110 



The animal, according to the observations of Professor Forbes, presents 

 differences in different species, which in some families have been regarded 

 of sufficient importance for the distinction of genera. The siphons are 

 described as being either separate and diverging, or partially or even en. 

 tirely divided. 



1. Africana, MiihJf. 



2. affiais, Sow. 



3. agrestis, Phil. 



4. albina, Sow. 



5. albo-radiata, id. 



6. alta, id. 



7. Amathusia, Phil. 



8. aphrodina, Lam. 



9. asperrima, Sow. 



10. Astartoides, Phil. ? 



11. australis, Sow. 



12. Berryi, Gray. 



13. Californiensis, Brod. 



14. callosa, Conrad. 



15. calophyla, Hani. 



16. cancellata, Linn. 



17. Cardioides, Lam. 



18. casina, Linn. 



19. Chernnitzii, Hani. 



20. cincta, Chemn. 



21. cingulata, Lam. 



22. cingulina, ? 



23. Cochinensis, Thorpe. 



24. Columbiensis, Sow. 



25. compta, Brod. 



26. corbis, Lam. 



27. cor, Soto. 



28. costellata, id. 



29. costellifera, Ad. 



30. crebrisulca, Lam. 



31. crenifera, Sow. 



32. crenulata, Chemn. 



33. Cumingii, Sow. 



34. Cypria, id. 



35. decipiens, Zr«tt£. 



36. declivis, Sow. 



37. decorata, ifroc/. 



Species. 



38. discina, Za#i. 



39. discrepans, Sow. 



40. donacina, Chemn. 



41. dysera, i(/. 



42. elegans, Ad. 



43. encausta, ? 



44. exalbida, Chemn. 



45. fasciata, Bon. 



46. flexuosa, Z«««. 



47. fluctifraga, Sow. 



48. foliacea, P/«7. 



49. foveolata, Sow. 



50. fumigata, id. 



51. gallina, Zzm». 



52. gallinula, Lam. 



53. gemma, Tolten. 



54. Gnidia, 5?-oc?. ^ /Sow. 



55. grauulata, Gmel. 



56. granulifera, Sow. 



57. gravesceus, Menke. 



58. histvionica, &>«?. 



59. incompta, P/«7. 



60. imbricata, Sow. 



61. inter secta, id. 



62. Kellettii, iKwfe. 



63. Kochii, Phil. 



64. Labuana, -4c??ra. 



65. lacerata, Hani. 



66. laevigata, Sow. 



67. Lamarckii, Gra^. 



68. lamellata, Lam. 



69. laqueata, 5ow. 



70. Lemannii, Payr. 



71. lenticularis, Sow. 



72. Listeri, Cr/vry. 



73. lyra, Hani. 



74. macrodon, Z«?«. 



75. magnifica, Sow. 



76. marica, Linn. 



77. mercenaria, ie?. 



78. minuta, Koch. 



79. monilifera, £020. 



80. multicostata, id. 



81. nodulosa, id. 



82. oblonga, Gray. 



83. ornatissima, Brod. 



84. ovata, Pewrc. 



85. Paphia, Linn. 



86. parva, Sow. 



87. paupercula, Chemn. 



88. pectmula, Z«?«. 



89. pectorina, irf. 



90. Pevonii, id. 



91. Peruviana, Sow. 



92. plicata, 6r»^. 



93. polita, Quoy. 



94. praeparea, <SV/y. 



95. puerpura, Linn. 



96. punctifera, Gray. 



97. pygmea, Za?ra. 



98. quadrangularis, Ad. 



99. radiata, PM. 



100. resticulata, Sow. 



101. reticulata, Linn. 



102. rigida, Billw. 



103. roborata, ZTaw/. 



104. rosabna, Rang. 



105. rostrata, >&w. 



106. rugosa, Gmel. 



107. scabra, Hani. 



108. scalarina, Za;w. 



109. simillima, $w. 



110. sinuata, Turt. 



111. spkserisulca, Deah. 





