64 



PHYLLIVORA. 



" Since Limax maximus heads the list with 28,000 

 teeth, and Helix pomatia follows with 21,000, it might 

 be conjectured, perhaps, that size had some influence 

 in the matter ; but we find Helix aspersa and H. ne- 

 moralis possessing nearly the same number, while 

 Helix obvoluta — a shell very little, if at all, larger 

 than Zonites cellarius — possesses more than fifteen 

 times the number of teeth. 



