68 



■ PHYSIOLOGY OF THE INVERTEBRATA. 



carries no organs — ;jaws or teeth — for the prehension or' 

 mastication of food particles. It passes by a short oesophagus- 

 (Pig. l8) into an expanded stomach, which is embedded im 





'r^-'^S' 



'S v. 



A 





b .a 

 o ^ 



< 

 z 

 < 

 u 



« 





.S rt -s^ 



O .s ■^ 



5 " £> 



■O -t5 O 



2 ? 



1 e 



2 a 



of 



O or 



i! '£ s .2. 



■Kg" 



3 S 5 S 

 o £ y .3 

 S II 1^ 



the so-called liver. At the pyloric end of the stomach a 

 diverticulum of that organ contains a rod-like body — the 

 crystalline style. The function of the crystalline style is most' 



