Mimoceras, 549 
Mimocystites, 185 
Mimulus, 315 
Mischoptera, 684 
Mitra, 479 
Mitraefusus, 476 
Mitraster, 208 
Mitroclema, 262 
Mitrocystites, 186 
Mixosiphonoceras, 529 
Modelia, 448 
Modiella, 372 
Modiola, 386 
Modiolaria, 386 
Modiolodon, 385 
Modioloides, 362 
Modiolopsis, 385 
Modiomorpha, 385 
Mogulia, 445 
Mohrensternia, 464 
Moira, 246 
Moiropsis, 246 
Mojsisoviesia, 590 
Mojsvarites, 566 
Moltkia, 106 
Monia, 384 
Monobolina, 310 
Monoceros, 478 
Monodaena, 413 
Monodonta, 451 
Monograptus, 117 
Monomerellia, 306 
Monophyllites, 566 
Monopleura, 401 
Monoporella, 288 
Monoprion, 117 
Monopteria, 371 
Monotis, 371 
Monotrypa, 275 
Monotrypella, 278 
Monticulipora, 272 
Montlivaultia, 85 
Mopalia, 435 
Morio, 474 
Morphoceras, 583 
Morrisia, 330 
Mortoniceras, 589 
Moulinsia, 236 
Mourlonia, 443 
Mucronella, 288 
Muehlfeldtia, 331 
Muensterites, 560 
Muenstervceras, 552 
Mulinia, 420 
Mulleria, 378 
Mulletia, 370 
Multelea, 271 
Multicavea, 266 
Multicresis, 266 
Multifascigera, 263 
Muniericeras, 588 
Murchisonia, 444 
Murex, 477 
Musca, 688 
Musica, 480 
Mutela, 378 
Mutiella, 409 
Mya, 421 
Myacites, 387 
Myalina, 372 
Myalinodonia, 371 
Myalinoptera, 372 
Mycediun, 91 
Mycetopus, 378 
Mycocrinus, 153 
Mylacris, 683 
Myocaris, 658 
Myochaina, 390 
Myoconcha, 3385 
Myodora, 390 
Myoledactylus, 153 
Myonera, 393 
Myonia, 485 
Myophoria, 375, 379 
Myophoriopsis, 379 
Myoplusia, 363 


Myopsis, 389 
Myrianites, 256 
Myriopora, 289 
Myriozoum, 239 
Myristica, 476 
Myrmar, 690 
Myrtea, 408 
Myrtillocrinus, 137 
Mysidia, 372 
Mystrophora, 320 
Mytilarea, 368 
Mytilops, 372 
Mytilopsis, 386 
Mytilus, 385 
Nacella, 442 
Naites, 256 
Nannites, 553 
Nanno, 515 
Nanocrinus, 155 
Naranaio, 417 
Narthecoceras, 515 
Nassa, 476 
Natica, 462 
Naticella, 453 
Naticopsis, 452 
Natiria, 453 
Naucoris, 687 
Nautilus, 526 
Nayadites, 374 
Neaera, 392 
Neatretia, 325 
Nebalia, 654 
Necrocarcinus, 666 
Necrogammarus, 668 
Necroscylla, 660 
Nectotelson, 659 
Neithea, 380 
Nemapodia, 256 
Nematopora, 281 
Nematura, 464 
Nemertites, 256 
Nemodon, 365 
Neobolus, 306 
Neocatillus, 370 
Neocatopygus, 240 
Neoicoceras, 550 
Neolampas, 242 
Neolimulus, 672 
Neolobites, 585 
Neorthroblattina, 684 
Neoschizodus, 379 
Neothyris, 333 
Nephriticeras, 523 
Nephrops, 664 
Neptocarcinus, 666 
Neptunea, 476 
Neptunus, 666 
Nereites, 256 
Nerinea, 468 
Nerinella, 468 
Nerita, 454 
Neritaria, 453 
Neritina, 454 
Neritodomus, 454 
Neritoma, 454 
Neritomopsis, 452 
Neritopsis, 453 
Neumayria, 580 
Neuropora, 267 
Neverita, 462 
Newberria, 326 
Nicholsonella, 276 
Nicholsonia, 279 
Nicomedites, 556 
Nileus, 630 
Ninella, 448 
Nipterella, 52 
Niso, 456 
Nodelea, 271 
Nodicresis, 266 
Nodosaria, 27 
Noetia, 366 
Noetlingia, 321 
Noetlingites, 557 
Nomismoceras, 553 
INDEX 


Nonionina, 34 
Norella, 324 
Norites, 563 
Normannites, 580 
Nostoceras, 588 
Notaiia, 285 
Nothoceras, 532 
Nothozoe, 655 
Notothyris, 329 
Novaculina, 419 
Nubecularia, 25 
Nucleatula, 327 
Nucleocrinus, 195 
Nucleolites, 239 
Nucleospira, 338 
Nueula, 363 
Nuculana, 363 
Nuculina, 364 
Nummiulina, 33 
Nummulites, 32 
Nuttallina, 435 
Nyassa, 375 
| Nyectopora, 99 
| Nymphaeops, 664 
Nymphaster, 208 
Nystia, 464 
Obolella, 305 
Obolellina, 306 
Obolus, 306 
Ochetoceras, 569 
Ocinebra, 477 
Octameroceras, 531 
Octonaria, 645 
| Oculina, 84 
Oculospongia, 64 
Odontoceras, 587 
Odontoperna, 370 
Odontostoma, 457 
Odontotrypa, 270 
Oecoptychius, 583 
Oecotraustes, 577 
Oedischia, 683 
Oehlertella, 310 
Offa, 647 
Offaster, 243 
Ogygia, 630 
Ohioecrinus, 152 
| Oldhamia, 315 
Olenellus, 628 
Olenikites, 559 
Olenus, 628 
Oleostephanus, 583 
Oligodon, 374 
Oligoporus, 221 
Oligotoma, 482 
Oliva, 481 
Ollacrinus, 146 
Omalavis, 458 
Omphalia, 465 
Omphalocirrus, 447 
Omphalophyllia, 94 
Omphalopterus, 463 
Omphalosagda, 497 
Omphalotrochus, 447 
Omphyma, 77 
Onchotrochus, 83 
Oncoceras, 530 
Oncochilus, 454 
Oncodoceras, 525 
Oncoma, 471 
Oncoparia, 664 
Oncophora, 416 
Oncospira, 450 
Onithochiton, 436 
| Onychaster, 203 
Onychia, 367 
| Onychocella, 286 
Onychocrinus, 163 
Ooceras, 530 
Oonia, 456 
Oonocareinus, 659 
Oonoceras, 530 
Opeas, 496 
Operculina, 32 
Ophiceras, 556 

701 
Ophidioceras, 520 
Ophileta, 446 
Ophioceras, 575 
Ophiocrinus, 158, 174 
Ophiocten, 205 
Ophioderma, 204 
Ophioglypha, 205 
Ophiolepis, 205 
Ophiomusium, 205 
Ophiraphidites, 46 
Ophiura, 204 
Ophiurella, 205 
Opis, 396 
Opisoma, 395 
Opisthoptera, 368 
Oploplorus, 661 
Oppelia, 577 
Orbicella, 308, 309 
Orbiculina, 25 
Orbiculoidea, 310 
Orbipecten, 380 
Orbitoides, 34 
Orbitolina, 24 
Orbitolites, 25 
Orbulina, 30 
Oreaster, 208 
Oriostoma, 447 
Oriskania, 326 
Ormoceras, 528 
Ornithaster, 246 
Ornithella, 332 
Orocystites, 184 
Orophocrinus, 198 
Orozoe, 656 
Orthambonites, 319 
Orthaulax, 472 
Orthidium, 315 
Orthis, 319 
Orthisina, 320 
Orthoceras, 518 
Orthocidaris, 225 
Orthodesma, 361 
Orthodontiscus, 393 
Orthoidea, 332 
Orthonomaed, 333 
Orthonota, 361 
Orthonychia, 460 
Orthopora, 281 
Orthopsis, 230 
Orthoptychus, 402 
Orthorhynehula, 323 
Orthostoma, 485 
Orthostrophia, 319 
Orthotheea, 491 
Orthothetes, 314 
Orthothrix, 317 
Orthotichia, 319 
Orthotoma, 332 
Orthotropia, 319 
Ortonia, 253 
Osculipora, 264 
Ostlingoceras, 587 
Ostracotruthis, 599 
Ostrea, 373 
Otoceras, 553 
Otopoma, 460 
Otostoma, 454 
Ovula, 473 
Oxybeloceras, 588 
Oxyclymenia, 548 
Oxygyrus, 455 
Oxynoticeras, 575 
Oxytoma, 371 
Pachastrella, 46 
Pachinion, 54 
Pachycardia, 375 
Pachyelypeus, 235 
Pachydictya, 280 
Pachydiscus, 570 
Pachydomella, 646 
Pachydon, 422 
Pachygyra, 90 
Pachylasma, 652 
Pachylocrinus, 160 
Pachymegalodon, 377 
