394 



ORGANS OF DIGESTION. 



(Fig. 126. A. B.) The wide expanded jaws, covered with sharp 

 horny sheaths, adapted to cut the coarse vegetable food,are mov- 

 ed by strong muscles, and the short, fleshy, undivided tongue 

 is covered with long, delicate, sheathed papillae, which are seen 

 likewise on the upper part of the oesophagus. The mouth 

 is abundantly furnished with muciparous glands, and the sali- 

 vary glands, especially the submaxillary, are very differently 

 developed in the different species. The long and muscular 



FIG. 126. 



resophagus is still wide, as in other reptiles, from the undi- 

 vided condition of the food, and it presents internally nu- 

 merous longitudinal folds of the mucous coat, which are seen 

 also extending along the thin cardiac portion of the stomach. 

 The longitudinal plicae of the inner membrane are percep- 

 tible, though smaller, along the thick, muscular, pyloric part 

 of the stomach. The stomach (126. A. i.) is extended trans- 

 versely from left to right, of great strength and capacity, 

 and behind the two expanded lobes of a large and broad 



