417 



arranged, 162. See Helix and 

 Helicidas. The lamp snails, 190. 

 Oceanic, 31. 195.210, etseq. Clas- 

 sification of, 326. 328. 



Solarium, 213. 217. 221. 352. 



Solen, 365. 



Solenella, 366. 



Soleninffi, sub-family, 365. 



Solenocurtis, 366. 



Solenymia, 366. 



Spiders, observation on, 53. 



Spirorbis, 337. 



.Spondylus, 32. .388. 



Starfish, of the class Radiata, 5. 



Stenopsis, of Guilding, 328. 



Stenopus, 190. The animal figured 

 190. 



Stomatella, 231. S. duplicata, 233. 



Stomatia, 229. Description of, 230. 

 354. Types of, 231. Analogies 

 of, 2.32. 2.34. 



Streptaxis, 165 331. 



Strepsidura, 90. 94. 308. 



Strigatella, 131. 319. 



Strombidffi, have fully developed 

 eyes, 33. 47. 55. Wing-shells, 

 63. Respiratory siphon of, 111. 

 Predacious, 136. Sub-families 

 of, 143. Typical genera of, 152. 

 156. 309. Analogies of, 154. 



Strombidea, 138. 140. 146. 310. 



Strombinee, true wing-shells, 138. 

 309. Genera of, 138, 139. 145. 

 AflSnities of, 138. 142. Analo- 

 gies of, 140. 143. 



Strombus, tuberculated, 116. Lobe 

 of the genuine, 121. 123. Typical 

 of the class, 136. S. pes-pelicani, 

 1.37. 141. S. sinuatus, 138. S. 

 latissimus, 133. S. melanosto- 

 mus, 139. S. pacificus, 139. S. 

 gigas, pink-mouthed, 139. 144. 

 S. granulatus, 139. S. goliathus, 

 the largest lip of the genus, 1.39. 

 S. gibberulus, 140. 144. S. Lu- 

 huanus, 140. 143. S. Auris- 

 Dianae, 139. 144, 145. S. suc- 

 cinctus, 144. S. lentiginosus, 139. 

 144. Analogies of the types of 

 the genus, 145. The strombi- 

 form structure, a primary type, 

 154. 310. 



Struthiolaria, 81. Relation to Mu- 

 rex, 83. Characters of, 306. 



Stuchbury, Mr., 71. n. 



Succinea, 190. 189. 328. 



Sun-shells, 216. 



Swimming of molluscous animals, 

 31. 



Syniphynota compressa, 280. 287. 



Systematic and natural arrange- 

 ment; forming Part II. of this 

 work, 295. 



T. 



Tffinioidcs of Cuvier, comprehended 

 in the annulose circle, 44. 



Tape-worms, 44. 



Tectibranchia, comprehend Bulla 

 and Aplysia, 25. 35. Form and 

 habits of, 36. Shells hid in the 

 flesh, 55. Natural group of, 58. 



247. Naked order of, 236. Ana- 

 logies of, 237. Representations 

 of, 238. Circular succession and 

 analogies of, clearly developed, 



248. Classification of, 361. 

 Tellina, 371. 



Tellinidae, 260. 369. 



Tellininffi, sub-family, 370. 



Terebellum, 137. 146. 310. 



Terebra, 302. Long spi.re of the 

 group, 74. 131. T. vittata, 74. 

 T. maculata. 302. 



Terebralia, 157. 315. 



Terebratulae, 32. Processes of, to 

 capture prey, 34. 



Teredina, .364. 



Teredo, 257. 364. 



Terms used in conchology, 391. 



Testacea, the, 3. Are a popularly 

 interesting class of molluscous 

 animals, 3. The typical Testacea 

 provided with eyes, 8. The most 

 perfect of the Mollusca, 8. Ar- 

 rangement of species of, 9. Groups 

 of the typical, as discriminated 

 by Aristotle, 13. Arrangement of, 

 by various modern naturalists, 41, 

 ef seq. Of the Caribbean seas, 

 17. Difference of the animals 

 confirms the recognised charac- 

 teristics of their shells, 18. Na- 

 tural disposition of the class, 19. 

 Table of, 20. Order I., the Ma- 

 rine, 20. Order II., the Fluvi- 

 atile,21. Order III., Terrestrial, 

 21. Merits of Lamarck and Cu- 

 vier's classifications of, 26. Ana- 

 logies of, 26. Typical character, 

 istics of, 27. ; positive and ne- 

 gative, 28. Considered anato- 

 mically, 28. Blood white, 28. ; its 

 circulation double, 29. Respir- 

 ation, 29. .55. Reproduction, 29. 

 54. Deglutition, 29. Operculum, 

 97. Nervous system of, 29. Mode 

 of progression of, 30. Power of 

 saltation, .30. Adhesion, 31. De- 

 fect of power of locomotion, 32. 

 Perforation of a permanent re- 

 sidence, 27. .32. Some cemented 

 to fixed or floating substances, 32. 

 Head, eyes, and tentacula of, .33. 

 Habits, food, and geograpliic dis- 

 tribution, 3.'). 34. 97. Primary 

 divisions of, 35. Gigantic genera 

 of, known only from tradition, 39. 



E £ 



