Reptilia. 



2OI 





cavity the stomach ends 

 and is continued into 

 the intestine, which 

 pursues nearly a 

 straight course. Near 

 the posterior part of 

 the body cavity it 

 widens, forming the 

 cloaca. Alongside the 

 stomach is the long, 

 narrow liver ; from its 

 hinder end the bile duct 

 extends back to the bile 

 sac, and from this a 

 duct empties into the 

 intestine a little way 

 back of the stomach. 

 The pancreas, a pale, 

 roundish organ, also 

 pours its secretion 

 through a duct into the 

 intestine. Digestion is 

 a slow process, as might 

 be guessed from the 

 condition in which the 

 food is swallowed, and 

 the snake lies stupid 

 and inactive for a long 

 time after such a 

 " bolted " meal. 



How the Snake 

 Breathes. The right 

 lung is long and nar- 



