INDEX OF GENERA. 



827 



Mazzalina, 783 

 Meekella, 232 

 Meekopora, 126 

 Meekospira, 698 

 Megalomus, 410 

 Megambonia, 410 

 Melampus, 814 

 Melania, 740 

 Melaniidae, 739 

 Melanopsis, 741 

 Membranipora, 169 

 Meretrix, 563 

 Meristella, 355 

 Meristina, 351 

 Mesalia, 729, 731 

 Mesotrypa, 130 

 Metaplasia, 343 

 Michelinia, 89 

 Microcyclus, 65 

 Micro don, 534 

 Mitoclema, 120 

 Mitra, 789 

 Mitridae, 789 

 Modiella, 456 

 Modiola, 521 

 Modiolodon, 516 

 Modiolopsis, .511 

 Modiomorpha, 513 

 Mollusca, 361 

 Molluscoidea, 107 

 Monilopora, 81 

 Monograptus, 34 

 Monomerella, 190 

 Monopleura, 547 

 Monopteria, 450 

 Monotrypa, 137 

 Monotrypella, 131 

 Monticulipora, 127 

 Mourlonia, 646 

 Murchisonia, 650 

 Murchisonidae, 648 

 Murex, 785 

 Muricidae, 784 

 Myalina, 453 

 Mytilarca, 432 

 Mytilus, 520 



Naiadites, 477 

 Nassa, 763 

 Natica, 716 

 Naticidae, 715 

 Naticopsidae, 673 

 Naticopsis, 673 

 Neithea, 497 

 Nematopora, 153 

 Nemodon, 404 

 Neotremata, 199 

 Neptunea, 763 

 Nerinea, 744 

 Nerineidae, 744 

 Nerinella, 746 

 Nerita, 706 



Neritidae, 706 

 Neritopsidae, 705 

 Neritopsis, 705 

 Neverita, 719 

 Newtoniella, 749 

 Nicholsonella, 136 

 Niso, 709 

 Nisusia, 210 

 Nodosaria, 10 

 Nucleospira, 349 

 Nucula, 395 

 Nuculana, 400 

 Nuculites, 397 

 Nyassa, 478 



Obolella, 188 

 Octocoralla, 96 

 Oculina, 103 

 Odontofusus, 780 

 Odostomia, 710 

 Oliva, 795 

 Olivella, 796 

 Olividae, 795 

 Olivula, 797 

 Omphalotrochus, 667 

 Ontaria, 391 

 Onychocella, 169 

 Ophileta, 656 

 Ophiletina, 657 

 Opis, 540 



Opisthobranchia, 806 

 Orbiculoidea, 204 

 Orbitoides, 12 

 Orbulina, 10 

 Ormospira, 631 

 Orthaulax, 756 

 Orthidae, 249 

 Orthis, 249, 250 

 Orthodesma, 379 

 Orthonema, 696 

 Orthonota, 377 

 Orthonychia, 687 

 Orthorhynchula, 281 

 Orthostrophia, 256 

 Orthothetes, 231 

 Ortonella, 412 

 Ostrea, 458 

 Owenella, 610 

 Oxydiscus, 616 



Pachychilus, 740 

 Pachydictya, 159 

 Pachymelania, 742 

 Pachyphyllum, 70 

 Palaeacmaea, 606 

 Palaeacmaeidae, 603 

 Palaeanatina, 385 

 Palaeocapulus, 686 

 Palaeocyclus, 64 

 Palaeoneilo, 398 

 Paleschara, 166 

 Paludina, 725 



Panenka, 389 

 Panopea, 576 

 Paracardium, 392 

 Paracyclas, 554 

 Parallelodon, 403 

 Paranomia, 510 

 Parasmylia, 99 

 Parastrophia, 271 

 Parazyga, 346 

 Parmophorella, 606 

 Patinopecten, 504 

 Pecten, 495 

 Pectunculus, 418 

 Pelagiella, 823 

 Pelecypoda, 361 

 Peneroplis, 9 

 Pentagonia, 359 

 Pentamerella, 277 

 Pentamerus, 275 

 Peregrinella, 299 

 Perissolax, 767 

 Perissoptera, 753 

 Petaloconchus, 737 

 Petalotrypa, 131 

 Phacelopora, 121 

 Phanerotinus, 656 

 Phanerotrema, 638 

 Phenacomya, 530 

 Phillipsastraea, 69 

 Pholadella, 527 

 Pholadomya, 528 

 Pholidops, 208 

 Pholidostrophia, 219 

 Phractopora, 164 

 Phragmolithes, 617 

 Phragmostoma, 625 

 Phthonia, 376 

 Phyllodictya, 159 

 Phyllograptus, 29 

 Phylloporina, 140 

 Physa, 815 

 Physidae, 815 

 Piestrocheilus, 773 

 Pinna, 435 

 Pinnatopora, 150 

 Placunopsis, 510 

 Planorbis, 817 

 Plasmopora, 98 

 Platyceras, 680 

 Platyostoma, 679 

 Platystrophia, 257 

 Platytrochus, 101 

 Plectambonites, 226 

 Plectorthis, 251 

 Plethocardia, 416 

 Plethomytilus, 433 

 Pleurocora, 99 

 Pleurodictyum, 89 

 Pleurolymnaea, 817 

 Pleuromya, 522 

 Pleuronotus, 659 

 Pleurophorus, 533 



