VII. VITRINA. GLASS BUBBLE. 



So called from its extremely thin consistence, and 

 watery-green appearance. 



21. Vitrina pellucida. Transparent Glass Bubble . 



22. Vitrina elongata. Elongated Glass Bubble. 



VIII. HELIX. SNAIL-SHELL. 



So named from the spiral twist of the volutions. 



23. Helix nemoralis. Girdled Snail-shell. 



24. Helix hortensis. Garden Snail-shell. 



25. Helix Arbustorum. Shrub Snail-shell. 



26. Helix Carthusiana. Kentish Snail-shell. 



27. Helix Carthusianella. Chalk Snail-shell. 



28. Helix rufescens. Rufous Snail-shell. 



29. Helix sericea. Silkij Snail-shell. 



30. Helix cingenda. Banded Snail-shell. 



31. Helix virgata. Zoned Snail-shell. 



32. Helix caperata. Black-tipped Snail-shell. 



33. Helix spinulosa. Prickly Snail-shell. 



34. Helix Pomatia. Edible Snail-shell. 



35. Helix aspersa. Common Snail-shell. 

 30. Helix fusca. Brown Snail-shell. 



37. Helix Ericetorum. Heath Snail-shell. 



38. Helix nitens. Glossy Snail-shell. 



