Shells of Common Occurrence. 141 



half depressed whorls. The shell of the Zonites 

 cellarius, a cellar snail (Figs. 7 and 8), is also 

 shining, smooth, and pellucid, and of a pale yel- 

 lowish horn-colour. It is found in cellars, drains, 

 and shady courts, in fields and woods, under stones, 

 and amongst grass. The shell of the garlic snail 

 [Zonites alliarius, Figs. 9 and 10), is nearly flat, 

 and more convex, yellower in colour, but equally 

 pellucid, smooth, polished, and fragile. Some of 

 these creatures have, when alive, a strong odour of 

 garlic, some have it on being plunged in hot water 

 (which is the readiest way of killing them for the 

 shell), though not when alive. Its numbers in our 

 bag, as swept down a river, are somewhat extra- 

 ordinary. 



The little Zonites nitidulus (Figs. 11 and 12), 

 takes from its shell the name of little shining snail. 

 A deep umbilicus is seen in the shell. The animal 

 is also called the " dull snail/' from its leaden 

 colour; but the shell, three-tenths of an inch in 

 diameter, is of a yellowish horn-colour, and very 

 like Z. cellarius. Another of these small shells, the 

 delicate snail, Z. purus (Figs. 13 and 14), is only 

 two lines or less in diameter ; it is not very 

 common, but, like the rest, smooth, glossy, and 



transparent, and may be known by its mouth, 



in 



