EXPLANATION OF THE PLATES. 



319 



Fig. 



53. Clausilia bidens, and 



mouth magnified. 



54. Rolphii, and mouth 



magnified. 



55. biplicata, and mouth 



magnified. 



56. papillaris, and mouth 



magnified. 



57. labiata, and mouth 



magnified. 



58. nigricans, and mouth 



magnified. 



59. nigricans, var. dubia. 



TABLE VI. 



60. Bulimus decollatus. 



61. Goodallii, and magni- 



fied. 



62. lackamensis. 



63. hordeaceus. 



64. Pupa. 



65. Zua lubrica, and mouth 



magnified. 



66. Acicula fusca, and magni- 



fied. 



67. Bulimus acutus. 



68. cylindrus. 



69. ventricosus. 



70. Balea perversa, and mouth 



magnified. 



71. Achatina acicula, and 



magnified. 



72. octona. 



73. Succinea putris. 



74. Pfeitferi. 

 74.* Pfeifferi, var. 

 139. oblonga. 



TABLE VII. 



75. Cyclostoma elegans. 



76. ferrugineum. 



77. Carychium minimum, and 



magnified. 



78. Pupa umbilicata, shell and 



its mouth magnified. 



Fig. 



79. Pupa marginata, shell and 



its mouth magnified. 



80. Vertigo edentula, shell 



and its mouth mag- 

 nified. 



81. Pupa juniperi, shell and 



its mouth magnified. 



82. anglica, old and young 



shells and their 

 mouths magni6ed. 



83. Vertigo pygmsea, shell 



and its mouth mag- 

 nified. 



84. substriata, shell and 



its mouth magnified. 



85. palustris, shell and its 



mouth magnified. 



86. pusilla, shell and its 



mouth magnified. 



TABLE VIII. 



87. Planorbis marginatus. 



88. var. 



89. carinatus. 



90. marginatus jun. 



91. vortex. 



91*. distorted and mag- 



nified. 



92. carinatus, var. 1. 



93. nitidus. 



94. imbricatus. 



95. corneus. 



96. contortus. 



97. albus. 



98. spirorbis. 



99. Segmentina lineata 



TABLE IX. 



100. Limnseus auricularius. 



101. pereger. 

 101*. See Tab. XL 



102. scaturiginum, copied 



from Drap. 



103. Amphipeplea glutinosa. 



