Vlll. 



Family II. — Pectenides. 



Pagx. 



Genus 19. Plieatula, Lamarck 150 



20. Plagiostoma, Lluyd 150 



21. Dianchora, Sowerby 152 

 23. Hinnus, Defrance ... 153 



23. Pecten, Bruguiere ... 153 



24. Lima, Bruguiere ... 158 

 Sub-Genus. Limatula, S. Wood 159 



Grand Division III. 



Tribe I.— Mallacea. 



Genus 25, Avicula, Lamarck ... 159 



25. Pterinea, Goldfuss... 164 



26. Monotis, Bronn 164 



27. Genillea, Defrance.. 164 



28. Crenatula, Lamarck. 16S 



29. Catillus, Brongniarte 165 



30. Posidonia, Bronn ... 168 



31. Pema, Bruguiere ... 168 



Tribe II. — Mttilacea. 



32. Pinna, Linnseus 169 



83. Dreissina, Van Beni- 



den 170 



34. Mytilus, Linnaeus. ... 170 



35. Modiola, Lamarck ... 171 



36. Litliodomus, Cuvier. . 257 



Order II.— DIMYARIA. 



Grand Division I. 

 Tribe 1. — Chamacea. 

 1. Chama, Braguiere ... 176 

 2 Caprina, D'Orbigny ... 176 



Grand Division II. — Lamellipedes. 

 Tribe 1. — Natades. 

 3. Anodon, Bruguiere... 176 



Page. 

 Genus 4. Unio, Bruguiere 176 



5. Alasmodon, Say 181 



Tribe II.— Teigonacea. 



6. Trigonia, Bruguiere .. . 181 



7. Nucula, Lamarck 184 



8. Pleurodon, S.Wood... 168 



9. Pectuneulus, Lamarck 188 



1 0. Macrodon, Lycett ... 190 



11. Area, Linnseus 190 



12. Cuculla?a, Lamarck .. 192 



13. Axinus, Sowerby ... 104 



Family IV. — Cardiacea. 



1 4. Pachymya, Sowerby. 1 95 



15. Hippopodium, Cony- 



beare 195 



16. Megalodon, Sowerby 196 



17. Isocardia, Lamarck .. 196 



18. Cardiomorplia, Ko- 



ninck 197 



19. Opis, Defrance 197 



20. Spha;ra, Sowerby ... 197 



21. Edmondia, Koninek. 198 



22. Cypricardia, Lamarck 198 



23. Cardium, Linnjeus... 199 



24. Pleurorhyncbus, Phil- 



lips 201 



25. Cardiola, Broderip... 202 

 2G. Myoconcha, Sowerby 202 



Family V. — Conchacea. 

 Sub-Division I. — Marine. 



27. Venericardia,Lamarck 202 



28. Pullastra, Sowerby... 203 



29. Venus, Linnaeus 204 



30. Cytherea, Lamarck.. 205 



Page. 

 Genus 31. Artemis, Poll 207 



32. Cyprina, Lamarck ... 207 



Sub-Division II. — Flcviatile. 



33. Cyrena, Lamarck ... 208 



34. Cyclas, Bruguiere ... 209 



35. Piscidium, PfeifFer... 109 



Grand Di\ision III.— Tencipedbs. 



Tribe I.- -Nymphacea. 



Sub-Division I. 



36. Astarte, Sowerby ... 210 



37. Cardinia, Agassiz ... 218 



Sub-Division, II. 



38. Donax, Linnseus 214 



39. Trigonellites, Parkin- 



son 214 



40. Lucina, Bruguiere ... 21 S 



41. Corbis, Cuvier 216 



42. Tellina, Linnseus ... 216 



43. Areopagia, Leach ... 218 



Sub-Division III.^Solenaires. 

 Genus 44. Psammobia, Lamarck 218 

 45. Sanguinolaria, ditto. 219 



Tribe II. — LiTHOPHAGi. 

 Genus 46. Petricola,Lamarck... 220 



47. Sphenia, Turton 222 



48. Saxicava, Lamarck... 221 



49. Agina, Turton 221 



Tribe III. — Coreulacea. 

 Genus SO. Pandora, Bruguiere.. 221 



51. Corbula.Bruguiere ... 221 



52. Nsera, Gray 223 



Page. 

 Genus 53. Potomomya, J. Sow- 

 erby 223 



Family IV. — Mactracea. 

 Genus 54. Amphidesma, La- 

 marck 225 



55. Crassatella, Lamarck 225 



56. Tellimya, Brown ... 225 



57. Montacuta, Turton... 225 



58. Thetis, Sowerby 225 



Sub-Division III. 

 Genus 59. Mactra, Linnteus ... 226 

 60. Mactrina, Brown ... 226 

 6L Lutraria, Lamarck... 226 



Grand Didsion IV. — Crassipedes. 



Family I. — Mvaria. 

 Genus 62. Mya, Linnaius 228 



63. Thracia, Leach 229 



64. Anatina, Lamarck ... 229 



65. Lysianassa, Miinster. 229 



Tribe II. — Solenides. 

 Genus 66. Solemya, Lamarck... 230 



67. Panopa;a, Menard .. . 230 



68. Solen, Linnseus 281 



69. Pholadomya, J. Sow- 



erby 231 



Family III. — Pholadaria. 

 Genus 70. Pholas, Linn^us ... 233 



Family II. — Tudicola. 

 Genus 71, Gastrochaena, ^Spen- 



gler 234 



72. Teredina, Lamarck. . 234 



73. Teredo, Linnajus ... 235 



74. Fistulaua, Bruguiere 236 



CLASS THIRD. 

 CIRREPEDA, OR BARNACLES 



Order I.— PEDUNCULATA. I Order II.-SESSILIA. 



Genus 1. PoUicipes, Leach ... 236 [Genus I. Balanus, Lamarck ... 237 



Genus 2. Adna, Leach 237 I Genus 4. Coronula, Lamarck. . 233 



3. Clitia, Leach 238 



CLASS FOURTH. 

 ANNELIDA, 



Order I.— SEDENTARIA. I Genus 2. Vermilia, Lamarck... 241 



Family I. — Serpulacea. 3. Spirorbis, Lamarck... 242 



Genus 1. Serpula, Linna;us ... 238] 4. Cyclogyra, S. Wood . 242 



Genus 5. Comuoides, Brown... 242 

 6. SerpuliteSjMurchison 242 



Family II. — Maldam.e. 

 Genus 7. Dentatum, Linnseus. 243 



