WONDERFUL TEETH AND TONGUES 235 



in order supply their place, new teeth being 

 formed at the back to succeed the others. 



Lest any incredulous reader should disbelieve 

 the statement as to this vast number of teeth, I 



Fig. 156. Portion of palate of edible snail, 

 showing its numerous teeth 



would ask him to study the micrograph (Fig. 156) 

 of a portion of the palate or tongue of a snail with 

 its numerous rows of teeth, as seen by the micro- 

 scope. This ribbon of teeth serves as a sort of 

 rasp whereby our vegetables can speedily be cut 

 down, as every gardener knows. 



By means of these tiny and wonderful teeth 



