142 Beautiful Shells. 
which is placed obliquely. It cannot well be con- 
founded with Z. radiatus, the rayed snail shell 
(Figs. 15 and 16), for that, although polished, 
shining, and pellucid, is regularly striated or 
wrinkled, and is horn or amber coloured, and two 
lines in diameter. Z. excavatus (Figs. 17 and 18) 
is a quarter of an inch shell, of which there are 
multitudes in our bag, found under felled timber 
© & 
15-16. 
OPES 
A 
KA 
i SI 
i} 4 
R \ 
wm S 
19-20. 
15-16. Z. radiatus (the Rayed Snail), Alder. 17-18. Z. ex 
cavatus (the Excavated Snail), Bean. 19-20. Z. nitidus 
(the Shining Snail), Miller. 21-22. Z. crystallinus (the 
Crystalline Snail), cbid. 

and decayed wood. Z. nitidus, the shining snail 
(Figs. 19 and 20) is likewise pellucid, the colour 
being brownish horn, its diameter a quarter of an 
inch. In pine-beds and damp hothouses, where it 
is found largely congregated, sad havoc is per- 
petrated by this tiny snail. The Z. crystallinus of 
Muller (Figs. 21 and 22) scarcely exceeds an eighth 
of an inch in diameter, and occurs amongst decayed 
leaves and stones. 
