SYSTEMATIC INDEX. 



arbustorum. Single-banded Snail, 

 horlensis. Garden Snail, 



H. liorteusis fasciata, . 



H. hortensis unicolor, 



H. hortensis arenicola, 

 capei-ata. "Wrinkled Snail, 

 hispida. Bristly Snail, 

 Trochulus. Pyramidal Snail, 

 lamellata. Lamellate Snail, 

 aciLieata. Pi'ickly Snail, 

 pulchella. Little White Snail, 



4. ZONITES. ZONE-SXAIL, 



15. Zonites rotundatus. Radiated Zone-Snail, 



16. Zonites pygmaeus. Pigmy Zone-Snail, 



17. Zonites cellaring. Cellar Zone-Snail, . 



18. Zonites nitidulus. Nitidulous Zone-Snail, 



19. Zonites lucidus. Lucid Zone-Snail, 



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



21. Zonites radiatulus. Minute Striated Zone-Snail 



22. Zonites purus. Clear Zone-SnaU, 



23. Zonites crystallinus. Crystalline Zone-Snail, 



24. Zonites fuscus. Membranous Zone-Snail, 



5. ViTKiNA. Glassy-Snail, 



25. Vitrina peUucida. Green Glassy-Snail, 



6. SucciNEA. Amber-Snail, . 



26. Succinea putris. Oval Amber-Snail, 



A. S. putris gracilis. Slender, 



7. BULIMUS. BULIMUS, 



27. Bulimus luhricus. Glossy Bulimus, 



28. Bulimus obscurus. Lustreless Bulimus, 



8. Pupa. Chrtsalis-Snail, 



29. Pupaumbilicata. L^mbilicated Chrysalis-Snail, 



30. Pupa margiuata. Margined Chi-ysaUs-SnaU, 



9. Vertigo. "SYhokl-Sxail, 



31. Vertigo edentula. Toothless Whorl-Snail, 



10. Clausilia. Clausilia, 



32. Clausilia peiTersa. Dusky Clausilia, . 



11. Balea. Balea, .... 



33. Balea perversa. Reversed Balea, 



SECTION II. AQUATICA, 

 FAMILY III. LIMNiEINA, 



12. LiMN^us. Mud-Shell, 



34. Limnseus pereger. Wandering Mud-sheU, 



A. L. pereger ovatus. Ovate, 



B. L. pereger communis. Common, 



C. L. iDereger limosus. Brook, 



35. Limnseus palusti-is. Marsh Mud-sheU, 



36. Limnteus truncatiilus. Little Mud-shell. 



A. L. truncatulus oblongus. Common, 



B. L. tinincatulus fossarius. Ditch, 



C. L. ti-uncatulus minutus. Dwarf, 



13. Phtsa. Bubble-Suell, 



