Obolella, *63. 
Odontostoma, 49. 
Odostomia, 19. 
Olivede, 15. 
Omalogyra, 31. 
Omphalia, 26. 
Omphalius, 36. 
Onoceras, *7. 
Ophicardelus, 45. 
Ophidioceras, *8. 
Ophileta, *34. 
Ophioceras, 8. 
Ophisthostoma, *48. 
Opistho-Branchiata, 51. 
Opisthoporus, 47. 
Orthide, 60. 
Orthoceras, *7. 
Orthoceratide, 5. 
Orthonychia, 34. 
Ostreidz, 64. 
Otina, 46. 
Paladilhea, *28. 
Palzarea, *70. 
Paleomya, *78. 
Paludina, 29. ~ 
Paludinella, 29. 
Paludinide, 29. 
Paludomus, 27. 
Parthenia, 19. 
Patellide, 39. 
Patina, 39. 
Pectinide, 64. 
Pedipes, *45. 
Peltarion, *12. 
Peplidia, 51. 
Perenna, *50. 
Perniide, 66. 
Pernopecten, *65 
Pernostrea, *64. 
Persa, 45. 
Phasianella, 35. 
Phasianema, 32. 
Phidiana, *52. 
Philippia, 33. 
Philomycus, *42. 
Philopotamis, *27. 
Pholadidz, 80. 
Phragmotheca, 64. 
Phylobranchus, *53. 
Phylloteuthis, *3. 
Physella, *45. 
Piloceras, *7. 
Pinaxia, 15. 
Pinna, *68. 
Pinniine, 68. 
Pira, 45, 
Pitharella, *43. 
Planaxis, 23. 
Platyceras, *34. 
Plecotrema, *45. 
Plectostoma, 48. 
Pleurocera, 28. 
Pleurotomaria, 37 
Plicatula, *65. 
Plocamophorus, *51. 
INDEX, 
Poeyia, *44. 
Polinices, 17. 
Pomatiopsis, 29. 
Pompholyx, *43. 
Pomus, 29. 
Poronia, 72. 
Poromya, 79. 
Potodoma, 28. 
Prasina, 69. 
Prisconaia, 71. 
Propilidium, *40, 
Proserpina, *49. 
Proserpinella, 50. 
Proserpinide, *48., 
Prosobranchiata, 13. 
Psathura, *77. 
Pseudocardium, *79. 
Pseudomelania, 20. 
Pterinea, 66. 
Pterineine, 66. 
Pteroperna, 66. 
Pteropoda, 63. 
Pterostoma, *30. 
Ptychatractus, *13. 
Ptychina, 72. 
Ptychostoma, 18. 
Pulmonifera, 41. 
Purpura, 15. 
Pupuride, 15. 
Purpurina, *18. 
Pyramidella, *19. 
Pyramidellide, 19, 
Pyramis, 36. 
Pyrgiscus, 26. 
Quenstedtia, *78. 
Quoyia, *23. 
Rapana, 15. 
Raulinia, *32. 
Rensselervia, 54. 
Rensseleria, 59. 
Rhiostoma, *47. 
Rhizochilus, 15. 
RFhodostoma, 45. 
Rhynchonellidz, 59. 
Rhynchospira, *58. 
Ribeiria, *80. 
Ricinula, 15. 
Risella, 32. 
Rissoide, 30. 
Rotella, 36. 
Rowellia, 40. 
Salterella, *63. 
Sandbergeria, 21. 
Scalaria, 26. 
Scalariadz, 26. 
Scaliola, *30. 
Scalenostoma, 20. 
Schasicheila, *50. 
Schismope, *38. 
Schizostoma, 28. 
Scissurelling, 37. 
Sidula, 45. 
Signia, 45- 
F 
Siliquaria, 25. 
Skeneide, 31. 
Skenidium, *60. 
Solaride, 33. 
Solarium, 33. 
Soleniscus, *20. 
Sophina, *41. 
Sowerbya, *78. 
Sypira, 31. 
Spiraculum, *47. 
Spiriferida, 54. 
Sportella, *73. 
Stenocisma, 58. 
Stenothyra, 29. 
Stilifer, *21. 
Stiliferide, 21. 
Stoastoma, 50. 
Stolidoma, *46. 
Strebloceras, *26. 
Strephobasis, 28. 
Strepoma, 28. 
Streptoceras, *8. 
Streptorhynchus, *6Q 
Stricklandia, 59. 
Stricklandinia, *59. 
Strophostylus, *34. 
Styliferina, *21. 
Syncera, 29. 
Syringothyris, *54. 
Taheitia, 51. 
Tanalia, *27. 
Tebennophorus, 43. 
Tectaria, 32. 
Teinostoma, *37. 
Telescopella, 28. 
Tellinide, 78. 
Tellinomya, 70. 
Terebratulide, 53. 
Terebratula, *53. 
Teredo, 81. 
Terquemia, *65. 
Tessarolax, 24. 
Tetrabranchiata, 5. 
Teuthide, 3. 
Thiatyra, 72. 
Thysaira, 72. 
Torellia, *19. 
Torinia, 33. 
Tornatellide, 51. 
Tralia, 45. 
Tremanotus, *389. 
Trematospira, *57. 
Tretoceras, *7. 
Trigoniade, 71. 
Trigonoceelia, 70. 
Trimerella, *63. 
Triplesia, 59. 
Tritoniade, 52. 
Trochocochlea, 36. 
Trochus, 35. 
Tropidoleptus, *61. 
Truncaria, *14. 
Truncatella, *50. 
Trypanostoma, 28, 
Tubifer, 23. 85 
