SYSTEMATIC INDEX. 



IX 



Vertigo. 



4. sexdentata.... p. 49, pi. V, f. 1.3 



5. palustris p. 50, f. 14 



6. Alpestris p. 51, f. 15 



Section 2 Shell fusiform and sub- 

 cylindrical; spiral convolutions 

 sinistral ; aperture externally 

 margined. 



7. pusilla p. 51, f. 16 



8. angustior p. 52, f. 17 



Geuus 20. 

 AzECA. — Leach. 



I. tridens p. 53, pi. V, f. 18 



Genus 21. 



Helix. — Linnasus. 



Sub - Genus 1 . 



Helicogbna. — Ferussac. 



1. Pomatia... p. 54, pi. VI, f. 1, 2, 3 



2. aspersa p. 55, f. 4, 5, 6, 7 



3. nemoralis .... p. 56, f. 8, 9, 10, 



11, 12, 13, 14, 15 



4. hortensis p. 57, f. 19, 20, 



21 22 



5. hybrida... p. .58, pi. V, f. 23, 24 



6. Arbustorum ... p. 59, f. 25, 26, 



27, 28 

 Sub -Genus 2. 

 Hblicigona — Ferussac. 



7. lapicida p. 60, pi. VII, 



f. 1, 2, 3 

 Sub-Gemis 3. 

 A M PLEXUS. — Brown. 



8. pulchella... p. 61, pi. VII, f. 4, 5 



9. crenella p. 62, f. 6, 7 



Sub -Genus 4. 



Helicella Ferussac. 



10. Cantiana p. 63, pi. VII, 



f. 8, 9, 10 



II. Carthusiana 11, 12, 13 



12. rufescens p. 64, f. 14, 15 



13. limbata p. 65, f. 16, 17 



14. fulva 18 



15. fusca p. 66, f. 19, 20 



16. lamellata p. 67, f. 21 



17. aculeata p. 68, f. 22 



Helix, 



18. granulata p. 69, pi. VII, 



f. 23, 24 



19. revelata 25,26,27 



20. sericea p. 70, f. 28, 29 



21. hispida p. 71, f. 30, 31 



22. concinna ..p. 72, f. 32, 33 



23. depilata .34, 35 



Sub -Genus 5. 

 Heliomanes.— Ferussac. 



24. virgata ... p. 73, pi. VIII, f. 1, 



2, 3, 4, 5 



25. caperata p. 74, f. 6, 7 



26. pisana.... p. 75, f. 8, 9, 10, 11, 



12, 1,3, 14, 15 



27. ericitorum p. 76, f. 16, 17, 



18, 19 

 Sub -Genus 6. 

 Verticilla tm — Ferussac. 



28. rotundata p, 78, f. 20, 21, 



22, 23, 24 



29. pygmsea p. 79, f. 25, 26 



30. umbilicata p. 80, f. 27, 28 



Sub- Genus 7. 

 HyALINJE Ferussac. 



31. cellaria ... p. 81, pi. IX, f. 1, 2 



32. alliaria p. 82, f. 3, 4 



33. nitidula 5, 6 



.34. lucida p. 83, f. 7, 8 



35. radiatula p. 84, f. 9, 10 



36. crystallina 11, 12 



37. excavata p. 85, f. 13, 14 



.38. pura p. 86, f. 15, 16 



Sub -Genus 8. 

 Trigonostoma — Ferussac. 



39. obvoluta p. 87, f. 16,* 17 



40. margaritacea f. 18, 19, 20 



ORDER GASTEROPODA. 



Division I Pneumobranchi^, 



Family I Limacinje. 



Genus 1. 

 ViTRiNA. — Drapernaud. 

 1. pellucida.... p. 88, pi. IX, f. 21, 

 22, 23 



