61 



ZONITES. 



This is a division from that of Helix, adopted by 

 Grey and some few other conchologists, and to some 

 extent adopted by Forbes and Hanley in their " British 

 Mollusca." 



The shell is smooth, shining, fragile, spiral, and de- 

 pressed, being more or less flat, and having many con- 

 volutions. The mouth is large, lunate, and without a 

 thickening rim round the outer edge. 



The animal is large, but can withdraw itself into the 

 shell. The head is provided with four tentacles, the in- 

 ferior ones being small. 



ZoNiTES CELLARius (The Cellar Snail). MiiUer. 

 Figures 31 and 32. 



It is the Helix celaria of Miiller, Alder, Brown, La- 

 mark, Pfeifter, Rossmassler, &c. 



This shell is shining, smooth, and pellucid; it is 

 flat, of a pale yellowish-horn colour above, and on the 

 under side, around the umbilicus, is milky-white. There 

 are from five to five and a half convolutions. The size 

 varies very much in this neighbourhood, the largest 

 having been found in Mr. G. Allcock's cellar — the finest 

 specimen measuring more than half an inch in diameter. 



The habitat of Helix celaria is confined to damp 

 situations, being most abundant in cellars, drains, and 



G 



