the stomach are, 
as might be expected, much thinner than those of 
the larger region, but they are proportionately 
fairly thick and are internally thrown into numer- 
ous folds. 
THE INTESTINE 
In the intestine three regions may be distin- 
guished: a long, considerably coiled small intestine; 
a wide, nearly straight rectum; and a short, wide 
cloaca. 
The small intestine, Fig. 34, s, is of moderate and 
rather uniform diameter, though somewhat thicker 
near the stomach, and is not coiled so extensively as 
figured by Chaffanjon. Near the stomach it re- 
ceives the ducts of the liver and pancreas. The 
bile duct, Fig. 34, dd, is a continuation of an elon- 
gated bile sac, bs, which lies between the large right 
and smaller left lobes of the liver, J. The two 
main lobes of the liver, which appear smaller than 
in reality because of foreshortening in drawing, are 
connected, across the base of the cesophagus, by a 
narrow transverse band. 
The pancreas, pa, which is of fair size, lies 
partly dorsal to and partly in a narrow loop of the 
intestine, so that it is not very evident in a ventral 
view of the animal, 
