166 The Alligator and Its Allies 



One of these papillas as seen under fairly high 

 magnification is shown in Figure 40. 



The areolar tissue, a, forming the base of the 

 section is of about the same character as seen in 



' 



FIG. 40. The covering of the roof of the mouth of the hibernat- 

 ing animal, under fairly high magnification; a, areolar tissue; e, 

 epithelium; h, horny layer; /, fibers of horny layer. 



the section of the tongue. Less than one tenth 

 of the thickness of the entire areolar base is shown 

 in this section. 



The epithelium, e, where not thrown into papillae, 

 has also about the same character as that of the 

 anterior region of the tongue the same number 

 of cell layers and the same distinct horny layer. 



At intervals the thickness of the cellular part of 



