412 



INDEX. 



Helicida?, analogies of, 111. Land 

 and freshwater snails, 158. Prin- 

 ciples of investigating this tribe, 



160. 291. The only division of 

 Testacea breathing atmospheric 

 air, 161. Circular group of, 161. 

 Network of pulmonary vessels in, 



161. Tentacula of, 161. Chief 

 families described, 162. 186. Ana- 

 logies of, 162. 227. Sub-families 

 of, 162. Classification of, 326. 



Helicinas, or testaceous snails, 56. 



162. 330. 336. Are typical, 163. 

 Group extensive, 184. 194. 



Helicogena, of Ferussac, 191. 



Helisoma, 337. 



Helix proper, description, 164, 165. 

 227. 330. H. hortensis, 164. Ana- 

 logies of, 166. Sub-genera of, 166. 



Hemicardium, 373 



Hemicycla, 164. 193. 



Hemidonta, 288. 381. 



Hemifusus, 91. 94. 



Hemimactra, 369. 



Hemimitra, 199/342. 



Hemiodon, genus, 191. 330. Toothed 

 aperture of, 164. 194. 



Hemisinus, 200. 341. 



Hemitoma, sub-genus, 244. 356. 



Hemitrochus, with elevated spire, 

 165. 331. 



Herpa, genus of soft Mollusca, dis- 

 covered by Guilding, 18. 45. 161. 

 189.327. App.405. 



Heteropoda, divided into Cari- 

 naria, Pterotrachia, and Phylli- 

 roe, 25. By Cuvier, into Firoles 

 and the Carinarije, 25. 48. 



Hiatula, 101. 132. 322. 



Hinnites, 388. 



Hipponyx, 31. 58. 240. 244. 357. 



Hippopus,<47. 257. 374. 



Horce Entomologies, notes on the 

 Testacea in the, 19. 



Humphrey, George, F.L.S., system 

 of conchology by, 15. His ar- 

 rangement compared tabularly 

 with Lamarck's, 20. Order I., 

 Marine Testacea, 20. Order II., 

 Fluviatile, 21. Order III., Ter- 

 restrial, 21. His enumeration of 

 univalves, 22. 



Hybrids, non -production of, 292. 



Hyria, its connection with Unio, 

 264. 285. 380. 



Hyria avicularis, 263. 278. H. cor- 

 rugata, 263. 284. 



Hyridella, 380. 



Hyrina?, sub-family of, 282. 378. 

 Analogies of, 285. 



lanthina, or oceanic snail, 31. 195. 



Inferobranchia, of Cuvier, 25. 



Infusoria, 4. 



Inoceramus, 385. 



Intestina, heterogeneous class of, 



Iridea, its affinity to Mysca, 283. 

 Remarks on, 284. 379. 



Iridinina, 257. 262. 380. Prox- 

 imate to Anodon, 264. Typical 

 species of, 286. I. Nilotica, 286. 

 I. elongata, 291. 



Iridinina;, sub-family, 286. 380. 



Isocardia, 374. 



Johnson, Dr., of Edinburgh, his 

 valuable labours on the soft Mol- 

 lusca, 43. n. 



K. 



Klein, 'his ornithological cabinet, 

 9. 11. Conchological labours of, 

 14. 



Lacuna, 241. 



Laevicardium, 373. 



Lamarck, his arrangement of the 

 Testacea, 15, 16. 26. Compara* 

 tive Tables, 20. First Order of 

 Lamarck : Conchiflres dimyaires, 

 22.; tenuipedes, 22.; lamelli- 

 pedes, 23. ; ambigus, 23. His se- 

 cond order: Conchiferes mono, 

 myaires, 23. : Branchiopoda, 23. 

 His division of Mollusca into five 

 orders, 23. ; Pteropoda, 23. ; 

 Gasteropoda, 24. ; Trachelipodes, 

 4 ; Cephalopodes, 24. ; Hetero- 

 poda, 25. 



Lamprodoma, 132. 225. 321. 



Lamproscapha, genus, 287. 381. 



Lamprostoma, 350. 



Lanistes, 384. 



Lanites, 339. 



Latiaxis, 82. 306. 



Ligumia recta, 291. 



Leiodomus, 69. 74. 302. 



Leiostoma, analogies of, 192. Cha- 

 racters of, 308. 328. 



Leiostomus, 90. 94. 



Leptolimnea, 338. 



Leptoconus, 312. 



