'50 



LIST OF SPECIES. 



Nitidus, Planorbis, 224 

 Nitidus, Zonites, 255 

 Nigra, Limapontia, 

 Nigra, Modiolaria, 29 

 Nivalis, Pleurotoma, 544 

 Nivosa, Odostomia, 469 

 Noachina, Puncturella, 328 

 Nobilis, Fiona, 593 

 Nodiferus, Triton, 459 

 Nodosa, Goniodoris, 

 Nodosum, Cardium, 135 

 Nodulosa, Area, 15 

 Northumbrica, ^Eolis, 

 Norvegica, Lyonsia, 173 

 Norvegica, Saxicava, 156 

 Norvegica, Teredo, 166 

 Norvegicum, Cardium, 138 

 Norvegicus, Fusus, 521 

 Nucleus, Nucula, 2 



Obliqua, Area, 12 

 Obliqua, Odostomia, 485 

 Oblonga, Doris, 

 Oblonga, Lutraria, 148 

 Oblonga, Succinea, 314 

 Obscurus, Bulimus, 262 

 Obtusata, Littorina, 387 

 Obtusus.Tornatinus, 553 

 Obvoluta, Helix, 277 

 Occidentalis, Trochus, 354 

 Ocellata, Polycera, 

 Olivacea, oEolis, 

 Opalina, Jeffreysia, 436 

 Opercularis, Pecten, 35 

 Otis, Otina, 204 

 Ovale, Sphaerium, 83 

 Ovata, Venus, 120 



Pallida, Embletonia, 

 Pallida, Odostomia, 475 

 Pallidula, Lacuna, 396 

 Palustris, Limnaea, 211 

 Papillata, Crimora, 608 

 Papillosa, ^Eolis, 

 Papillosum, Cardium, 132 

 Papyracea, Pholadidea, 164 

 Papyracea, Thracia, 175 

 Parva, Pholas, 162 

 Parva, Rissoa, 411 

 Parvula, Clausilia, 308 

 Patelliformis, Anomia, 10 

 Patula, Ovula, 458 

 Peachii, ^Eolis, 

 Pectunculoides, Area, n 

 Pedicellata, Teredo, 168 

 Pelagica, Scyllasa, 655 

 Pellucida, ^Eolis, 



Pellucida, Vitrina, 247 

 Pellucidum, Helcion, 325 

 Pellucidus, Solen, 152 

 Pennigera, Thecacera, 

 Peregra, Limnaea, 212 

 Pernula, Leda, 8 

 Perspicua, Lamellaria, 377 

 Perversa, Balea, 303 

 Perversum, Cerithium, 445 

 Pes-pelecani, Aporrhais, 455 

 Pfeifferi, Succinea, 315 

 Phaseolinus, Mytilus, 23 

 Pholadiformis, Petricola, 128 

 Picta, /Eolis, 

 Pictorum, Unio, 56 

 Pilosa, Doris, 

 Pinnatifida, Doto, 

 Piperata, Scrobicularia, 103 

 Piscinalis, Valvata, 442 

 Planorbis, Skenea, 434 

 Plebeia, Tritonia, 

 'Plicata, Odostomia, 482 

 Plicata, Panopaea, 158 

 Plicatilis, Velutina, 378 

 Plumella, Pleurobranchus, 581 

 Polita, Eulima, 461 

 Politus, Donax, 106 

 Polymorpha, Dreissensia, 60 

 Pomatia, Helix, 279 

 Portlandicus, Lomanotus, 

 Praetenuis, Thracia, 174 

 Prismatica, Scrobicularia, 99 

 Propinquus, Fusus, 525 

 Proxima, Doris, 

 Proxima, Rissoa, 418 

 Pruinosa, Philine, 574 

 Pseudo-scalaris, Scalaria, 364 

 Pubescens, Thracia, 176 

 Pulchella, Cerithiopsis, 449 

 Pulchella, Helix, 280 

 Pulchella, Idalia, 

 Pulcherrima, Rissoa, 420 

 Pulchra, Embletonia, 

 Pulla, Phasianella, 355 

 Pullastra, Tapes, 125 

 Pisana, Helix, 278 

 Punctata, ^Eolis, 

 Punctata, Aplysia, 577 

 Punctata, Philine, 573 

 Punctilucens, ^Egirus, 605 

 Punctura, Rissoa, 407 

 Purpurascens, ^Eolis, 

 Purpurea, Mangilia, 535 

 Purus, Zonites, 257 

 Pusilla, Doris, 

 Pusilla, Odostomia, 499 

 Pusilla, Tellina, 97 



