SYSTEMATIC INDEX. 



IX 



Genus 32. 

 Sigaretcs Lamarck. 



1. Haliotoideus p. 23, pi. II, 



f. 1,2 



2. flexalis 3, 4 



Genus 33. 

 Galericclum Brown. 



1. laevigatum p. 23, pi. XIX, 



f. 35, 38 



2. ovatum 27, 28 



3. Otis... p. 24, pi. LVII, f. 16, 17 



Family V Ianthinia. 



Genus 34. 

 Ianthina. — Lamarck. 



1. communis p. 24, pi. VIII, 



f. 1, 2 



2. exigua 16, 17 



Family VI Neritacea. 



Genus 35. 

 Natica Adanson. 



1. monilifera p. 24, pi. XIII, 



f. 1, 2, 8, 10 



2. Alderi p. 25, pi. LVII, f. 14 



.'). intricata pi. XIII, f. 13, 16 



4. Montagui 3,6 



5. glabrissima 9, 12 



6. tuberosissima 18, 20 



7. helicoides p. 130, f. 24, 25 



8. squalida p. 130 



Genus 36. 



Neritina Lamarck. 



1. fluviatilis... p. 26, pi. XIII, f. 4, 

 5, and pi. XVIII, f. 1, 2, 3 



Family VII Peristomida. 



Genus 37. 

 Paludina — Lamarck. 



1. vivipara p. 26, pi. XIV, 



f. 71, 72 



2. Achatina 68, 69 



3. impura p. 27, f. 72,* 73 



4. ventricosa 74, 75 



Genus 38. 



Assiminia Leach. 



1. Grayana p. 27, pi. XVIII, 



f. 3, 4 



Genus 39. 

 Valvata Miiller. 



1. piscinalis p. 27, pi. XIV, 



f. 62, 63, 64, 65 



2. cristata p. 28, f. 66, 67 



Family VIII Lymn^cea. 



Genus 40. 



Lymn.ea Lamarck. 



Section 1 Elongate ; volutions gra- 

 dually enlarging ; spire longer than 

 the aperture. 



1. stagnalis p. 28, pi. XV, 



f. 19, 21 



2. palustris 17, 18 



varieties... 4, 5, 7, 14, 15, 16, 23 



3. minuta 12, 13 



4. elongata p. 29, f. 1, 2, 3, 5 



LVHN.EA. 



Section 2 Subovate; body ventri- 



cose ; aperture longer than the 

 spire. 



5. auricularia p. 29, pi. XV, 



f. 29, 30, 31, 32 



peregra 8, 9, 10, 11, 36, 37, 



38, 39, 40 

 7. involuta pi. XVIII, f. 5 



Genus 41. 

 Amphipei>lea Nilsson. 



1. glutinosa... p. 30, pi. XV, f. 27, 28 



2. lacustris 24,25 



Genus 42. 

 Physa Drapernaud. 



1. fontinalis p. 30, pi. XIV, 



f. 54, 55 



2. acuta 58, 59 



3. hypnorum 60, 61 



Genus 43. 



Planokbis Miiller. 



Section 1 Volutions devoid of a 



carina, rounded on both sides ; 

 spire slightly concave. 



1. corneus p. 31, pi. XVIII, 



f. 31, 32, 33 



2. albus 52, 53 



3. lams 7, 8, 9 



4. imbricatus... pi. XIV, f. 46, 47 



and pi. XVIII, f. 11 

 Section 2 Volutions carinated. 



5. carinatus p. 32, pi. XIV, 



f. 35, 36, 37 



6. marginatus 39, 40, 41 



7. vortex 44, 45 



8. spirorbis p. 33, f. 42, 43 



Section 3— Shell shining, trans- 

 lucent ; spire deeply umbilicate ; 

 volutions provided with a slight 

 carina. 



9. nitidus 50, 51 



Section 4 Destitute of a carina; 



volutions rounded both before and 

 behind, and deeply umbilicated. 

 10. contortus 33, 34 



Genus 44. 



Segmentina Fleming. 



1. lineata... p. 33, pi. XIV, f. 48, 49 



Family IX Colimacea. 



Section 1. — Animals with two ten- 



tacula. 



Genus 45. 



Cyclostoma. — Lamarck. 



1. elegans ... p. 34, pi. XIV, f. 28 



2. roarmorea... pi. XVIII, f. 15, 15 



Genus 46. 



Carychium Miiller. 



1. minimum... p. 34, pi. XIV, f. 10, 

 and pi. XVIII. f. 15* 



Genus 47. 

 Acme -Hartmann. 



1. fusca p. 34, pi. XIV, f. 25 



2. minuta p. 35, f. 26 



Section 2. — Animals with four ten- 



tacula. 



Genus 48. 



Sdccinea Drapernaud. 



1. amphibea p. 35, pi. XV, 



f. 41, 42 



2. gracilis 34, 35 



3. oblonga pi. XVIII, f. 21 



Genus 49. 

 Achatina.— Lamarck. 

 1. acicula ... p. 36, pi. XIV, f. 82, 

 and pi. XVIII, f. 12 



Genus 50. 

 Bulimus. — Lamarck. 



1. obscurus... p. 36, pi. XIV, f. 19, 



and pi. XVIII, f. 13 



2. montanus pi. XIV, f. 22. 



and pi. XVIII, f. 14 



3. lubricus pi. XIV, f. 20 



4. acutus p. 37, f. 18 



Genus 51. 



Bal.-ea Gray. 



1. fragilis p. 37, pi. XIV, f. 11 



Genus 52. 



Claosilia Drapernaud. 



Section 1 Shell smooth; the clau- 



sium or shelly plate with a notch 

 at top, fitting into a plait situate 

 on the outer lip of the aperture. 



1. bidens p. 37, pi. XIV, f. 12 



Section 2 Shells corrugated, and 



with the clausium entire at top. 



2. biplicata p. 38, f. 13 



3. rugosa 14 



4. Rolphii pi. XVIII, f. 31 



5. dubia p. 39, f. 32 



Genus 53. 

 Pdpa Lamarck. 



1. muscorum... p. 39, pi. XIV, f. 7 



2. unidentata 4 



3. bidentata 6 



4. marginata... pi. XVIII, f. 33, 34 



5. umbilicata... p. 40, pi. XIV, f. 5 



6. Anglica pi. XVIII, f. 35, 36 



7. juniperi pi. XIV, f. 1 



Genus 54. 



Vertigo Miiller. 



Section 1. — Shells dextral, nearly 

 cylindrical; aperture externally 

 margined. 



1. edentula p. 41, pi. XVIII, 



f. 36* 



2. Pygmsea 37 



3. cylindrica 38 



4. sexdentata pi. XIV, f. 8 



5. palustris pi. XVIII, f. 39 



6. Alpestris p. 42, f. 40 



Section 2 Shell fusiform and sub- 

 cylindrical ; spiral convolutions 

 sinistral; aperture externally 

 margined. 



7. pusilla 41 



8. angustior pi. XIV, f. 9 



Genus 55. 



Azeca. — Leach. 



1. tridens p. 42, pi. XIV, f. 2 



Genus 56. 



Helix. — Linnseus. 



Snb- Genus 1. 



Helicogena — Firussac. 



1. Pomatia p. 43, pi. XVI, 



f. 6, 12, 14 



2. aspersa 5, 13, 17, 18 



3. nemoralis ... 1, 2, 3, 4, 5, 6, 7, 



8, 9, 10 



4. hortensis ... p. 44, f. 11, 12, 19 



5. hybrida ... pi. XVIII, f. 27, 2s 

 0. Arbustorum ... pi. XVI, f. 16, 



20, 21, 22 

 Sub -Genus 2. 

 Helicigona — Firussac. 



7. lapicida p. 45, pi. XVII, 



f. 9, 10, 1 1 

 Sub -Genus 3. 

 Am plexus. — Brown. 



8. pulchella pi. XIV, f. 76, 77 



9. creuella 78, 79 



Sub- Genus 4. 

 Heliceli.a Firussac. 



10. Cantiana p. 46, pi. XVII, 



f. 15, 16, 17 



11. Carthusiana 49, 50, 51 



12. rufescens .* 47, 53 



13. limbata 29, 30 



14. fulva 2 



15. fusca p 47, f. 25, 26 



16. lamellata pi. XVIII, f. 47* 



17. aculeata pi. XVII, f. 1 



18. granulata p. 48, f. 8, 13 



20. revelata 3, 4, 5 



21. sericea ... pi. XVIII, f. 43, 44 



22. hispida pi. XVII, f. 40, 46 



23. concinna... pi. XVIII, f. 45, 46 



24. depilata p. 49, f. 47, 48 



Sub -Genus 5. 

 Heliomanes — Firussac. 



25. virgata ... pi. XVII, f. 41, 42, 



43, 44, 45 



26. caperata 37, 38 



27. pisana p. 50, f. 27, 29, 32, 



33, 36, 38, 58 



28. ericitorum 21, 23, 28, 34 



Sub -Genus 6. 

 Ver TW ILL A TM. — Firussac. 



29. rotundata p. 51, f. 14, is, 



19, 20, 24 



30. pygma:a... pi. XVIII, f. 48,* 49 



31. ambilicata... pi. XVII, f. 30, 31 



Sub - Genus 7 . 

 HYALIN/E — Firussac. 



32. cellaria p. 52, f. 59, 60 



33. alliaria 48, 52 



34. nitidula pi. XVIII,* f. 1, 2 



35. lucida 3, 4 



36. radiatula p. 53, f. 5, 6 



37. crystallina 7, 8 



38. excavata 9, 10 



39. pura 11, 12 



Sub -Genus 8. 

 TRIGONOSTOMA — Firussac. 



40. obvoluta 13, 14 



