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 

 (Fig. 1 8) into an expanded stomach, which is embedded in 



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 



