INDEX TO GENERA AND SUBGENERA OF MOLLUSCA. 



Parascutum, 55, no. 

 Parisiella, 14. 



Parmophoriis, see Capulus, Scutum, 

 Parvicorbis, 10, 114. 

 Parviscala, 26. 

 Parvisipho, 45. 

 Paryphostoma, 32. 

 Pass3'a, 12. 

 Patella, 20. 

 Pecten, see Chlamys. 

 Pectiincu/aria, see Limopsis. 

 Pectunculiis , see Axinaea. 

 Pedipes, see Traliopsis, Marinula. 

 Pelecypoda, 1, 61. 

 Pella, see Acanthinula. 

 Peloronta, 24. 

 Penion, 45. 

 Peratotoma, 53, 113. 

 Periaulax, 22. 

 Peristernia, 46. 

 Perna, 18, 63. 

 Peronaea, 4. 

 Phredusa, 57. 

 Phasianella, 23. 

 Philine, 54. 



Phlyctcvnia, see Phlyctis. 

 Phiyctis, 50, 113. 

 Pholadomya, 3. 

 Phorculus, 22. 

 Phoriis^ see Xenophora. 

 Physa, 55. 

 Pinna, 17, 63. 

 Pileolus, see Tomostoma 

 Pileopsis, see Capulus, Hipponj'x. 

 Pirena, see Faunus. 

 Pirenopsis, 34. 

 Pirula, 42. 

 Pirula^ see Sycum. 

 Pisanella, 46. 

 Pisania, 45. 



Pisidium, see Sphcerium. 

 Pitar, 6, 62, 112. 

 Plactina, see ^emiplicatula. 

 Plagiarca, 16. 

 Plagiocardium, g. 

 Planaxis, 37. 



Planikellya, see Planikell3'ia. 

 Planikellyia, 13. 

 Planimodiola, 17. 

 Planorbis, 55, 70. 

 Planorhis, see Valvata. 

 Platychilus, see Simochilus. 

 Plesiastarte, 7. 

 Plesiocerithium, 50. 

 Plesiothyreus, 30. 

 Plesiotriton, 43. 

 Pleuroneciia, see Amussium. 

 Pleurotoma, 51, 67 



Pleuroioma, see Amblyacrum, Astheno- 

 toma, Bathytoma, Cryptoconus, Dril- 



lia, Genotia, Pseudotoma, Ptycha- 



tractus, Raphitoma, Tiachelochetus. 

 Pleurotomaria, 21. 

 Plicatula, 19. 

 Pliciscala, 26. 

 Polycirsus, 31. 

 Pomatias, III. 

 Pomatias, see Hartmannia. 

 Poromya, see Basterotia, Sportella. 

 Poronia, see Lasaea. 

 Potamides, 40, 65. 

 Propeamussium, 18. 

 Prosthenodon, 33. 

 Protocardia, 9. 



Protocardia, see Nemocardium. 

 Psammobia, 5 62. 

 Psam mobia , see Scrobiculabra, Soleno- 



tellina, Veneritapes. 

 Psammodonax, 5. 

 Psathura, 7. 

 Pseudamussium, 18. 

 Pseiidantalis, see Fustiaria. 

 Pseudodiloma, 22. 

 Pseudolatirus, 46. 

 Pseudoliva, 44. 

 Pseudomalaxis, 33. 

 Pseudotaphrus, 32. 

 Pseudotoma, 50. 

 Pteropoda, 60. 

 Pterostoma, see Teleostoma. 

 Pteronotns, see Triplex. 

 Ptychatractus, 46. 

 Pugilina, 46. 

 Pulsellum, 20. 

 Pupa, 57, 72. . 

 Pupa, seeCarychium,ClausiIia, Isthmia, 



Megaspira. 

 Purpura, see Tritonidea. 

 Pycnodonta, 19. 

 Pyramidella, 24. 



Pyramidella, see Megaspira, Syrnola. 

 Pyrazus, 40. 

 Pyriila, see Pirula. 

 Pythina, 13. 

 Pythiopsis, 56. 

 Pythiopsis, see Auricula. 

 Pyxipoma, 36. 



Quoyia, see Dissochilus. 



Radula, see Lima. 

 Ranularia, 43, iii. 

 Raphitoma, 52. 

 Raulinia, 65. 

 Rhaphim, see Eulimella. 

 Rhysota, 56. 

 Rillyia, 57. 

 Rimella, 41. 

 Rimula, 21. 

 Ringicula, 54, 68. 



