TRAITÉ DE 
Chitonellus, 51. 
Chlamydoconcha, 140. 
Choanomphalus, 41. 
Choristes, 85. 
Chromodoris, 100. 
Chrysodomus, 92. 
Cirroteuthis, 173. 
Clausilia, 10% 
Clavagella, 144. 
Clio, 95. 
Clione, 97. 
Clionopsis, 97. 
Cocculina, 83. 
Columbella, 92. 
Conus, 93. 
Corambe, 100. 
Cranchia, 172. 
Crassalellidæ, 139. 
Cremnoconchus, 85. 
Crepidula, 86. 
Cryptochiton, 51. 
Ctenopteryx, 171. 
Cuspidaria, 145. 
Cuvierina, 9. 
Cyclas, 140. 
Cyclophorus, 84. 
Cyclosloma, 85. 
Cyclostrema, 83. 
Cyclosurus, 84. 
Cyerce, 102. 
Cymba, 92. 
Cymbulia, 95. 
Cymbuliopsis, 93. 
Cypræa, 86. 
Cyprina, 159. 
Daudebardia, 105. 
Decapoda, 170. 
Delphinula, 85. 
Dendronotns, 99. 
Dentalium, 110. 
Dermatobranchus, 101. 
Dermatocera, 84. 
Desmopterus, 95. 
Dexiobranchæa, 96. 
Dibranchia, 170. 
Diceras, 142. 
Dimya, 158. 
Diplodonta, 139. 
Docoglossa, 81. 
Dolium, S9. 
Donax, 141. 
Dondersia, 56. 
Doratopsis, 172. 
Doridiens, 100. 
Doridium, 95. 
Doridopsis, 100. 
Doris, 100. 
Dosidicus, 172. 
Dosinia, 141. 
ZOOLOGIE 
Doto, 101. 
Dreissensia, 141. 
Eledone, 174. 
Elysia, 102. 
Elysiens, 101. 
Emarginula, 82. 
Endoceralidæ, 169. 
Enoploteuthis, 172. 
Entocolax, 87. 
Entoconcha, 87. 
Entovalva, 140. 
Eolidiens, 100. 
Eolis, 101. 
Ephippodonta, 140. 
Ethella, 75. 
Eulamellibranchia. 159. 
Eulima, 87. 
Euomphalidæ, K2, 
Euplocamus, 100. 
Euthyneura, 95. 
Fasciolaria, 91. 
Ferussacia, 104. 
Filibranchia, 156. 
Fiona, 101. 
Firoloida, 91. 
Fissurella, 83. 
Fossarus, Si. 
Fulgur, 91. 
.Gadinia, 105. 
Galcomma, 140. 
Gastrochæna. 145. 
Gastropoda, 59. 
Gastropteron, 95. 
Gena, 83. 
Glandina, 105. 
Glaucus, 101. 
Gleba, 95. 
Gomphoceratidæ, 169. 
Gonatus, 172. 
Gonialitidæ, 170. 
Gonieolis, 52. 
Goniodoris, 100. 
Guivillea, 92, 
Gymnosomes, 97. 
Halia, 92. 
Haliotis, 83. 
Halopsyche, 97. 
Harpa, 92. 
Helcion, 82. 
Helicina, 85. 
Helix, 104. 
Hemifusus, 91. 
Hemphillia, 10%. 
Herméæa, 102. 
Helerodoris, 110. 
Heteropoda, #9. 
Hipponyx, 85. 
Hippurites 142. 
Histioteuthis, 172. 
