FIG. 
77. Pyramis lactea .......+es0+++ 
78. Pyramis Bryerea .. 
79. Pyramis Zetlandica 
80. Pyramis denticulata......... 
81. Pyramis vitrea 
82. Pyramis virginea .........+. 
83. Rissoa graphica 

Plate X. 
1, 2, 8, 4, 5, 6, 7, 8, 9. Litto- 
rina littorea ...... 15 and 
10, 11, 12, 13, 14, 25. Littorina 
rudis 15 and 
15, 16. Littorina jugosa... 16 
and 
17. Littorina petrea... 16 and 
18, 19. Littorina tenebrosa ... 
16 and 
21. Littorina labiata... 16 
and 
16 and 
17 and 
17 
and 
16 
and 
28,29. Margarita margaritacea 
17 and 
30, 31.’ Margarita olivacea...... 
17 and 
33, 34. Littorina striatula...... 
17 and 
35. Lacuna quadrifasciata 
16 and 
36, 37. Margarita carnea 
17 and 
38, 39. Littorina fabalis... 17 
and 
20, 
Littorina dispar... 
Littorina aurea... 
Littorina Neritiforma... 
22, 
23. 
24, 
26, 27. Littorina ziczac... 
40, 41. Stylifer astericola 
10 and 
42. Phasianella pullus............ 
43. Phasianella cassior 
44, 45. Lacuna bifasciata ...... 
10 and 
9 and 
10 and 
. Lacuna vincta...... 
. Lacuna cornea...... 
. Lacuna canalis 9 and 
. Lacuna striata...... 10 and 
51. Lymnza peregra, var. 
29 and 
10 and 
53. Lacana retusa 
. Lacuna fasciata... 
Plate XI. 
4. Trochus littoralis 
3. Trochus tumidus 
8, 10. Trochus cinerarius . 
7. Trochus crassus ......... 
, 11. Troehus umbilicatus... 
15. Trochns Magus ......... 
13, 14. Trochus papillosus 
16, 17, 18, 19, 21, 22, 24, 29. 
Trochus Zizyphinus......... 
23. Trochus discrepans ... 
26. Trochus striatus 
28. Trochus exiguus 
31. 
Trochus subcarinatus . 

PAGE 
ll 
11 
1] 
11 
13 
13 
12 
128 
128 
128 
128 
128 
128 
128 
128 
128 
128 
128 
128 
128 
128 
128 
128 
128 

DESCRIPTION OF THE PLATES. 
FI@, PAGE 
Plate XII. 
1, 4, 6. Ancylus fluviatilis ... 59 
2, 18. Haliotis tuberculata ... 23 
3, 5, 7. Ancylus lacustris...... 60 
8, 9. Fissurella Zetlandica, 
Fleming eee 
10, 11. iiberncells Cireson: naaveors 61 
12, 13. Fissurella Pala 
Fleming eo 
14, 15, 16. Sipho Nosahines au, Gf 
17, 19. Emarginula fissura 62 
20. Sipho radiata 61 
21, 22. Emarginula rosea ...... 62 
Plate XIII. 
1, 2, 8, 10. Natica monilifera 24 
3, 6. Natica Montagui ......... 25 
4, 5. Neritina fluviatilis ...... 26 
7, 11. Natica nitida ............ 180 
9, 12. Natica glabrissima...... 25 
13, 16. Natica intricata......... 25 
14, 15, 21, 22, 23. Littorina 
littoralis 25 
(22, young shell. a 
17, 19. Lacuna pallidula... 25 
and 128 
18, 20. Natica tuberossissima. 25 
24, 25. Natica Helicoides ...... 130 
Plate XIV. 
1. Pupajuniperi ..............- 40 
2. Azeca tridens 42 



3. Pupa muscorum ........ 39 
4. Pupa unidentata ............ 39 
5. Pupa umbilicata ............ 40 
6. Pupa bidentata.... 39 
7. Pupa muscorum ... 39 
8. Vertigo decdartbiie sestesecer 41 
9. Vertigo angustior............ 42 
10. Carychium minimum ...... 34 
11. Balea fragilis ............... 37 
12. Clausilia bidens ............ 37 
13. Clausilia biplicata ......... 38 
14. Clausilia rugosa ............ 38 
15. Clausilia labiata, Foreign... — 
16, Clausilia papillaris, Foreign = — 
17. Clausilia plicatula, Foreign — 
18. Bulimus acutus............... 37 
19. Bulimus obscurus............ 36 
20. Bulimus lubricus ............ 36 
21. Bulimus obscurus, v. brevis 36 
22. Bulimus montanus ......... 36 
23. Bulimus obscurus............ 36 
24. Bulimus decollatus, Fo- 
LOM Mie seetoewdceclessvectactarssva) ) — 
25, Acme fusca scccchs.<c-cces SM 
26. Acme minuta 34 
27. Lymnza minuta, var. 28 
28. Cyclostoma elegans ......... 34 
29, 30. Cyclostoma lonhene 
um, Foreign... = a 
31, 32, 33. Planorbis « corneus. 31 
33,* 34. Planorbis contortus... 33 
35, 36, 37. Planorbis carinatus 32 
38, 39, 40, 41. Planorbis mar- 
ginatus .. 52 
(38a ponerkanle caeeeieintgt ) 
42, 43. Planorbis spirorbis.. 33 
44, 45. Planorbis vortex 32 

2N 



FIG. 
46, 47. Planorbis imbricatus... 
48, 49. Segmentina lineata ... 
50, 51. Planorbis nitidus ...... 
52, 53. Planorbis albus ..... 
54, 55, 56, 57, 83, 84. Bitysa 
foutinalisi ves vesecctierse-<ses 
(56 and 57, var. 1; 83 and 84, 
var. 2.) 
58, 59. Physa acuta ............ 
60, 61. Physa hypnorum 
62,63, 64,65. Valvata piscinalis 
(64 and 65, variety.) 
66, 67. Valvata cristata......... 
68, 69. Paludina achatina 

71, 72. Paludina vivipara ...... 
72,* 73. Paludina impura ...... 
74, 75. Paludina ventricosa ... 
76, 77. Helix pulchella ......... 
78, 79. Helix crenella 
80, 81. Helix fulva........ 
82. Achatina acicula ............ 
Plate XV. 
1, 2, 3, 5. Lymnza elongata. 
4, 6, 7, 14, 15, 16, 17, 18, 23, 
26. Lymneza palustris...... 
(4, 14, 15, 16, and 23, varieties; 
6 and 7, a variety with the 
apex decollated; 26, variety b 
of Drapernaud.) 
8, 9, 10, 11, 86, 37, 38, 39, 
40. Lymnza peregra 
(8, 9, 10, 11, 36, and 38, variety 
1, ovata; 10and 11, of a large 
size, found near Bury, Lan- 
cashire; 37, variety 2, ovata; 
39 and 40, variety limosa.) 
12, 13. Lymnza minuta 
19, 20, 21, 22, 23, 33. Lymnza 
stagnalis aoa 
(20 and 33, young shells; 22 ni 
23, a variety.) 
24, 25. Amphipeplea lacustris . 
27, 28. Amphipeplea glutinosa. 
29, 30, 31,52. Lymnza auricu- 
lariat ccsexs enews waka 
34, 35. Succinea i Scare 
41, 42. Succinea amphibea 
Plate XVI. 
, 2, 3, 4, 7, 8, 9, 10. Helix 
nemoralis 
(4. young shell.) 
, 18, 17, 18. Helix aspersa... 
(18, young shell.) 
, 12, 14. Helix pomatia 
(6, young shell.) 
15, 19. Helix hortensis 
20, 21, 22. Helix arbusto- 
TUM cence cvcccaccscesieccvccces 
(16, young shell.) 
_ 
or 
(=r) 
ll, 
16, 
Plate XVII. 
I. Helix-aculeatares:..:.. <->... 
2. Helix fulva oe 
8, 4, 5. Helix revelata......... 
6, 7, 12. Vitrina pellucida ... 
8, 15. Helix granulata 
, 10, 11. Helix lapicida 
o 
PAGE 

FIG. 
31|14, 18, 19, 20, 24. Helix ro- 
33 tundata.. 5 os 
833) 15, 16, 17. Helix Gantiarw: 
31 | 21, 22, 23, 28, 34. Helix erici- 
torum - - 
30 (22, young shell; 28, a AS 
| able lusus.) 
25, 26. Helix fusca.. . 
29, 32, 33, 35, 36, § 38, 58. 
Helix pisana.. 
il and 36, jee sear ) 
. Helix umbilicata 
ae 42, 43, 44, 45. Helix 
VINER ta ap adsnapan Maaevasene ce 
41 and 45, a 
28 | 32, 
26 | 
26 (32, young shell; 
27| lusus nature.) 
27/37, 39. Helix caperata 
45/40, 46. Helix hispida ............ 
45 53. Helix rufescens 
47 52. Helix alliaria .. 
36 49, 50, 51. Helix eh ees 
54, 55, 56. Helix margaritacea 
59, 60. Helix cellaria.... 
29 
Plate XVIII. 
1, 2, 3. Neritina fluviatiles ... 
(1, the operculum.) 
1,* 1.* Planorbis margiuatus, 
var. rhombeus of Turton. 
, 4, Assiminia Grayana 
Lymneza involuta....... 
; 8, 9. Planorbis levis 
10, 10. Planorbis imbricatus ... 
Achatina acicula 
28 
sow 

29 
15, 15. Cyclostoma marmorea. 
15,* 15.* Carychium minimum 
17, 18. Lymnza peregra 
21, 21. Succinea oblonga 
22, 23. ‘Succinea amphibia 
27, 28. Helix hybrida............ 
29, 30. Helix limbata..... 
31. Clausilia Rolphii .... 
32. Clausilia dubia ..... sr 
| 33, 34. Pupa marginata......... 
35, 36. Pupa Anglica 
(36, young shell.) 
36,* 36.* Vertigo edentula 
37. Vertigo pygmea ............ 
38. Vertigo cylindrica 
39. Vertigo palustris .. 
|40. Vertigo alpestris ............ 
41. Vertigo pusilla .. 
43, 44. Helix ciricea ............ 
(44, part of two volutions mag- 
nified. ) 
44/45, 46. Helix concinna 
|47, 48. Helix depilata 
44/48,* 49. Helix pygmea 
28 

28 


43 


Plate X VIII.* 


1, 2. Helix nitidula ............ 
47| 3, 4. Helix lucida ............... 
47| 5, 5,* 6. Helix radiatula ...... 
48 (5,* natural size.) 
54| 7, 8, 8.* Helix crystallina 
48 | (8,* natural size.) 
, 10. Helix excavata ......... 
PAGE 
