PEEHENSION OF FOOD. 



23 



Certain animals introduce the food into the mouth by 

 means of a long and protractile tongue. In others, this 

 act is accomplished by means of a prolongation of the 

 nose, as in the elephant (Fig. 7) j or by means of feelers 



Fig. 7. Head of the Asiatic Elephant. 



(palpi) surrounding the mouth, as in insects (Fig. 8), 

 whilst similar organs are called tentacula in the mollusca 

 (Fig. 10), the polyps (Fig. 4), Ac. ^ 



48. The prehension of the liquid aliments or drinks 

 is effected in two ways. Sometimes the liquid is poured 



Fig. 8. Jaws of the 

 Beetle. 



Fig. 9. Carabe, a Beetle. 



into the mouth, and allowed to fall into it by its own 

 weight; in others, it is sucked up by the mouth, either 

 by the dilatation of the thorax or by the action of the 



