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. 17-18. 



I 



19-20. 21-22. 



15-16. Z. radiatus (the Eayed Snail), Alder. 17-18. Z. ex- 

 cavatus (the Excavated Snail), Bean. 19-20. Z. nitidus 

 (the Shining Snail), Muller. 21-22. Z. crystallinus (the 

 Crystalline Snail), ibid. 



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. 



