182 The Alligator and Its Allies 
regions of the intestine may be seen by comparing 
Figures 47, 48, and 49. 
The serosa, s, which is of about the same character 
in the three regions under discussion, is a distinct 
and fairly dense layer 
of connective tissue 
with numerous blood- 
vessels. 
The general appear- 
ance of the mucous 
membrane as a whole 
is sufficiently clear in 
the low-power draw- 
ing described above, 
so that all that need 
Fic. 48. An outline of a trans: be shown under a 
section of the wall of the middle higher magnification 
region of the small intestine of the 
hibernating animal, under low magni- is the epithelium (Fig. 
fication; lettering as in Figure 42. 50). The upper part 
of this figure repre- 
sents the lower end of one of the intestinal 
glands cut longitudinally, below which is the 
end of another gland in transverse section. Be- 
tween the two sections is the compact tunica 
propria of lymphatic tissue. 
The section from which this particular figure 
was drawn was in the anterior region, but the 
corresponding part of a section in either of the 
other regions would have practically the same 
appearance. 
