144 



DESCRIPTION OF THE PLATES. 



PAGE 



Brochus arcuatus 125 



Brochus trachiformis 124 



Brochus reticulatus 124 



Brochus annulatus 125 



Brochus striatus 123 



1.5. Triloculina rotundata . 2 



17. Renoidca oblonga 3 



19. Triloculina minuta ... 2 



21. Triloculina glabra 2 



Mileola concentrica 3 



Biloculina elliptica 2 



Triloculina bicornis 2 



Biloculina marginata 2 



Triloculina perforata 2 



Triloculina striata 2 



Biloculina lactea 2 



Lagena perlucida 3 



31. Lagena marginata 3 



Lagena squamosa 3 



Lagena Urnse 3 



35. Lagena retorta 3 



Lagena striata 3 



Lagena globosa 126 



39. Biloculina oblonga 2 



42, 53, 54. Spirorbis spiril- 

 lum 123 



Spirorbis corneus 124 



Spirorbis annulus 124 



Spirorbis Nautiloides 123 



Spirorbis corrugatus 124 



Spirorbis granulatus 123 



Spirorbis carinatus 124 



Cornuoides major 125 



Cornuoides minor 125 



Spirorbis minutus 123 



Spirorbis re versus 124 



Spirorbis heterostrophus ... 123 



FJO. PAGE 



5G, GO. Spirorbis lucidus 124 



57. Spirorbis heterocliticus ... 123 



58. Spirorbis conicus 124 



59. Spirorbis striatulus 124 



Plate LVII. 

 srrri.KMEXTAitY. 



1. Pleurotoma Trevellianum . 127 



2. Pleurotoma gracilis 7 



3.4. Patella fulva 64 



5,0. Bulla punctata 58 



7. Scalaria Turtoni 21 



8. Lacuna Montagui 128 



9. 10. Trochus perforatus ... 18 



11. Trochus Martini 129 



12. FususBoothii 127 



14. Natica Alderi 25 



15. Trichotropis accuminata... 126 



16. 17. Galericulum Otis 24 



18. Buccinum carinatum 126 



19. Fusus Babylonicus 127 



Plate LVIH. 



1,2. Limax arboreus — 



(2, young.) 



3. Limax maximus... 55 and 131 



4.5. Limax gagates 56 



6. Limax Sowerbii 131 



7,8. Dreissina polymorpha ... 76 



(a, the byssus ; 6, the lower sy- 

 phon ; c, the upper syphon ; 

 8, the lower syphon greatly 

 magnified.) 



9, 10. Anodon Cygnea 79 



(a, the foot; 6, the upper sy- 

 phon ; c, the lower syphon ; 

 10, the lower syphon greatly 

 magnified.) 



PIG. PAGE 



11. Unio pictorum 82 



(a, the foot ; 4, the upper sy- 

 phon ; c, the lower syphon.) 



12. Pisidium obtusalc 94 



(a, the syphon; b, the foot.) 



13. Cyclas cornea 93 



(a and b, the double syphon ; c, 



the foot.) 



Plate LIX. 



1. Limax maximuB — Nilsson's 

 "Cinereo Niger" 131 



2, 3, 4, 5, 6. Limax gagates . 56 

 (3 and 6, resting position ; 4, 



young; 5, variety.) 



7,8. Limax flavus 56 



9, 10, 11, 12, 13. Limax arbo- 

 reus — 



(9 aud 13, variety; 10 and 11, 

 resting position ; 12, common 

 variety.) 



14. Limax Sowerbii 131 



16. Helix agrestis — 



17. Testacella Haliotoidea 



54 and 131 



18. Helix aspersa 43 



19. Spiculum or dart 



20. Section of ditto 



2 1 . Orifice of Helix aspersa ... 43 



22. Helix caracolla — 



23. Helix cellaria 51 



24. Clausilia nigricans 38 



2.5. Helix nemoralis 43 



26. Cyclostoma elegans 34 



27. Vitrina pellucida 54 



28. Vertigo sexdentata 41 



29. Carycium minimum 34 



30. Neritina tluviatilis 26 



31. Physa hypnorum 30 



32. Planorbis corneus 31 



33. 34, 35. Paludina vivipara . 26 

 (34, young; 35, the operculum.) 



36. Valvata piscinalis 27 



37. Aucylus fluviatilis 59 



38. Assiminia Grayana 27 



39. Succinea amphibia 35 



40. 53, 56. Spawn of Lymna;a 



peregra, var. ovata 29 



41. Eggs of Lymnaea peregra 

 magnified 29 



42. Spawn of Succinea amphi 



hia SS 



43. Eggs of Succinea amphibia 

 magnified 35 



44. Eggs of Helix Pomatia 43 



45. Eggs of Helix nemoralis ... 43 



46. Eggs of Planorbis contortus 33 



47. Spawn of Physa fontinalis. 30 



48. Egg of Physa fontinalis 

 magnified 30 



49. Spawn of Planorbis corneus 31 



50. Spawn of Paludina impura 27 



51. Spawn of Valvata cristate, 2* 



52. Spawn of Paludina impura 

 magnified 27 



54. Spawn of Lymnsea peregra 

 magnified 29 



55. Spawn of Valvata obtusa... 



57. Spawn of Planorbis margi- 

 natus magnified 32 



58. Spawn of Planorbis margi- 

 natus 32 



59. Lymnrea stagnalis 28 



60. Eggs of Limax nifus — 



SAINT ANN S Sl^IA 



