SYSTEMATIC INDEX. 6 



Pages 



7. Helix arbustorum. Single-banded Snail, . 44, 81 



8. Helix hortensis. Garden Snail, . . 44, 82 



A. H. hortensis fasciata, . . . 44, 83 



B. H. hortensis unicolor, . . 44, 83 



C. H. hortensis arenicola, . . 44, 83 



9. Helix caperata. Wrinkled Snail, . . 44, 84 



10. Helix hispida. Bristly Snail, . . 44, 85 



11. Helix Trochulus. Pyramidal Snail, . . 44,85 



12. Helix lamellata. Lamellate Snail, . . 44, 86 



13. Helix aculeata. Prickly Snail, . . 45, 86 



14. Helix pulcheUa. Little White Snail, . 45, 87 



4. ZONITES. ZONE-SNAIL, . . . . 45, 87 



15. Zonites rotundatus. Radiated Zone-Snail, . 45, 88 



16. Zonites pygmseus. Pigmy Zone-Snail, . 323 



17. Zonites cellarius. Cellar Zone-Snail, . . 45, 88 



18. Zonites nitidulus. Nitidulous Zone-Snail, . 45, 89 



19. Zonites lucidus. Lucid Zone-Snail, . . 45, 90 



20. Zonites alliarius. Garlic-scented Zone-Snail, . 45, 91 



21. Zonites radiatulus. Minute Striated Zone-Snail, 46, 91 



22. Zonites purus. Clear Zone-Snail, . . 46,92 



23. Zonites crystallinus. Crystalline Zone-Snail, . 46, 92 



24. Zonites fuscus. Membranous Zone-Snail, . 46, 93 



5. VITRINA. GLASSY-SNAIL, . . . , 46, 94 



25. Vitrina pellucida. Green Glassy-Snail, . 46, 94 



6. SUCCINEA. AMBER-SNAIL, . . . 46,95 



26. Succineaputris. Oval Amber-Snail, . . 47,95 



A. S. putris gracilis. Slender, , . 47, 96 



7. BULIMUS. BULIMUS, . . k . 47,97 



27. Bulimus lubricus. Glossy Bulimus, . . 47, 97 



28. Bulimus obscurus. Lustreless Bulimus, . 47, 98 



8. PUPA. CHRYSALIS-SNAIL, . . . . 47,99 



29. Pupaumbilicata. Umbilicated Chrysalis-Snail, 47,99 



30. Pupa marginata. Margined Chrysalis-Snail, . 47, 99 



9. VERTIGO. WHORL-SNAIL, .... 47, 100 



31. Vertigo edentula. Toothless Whorl-Snail, . 48,101 



10. CLAUSILIA. CLATJSILIA, . 48,101 



32. Clausilia perversa. Dusky Clausilia, . . 48, 102 



11. BALEA. BALEA, ..... 48, 104 



33. Balea perversa. Reversed Balea, . . 48, 104 



SECTION II. AQUATICA, . 48, 105 



FAMILY III. LIMN^INA, . 48, 105 



12. LIMX.EUS. MUD-SHELL, . . . . 48, 105 



34. Limnseus pereger. Wandering Mud-shell, . 49, 106 



A. L. pereger ovatus. Ovate, . . 49, 106 



B. L. pereger communis. Common, . 49, 107 



C. L. pereger limosus. Brook, . . 49,108 



35. Limnseus palustris. Marsh Mud-shell, . 49, 109 



36. Limnaeus truncatulus. Little Mud-shell. . 49, 110 



A. L. truncatulus oblongus. Common, . 49, 110 



B. L. truncatulus fossarius. Ditch, . 49,111 



C. L. truncatulus minutus. Dwarf, . 49, 111 



13. PHYSA. BUBBLE-SHELL, .... 49,111 



