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 tt 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, 
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