The Digestive System 191 
thickness of the middle muscle layer. Only one 
kind of cell is found in the gastric glands. No 
difference is to be noted between the hibernating 
and feeding conditions. 
The chief peculiarity of the small intestine is the 
apparent entire absence of the submucosa. Gob- 
let cells are also wanting. The greater diameter 
of the anterior region is due both to the greater 
diameter of the lumen and to the greater thickness 
of the walls. The middle and posterior regions 
have about the same diameter, though the mucosa 
becomes thinner and less complicated caudad. 
There is practically no difference between the 
hibernating and feeding stages. 
The anterior and posterior regions of the large 
intestine have essentially the same _ structure. 
No difference can be seen between the hibernating 
and feeding conditions. 
