INDEX. 419 



Principle of variation in these 

 shells, 262. Modifications of, 290. 

 Station of the family of, 262. 

 Analogies of the genera of, 267. 

 Inexhaustible profusion of, 292. 



Unioninse, the, 26.^. Characters of, 

 275. .'577. Analogies of, 285. 



Uniopsis, figure of, 288. 382. U. ra- 

 diata, 289. 



Univalve shell-fish, 21. 27. 30. Spi- 

 ral, 34. et passim. 



V. 



Valvata, 185. 196. 198. 339. 



Velotes, 347. 



Velutina, 235. 355. 



Venerinae, sub-family, 371. 



Venerupes, 376. 



Venus, 372. 



Vermes, annulose or intestinal, 27. 

 44. 52. True, completely articu- 

 lated, 38. 



Vermetus, 362. 



Vermillia, 362. 



Vertebrata, allusions to the, 1. 2. 4. 

 116. Connecting link of the Mol- 

 lusca with the Cephalopoda, or 

 cuttlefish, 5, 6. SS. Theory re- 

 specting the, 42 — 44. 50. Circle 

 of the, 49. 



Vertego, 183. 



Vesica, 360. 



Vexilla, 69. 300. 



Vitrella, 360. 



Vitrina, 190. .328. 



Vitularia, 297. 



Vpluta, of LinuEEUs, 316. V. zebra, 

 101. V. olla, 102. V. Neptuni, 

 104. 113. 116. V. angulata, 105. 

 V. magnifica, 105. V. mitis, 105. 

 V.ancilla, 106. V. scapha, 105. 

 V. fulgetrum, 108. 124. Generic 

 character, a large spire, 108. Af- 

 finities and distribution, 101— 111. 

 Creneric types of this genus, 113. 

 316. Circles of, 113. Analogies 

 of, 114. V. imperialis, and bat 

 volutes, 114. Coronated volutes, 

 115. Melons, or typical volutes, 

 67. ^9. 105. 111. 117. V. Brode- 

 ripia remarks upon, 105. 117. V. 

 Cymbium, 104. 117. V. .Ethi- 

 opica, 117. V. musicalis, 122. V. 

 fulgens, 125. The terrestrial vo- 

 lutfes, 162. 190. 192. 



Volutella, .323. 



VolutidjB, or volutes, 63. 76. Pri- 

 mary groups of, 98. 112. Analogy 



to Zoophaga, 99. 117. ; and Cas- 

 sida?, 1(X). Circle of affinity per. 

 feet, 101. Analogy of Volutinje 



_ with, 112.; of the Muricidas with, 

 112. General analogies of, 132. ; 

 to vertebrated and annulose ani- 

 mals, 1,34. Classification of, 316. 



Volutilithes, genus, 105. 112. 318. 

 Typical conformation of, 121. V. 

 musicata, 115. V. costaria, 121. 

 125. V. angulata, 122. V. ci- 

 thera, 122. V. rarispina, 123, 124. 

 Analogies of, 122. Sub-generic 

 types of, 122. 318. 



Volutin£e, are the typical volutes, 

 98. 316. Genera of, 112. Ana- 

 logies of, 112. 122. 129. 



Volvaria, 134. 326. 



Vulsella, 386. 



W. 



"Wentle-trap, common, 207. 



West Indies, Testacea, &c. of the, 

 17. 45. 180. 182. 192. 209. 



Wheel-shells, 213. 



Winkles, or Turbiuce, 195. 



Wood's Catalogue, 19. 



Worms, red-blooded, 7, 44. Gas- 

 tropod, 35. 



Xylophaga, 364. 



Zoanthus, a genus connected with 

 Radiata, 6. 



Zonites, 177. 227. .331. 



Zoology, arranged on a new basis, 3. 

 Aristotle established the first prin- 

 ciples of, 13. 



Zoophaga, the, perfection of sight 

 of, 8. Table of, 24. Carnivorous 

 shell-fish, 5.5. Respiratory siphon 

 of, 55. Eyes and tentacula, ,55. 

 Mouth, 55. Tongue, 56. Sexes, 

 56. Operculum, 56. Genera of, 

 56. Distinctions of, 59. 61. Di- 

 visions of, 62. 83. 97. Analogies 

 of, 99. Point of union with the 

 tribe Phytophaga, l.W. Families 

 of, 160. The tribe arranged, 295. 



Zoophytes, the true Acrita are con- 

 sidered as compound, 4. n. 



