176 The Alligator and Its Allies 
the oblique layer by a considerable layer of con- 
Fic. 45. A transsection 
through the wall of the pyloric re- 
gion of the stomach of the feed- 
ing animal, under low magnifi- 
cation; m, mucosa; om, oblique 
muscles; other letters as in Fig- 
ure 42. 
nective tissue like that of 
the submucosa. 
The oblique layer, om, 
even in this section of the 
pyloric region is the thick- 
est of the three muscle 
layers; while in the car- 
diac, and especially in the 
fundic, regions it is of 
great thickness, as was 
noted above, and is made 
up of larger bundles with 
less intervening connec- 
tive tissue. 
The outer or longitud- 
inal muscle layer, lm, is 
comparatively little de- 
veloped and consists of 
small rather scattered 
bundles of muscles with 
a correspondingly large 
amount of connective tis- 
sue. This connective 
tissue passes insensibly 
into that of the surround- 
ing serosa, s, a loose, vascular layer of varying 
thickness and density, shown very thick in Figure 
45, but often much thinner. 
So far as could be determined, the mucous mem- 
