413 



Lepton , f Turton , 366. f 



Leptospira, 176. 337. t 



Leucostoma, 173. 336. i 



Ligumia, 2()8. 274. 378. ' 



Lima, 257. 387. 

 Limacinse, 162. 329, Sub-family, 



189. 

 Limax, the genus, 10. 45. 189. 327. 



Food of, 33. Respiration, 56. 



160. First germ of limaciform 



structure, 161. Arrangement, 327- 

 Limnfea, &c.,see Limninje. 

 Limnaeus, description of, 187. L. 



stagnalis, 189. 

 LimninjB, spiral fluviatile shells, 



162. 187. 337. Analogies of, 162. 



188. 339. 

 Limpets, the structure and habits 



of, 25. 30, 31. 60. 239. 355. Fresh- 



water, 188. 

 Linnseus, error of, 9. Simplicity 



of his nomenclature, 14. System 



of, 15. On multivalves, 28. 

 Lister's Conchology, 14. 

 Lithodomus, 384. 

 Littorina, or Turbines, 206. 

 Loligo, 51. 

 Loripes, of Poli, 371. 

 Lowe, of the Mollusca of Madeira, 



18. 

 Lucernellae, 191. 193. 329, 330. 

 Lucerninse, or lamp-snails, 163. 186. 



190. 328. Circle of affinity of 



the, 194. 

 Lucerninae, or terrestrial volutes, 



162. 

 Lucidella, 192. 194. 330. 

 Lucidula, 329. 

 Lucina, 371. 



Lucternins, analogies of, 192. 

 Lutraria, 368. 

 Lymnadia alata, 280. Genus, 266. 



267. 280. 379. 

 Lyrostoma, 329. 



Macrodontes, 182. 334. 



Macrospira, 168. 171. 335. 



Macrotrachia, typical, 255,256. 362. 

 Analogies of, 258. 



Mactra, 257. 368. 



Mactrida?, 259. 



Malacology treats both of shells and 

 their inhabitants, 13. Recent in- 

 quiries as to the nature of the 

 animals, 97. Theory, 292. Glos- 

 sary, 391. 



Malleus, 385. 



Mamillaria, 345. 



Man, the Caucasian race said to be 

 the typical form of, 116. 



Margaritana, 288, 289. 382. 



Marginalii, 278, 279. 



Marginella, 97. 323. ' 



Marginellina, or date-shells 98..101. 

 133. 32,3. 



Martesia, 364. 



Medusa;, the, appertains to the Ra- 

 diata, 5. 



Megadesma, 370. 



Megadomus, cardinal teeth of, 266. 

 269. 378. M. gigas. 266. 275. 



Megalomastoma, 186. 336. 



Melacantha, 341. 



Meladomus, 340. 



Melafusus, 202. 341. 



Melampus, 182. Semi-aquatic, 196. 

 Guilding's remarks upon, 208. 

 Amphibious volutes, 343,344. 



Melania, 47. 59. 158. 341. The true, 

 199. Sub-genera : Melacantha, 

 Potadoma.Hemisinus, Melanella, 

 199. 340, 341. M. lineata, 200. 

 Analogies of, 201. 



Melaniana?, or black snails, 157. 159, 

 195. 340. Genera of, 201. 203. 

 210. 



Melanithes, fossil, 202.341. 



Melanopsis, 59. 198. 200. 341. Minor 

 types diversified, 201. Analogies 

 of sub-genera of, 203. 



Melanopsides, of Ferussac, 204. 



Melatoma, 202. 342. 



Melons, or typical volutes, 67. 99. 

 105. 111. Considered as a sub- 

 genus, 116, 117. 



Menostoma, of Blainville, 46. 



Microtoma, 74. 301. 



Mitra, the mitre-shells, 97, 98. Ty- 

 pical, 126. 129. 318. Analogies, 

 130. M. sanguisuga, 98. M. epis- 

 copalis,127, 128. M. zonata, 128. n. 

 M. terebrans, 131. M. ruffina 

 punctata, 131. M. lactea, 131. 

 MitrauEB, sub-family, 318. Spire 

 acute in, 98. Characteristics of, 

 99. 101. 126. Real type of, 112. 

 Analogies of, 129. j to the Strom- 

 bid eb, 154. 

 Mitrella, 101. 128, 129. 321. 

 Mitreola, 127. n. 129. 320. 

 Modiola, bivalve, 257. 384. 

 Mollusca, the, or soft animals, 1. 

 Their appearance unprepossess- 

 ing, 2. Division of the groups of, 

 3. Devoid of internal bone, 4. 

 Nervous system of, variable, 4. 

 Their three divisions character- 

 ised, 7. Their arrangement in 

 respect to the circle of affinities, 

 8. Lister's arrangement of, 9. 

 Mistakes in recognising the true, 

 10. On the testaceous, 26, et seq., 

 see Testacea. The parasitic, 44. 

 The Cephalopoda most resemble 

 fishes, 51. Analogies of testaceous 

 Mollusca to Annulosa, 52. Gas- 

 teropoda possess an aortic heart. 



