411 



Eulima. 343. 



Eyes, of the Testacea, 8. 33. 97. 

 Of the Cephalopoda, 8. 



Fasciolae, 37. Cup-shaped 'suckers 

 of the, 38. Food of, 46. ' 



Fasciolaria, 76. 94. Characters, 303. 



Ferussac, baron de, his work on 

 the terrestrial MoUusca, 18. 171. n. 



Ficula, characters of, 85. 307. F. 

 caudata, 85. F. rapa, 85. 



Firula, 46. 



Fishes, the Cephalopoda, among the 

 Mollusca, bear greatest resem- 

 blance to, 51. 



Fissurella, 58. 62. 240. Description 

 of, 243. 355, 356. 



Fistulana, 363. 



Foot or belly of molluscous animals, 

 30. 134. 



Foraminata, cephalopodous, 43. 



Foraminifera, investigated by the 

 microscope, 44. Organisation of, 

 45. 



Fossils, arguments founded on 

 those of testaceous genera now 

 extinct, 40. Those of the larger 

 reptiles, 41. Of Cephalopoda, 48. 

 Of TurbinellinEe, 77. Of Cones, 

 149. Snails, 196. 



Fragella, Sm'., 352. 



Freshwater and fluviatile Testacea, 

 33. 



Fusing, or spindle-shells, 76. 87. 90. 

 154. Delicate and elegant, 89. 

 Analogies of Pyrulinffi;to, 92. ; of 

 Turbellinas to, 93. Sub-genera 

 of, 308. 



Fusus, the typical genus, 87. 90. 

 308. Fossil, 77. F. bulbiformis, 

 90. F. ficulneus, colossus, coro- 

 natus, 91. F. colus, 96. Affinities 



,' of this group, 154. F. strombi- 

 formis, typical, 154. F. Syracu- 

 sensis, 154. 



Galeomma, 2.57. 376. 



Gasteropoda, of Lamarck, 24. Of 

 Cuvier, 25. Anatomy of the, 29. 

 Progression of, 30. Eyes and 

 head of, 33. Phytophagous, 33. 

 The spiral univalves eminently 

 typical, 34. 47. Developement 

 of the perfect spire, gradual, 47. 

 Analogies with the rest of the 

 animal kingdom, 49. Primary 

 divisions, 53. Analogies of the 

 MuriciUcE and Turbinellidee, .53. 

 Of Gasteropoda and Testacea, 60. 



Of the zoophagous and phyto- 

 phagous classes. 111. 160. 195. 228. 

 Aberrant tribes of, 239. Analogies 

 of phytophagous and carnivorous, 

 242. 



Gasteropteron, 248. 252.362. 



Gastrochina, 257. 363. 



Generation of Moilusks, 29. 292. ^'^ 



Generalisation, remarks on, 290. 



Geographic distribution of Tes- 

 tacea, 34. 



Geologv, its relations with con- 

 cholo'gy, 9. 12. Fossils of the 

 Paris basin, 77. Of Hordwell 

 Cliff, 77. 



Geomitra, Terrestrial, 166. 332. 



Geotrochus, conical spire of, 163. 

 331, 332. Sub-genera ef, 166. 



Geovula, group of, 208. 344. 



Gervillia, 385. 



Gibberula, Sw., 323. 



Glabella, 133. 324. 



Glauconome, 366. 



Globularia, 345. 



Glycimeris, 369. 



Gnathodon, 370. 



Gonidomus, 166. 332. 



Gonospira, 168. 333. 



Goniostoma, 177. 181. 335. 



Gryphffia, 389. 



Guilding, Rev. Lansdown, on the 

 Mollusca of the Caribbean Seas, 

 17. 182. Drawings by, 18. n. 180. 

 Discoveryof Herpaby, 4,5. Draw- 

 ing of a species of Nassa, 69. 



H. 



Haliotidfe, the. 111. 556, 354. Con- 

 formation of, 159. 228. Circular 

 group of the, 231. 



Haliotidea, Stv., 354. 



Haliotis, or ear-shell, 25. 30. Cha- 

 racters of. 111. 2.30. 354. The 

 animal, 229. H. asinina, 231. 



Harpa, the harp-shclls,66. 298. 



Harpula, genus, 102. 134. 317. H. 

 vexillum, 71.106.119. H.hebraca, 

 106. H. fulminata, 107, 108. 119. 

 12,5. H. bullata, 107. 119. II. ly- 

 riformis, 107. 119. H. costata, 



119. II. nucleus, 119. H. poly- 

 zonata, 119. H. musica, 119. H. 

 sulcata, 119. H. Lapponica, 120. 

 Mr. Broderip's Observations on 

 II. dubia, 120. n. Sub-generic 

 tvpes, 120. 122. Analogies of, 



120. 122. 



Harpula costata and multicostata, 



119. 121. 

 Haustellaria, 296. 

 Ilectocotyles, of Cuvier, 46. 

 Helicella;, 164. 194. Their disk-like 

 ^ shells, KM. 333. Broad-lipped, 191. 



