144 
DESCRIPTION OF THE PLATES. 
FIG. PAGE 
9. Brochus arcuatus 125 
10. Brochus trachiformis 124 
11. Brochus reticulatus 124 
12. Brochus annulatus 125 
13. Brochus striatus 125 
14. 15. Triloculina rotundata . 2 
16, 17. Renoidea ohlonga 3 
18, 19. Triloculina minuta ... 2 
20, 21. Triloculina glabra 2 
22. Mileola concentrica 3 
23. Biloculina elliptica 2 
24. Triloculina hicomis 2 
25. Biloculina marginata 2 
26. Triloculina perforata 2 
27. Triloculina striata 2 
28. Biloculina lactea 2 
29. Lagena perlucida 3 
30. 31. Lagena marginata 3 
32. Lagena squamosa 3 
.33. Lagena Unise 3 
,34, 35. Lagena retorta 3 
36, Lagena striata 3 
37, Lagena globosa 126 
38, 39. Biloculina ohlonga 2 
41, 42, 53, 54. Spirorhis spiril- 
lum 123 
43. Spirorhis corneus 124 
44. Spirorhis annulus 124 
45. Spirorhis Nautiloides 123 
46. Spii'orhis corrugatus 124 
47. Spirorhis granulatus 123 
48. Spirorhis caidnatus 124 
49. Cornuoides major 125 
50. Cornuoides minor 125 
51. Spirorhis minutus 123 
52. Spirorhis reversus 124 
55. Spirorhis heterostrophus ... 123 
FIG. PAGE 
56. 60. Spirorhis lucidus 124 
57. Spirorhis heterocliticus ... 123 
58. Spirorhis conicus 124 
59. Spirorhis striatulus 124 
Plate LVII. 
SUPPLEMENTABY . 
1. Pleurotoma Trevellianum . 127 
2. Pleurotoma gracilis 7 
3, 4. Patella fulva 64 
5, 6. Bulla punctata 58 
7. Scalaria Turtoni 21 
8. Lacuna Montagu! 128 
9. 10. Trochus perforatus ... 18 
11. Trochus Martini 129 
12. Fusus Boothii 127 
14. Natica Alderi 25 
15. Trichotropis accuminata... 126 
16. 17. Galericulum Otis 24 
18. Buccinum carinatum 126 
19. Fusus Bahylonicus 127 
Plate LVIIl. 
1, 2. Limax arhoreus — 
(2, young.) 
3. Limax maximus... 55 and 131 
4. 5. Limax gagates 56 
6. Limax Sowerhii 131 
7,8. Dreissina polymorpha ... 76 
(a, the hyssus ; b, the lower sy- 
phon; c, the upper syphon; 
8, the lower syphon gi-eatly 
magnified.) 
9, 10. Anodon Cygnea 79 
(a, the foot; b, the upper sy- 
phon; c, the lower syphon; 
10, the lower syphon greatly 
magnified.) 
FIG. PAGE 
11. Unio pictorum 82 
(a, the foot ; b, the upper sy- 
phon ; c, the lower syphon.) 
12. Pisidium ohtusale 94 
(a, the syphon ; b, the foot.) 
13. Cyclas cornea 93 
(a and b, the double syphon ; c, 
the foot.) 
Plate LIX. 
1. Limax maximus — 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 Sowerhii 131 
16. Helix agi'estis — 
17. Testacella Haliotoidea 
54 and 131 
18. Helix aspema 43 
19. Spiculum or dart 
20. Section of ditto 
21. Orifice of Helix aspersa ... 43 
22. Helix caracolla — 
23. Helix cellaria 51 
24. Clausilia nigricans 38 
25. Helix nemoralis 43 
26. Cyclostoma elegans 34 
27. Vitrina pellucida 54 
28. Vertigo sexdentata 41 
29. Carycium minimum 34 
FIG. PAGE 
30. Neritina fluviatilis 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. Ancylus fluviatilis 59 
38. Assiminia Grayana 27 
39. Succinea amphibia 3.5 
40. 53, 56. Spawn of Lymnsea 
peregra, var. ovata 29 
41. Eggs of Lymnsea peregra 
magnified 29 
42. Spawn of Succinea amphi 
bia 3,5 
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 cristata. 28 
52. Spawn of Paludina impura 
magnified 27 
54. Spawn of Lymnsea peregra 
magnified 29 
55. Spawn of Valvata oh tusa... 
57. Spawn of Planorbis margi- 
natus magnified 32 
58. Spawn of Planorbis margi- 
natus 32 
59. Lymnsea stagnalis 28 
60. Eggs of Limax rufus — 
FINIS. 
T. SOWLER, PRINTER, SAINT ANN’s SQUARE, MANCHESTER. 
