The Digestive System 179 
lumen. The cells are of the same general character 
as in the more distal parts of the gland except 
that they are somewhat more columnar or py- 
ramidal than in the body of the gland. The nuclei 
of the body and fundus are usually somewhat larger 
and more nearly spherical than in the columnar 
cells of the duct. 
The feeding animals from which tissues were 
taken were considerably smaller than the hiber- 
nating specimen, so that the stomach walls were 
proportionately thinner; but, so far as could be 
discovered, there was no difference in structure. 
The relative thickness of the entire wall in each 
of the three regions sectioned was about the same 
as described above. 
As has been said, the mucosa or the pyloric or 
small region of the stomach from the hibernating 
animal was so poorly fixed that its structure could 
not be made out. In the feeding stage the mucosa 
of this region was as well fixed as any of the other 
tissues and showed that its structure is essen- 
tially like that shown in Figure 46, except that the 
glands are proportionately not quite so long as 
in the fundic and cardiac regions, and are 
somewhat more open—that is, they have wider 
lumina; their lining cells are all of one kind and are 
unchanged from what was seen in the hibernating 
condition. 
The Small Intestine. Three regions of the small 
intestine will be described: (1) an anterior, just 
