176 The Alligator and Its Allies 



the oblique layer by a considerable layer of con- 

 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, Im, 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- 







Fig. 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. 



