SYSTEMATIC INDEX. 



IX 



Vertigo. 



4. sexdentata .... p. 49, pi. V, f. 13 



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 



Genus 20. 

 AzECA Leach. 



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



Genus 21. 



Helix. — Linnasus. 



Sub - Genus I . 



Helicogena. — 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. 

 Helicigona — Ferussac. 



7. lapicida p. 60, pi. VII, 



f. 1, 2, 3 

 Sub -Genus 3. 

 Amplexus. — 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. 

 HbliomANES. — Ferussac. 



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



2, 3, 4, 5 



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



26. pisana.... p. 7.5, f. 8, 9, 10, 11, 



12, 13, 14, 15 



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



18, 19 

 Sub- Genus 6. 

 Verticillatm 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 — Pneumobranchls. 



Family I — Limacin^. 



Genus 1. 



ViTRiNA Drapernaud. 



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

 22 23 



