700 
Leptesthes, 397 
Leptobolus, 307 
Leptoceras, 571 
Leptochiton, 484 
Leptocoelia, 338 
Leptodesma, 367 
Leptodomus, 362 
Leptodus, 315 
Leptograptus, 118 
Leptomaria, 443 
Lepton, 411 
Leptophragma, 58 
Leptophyllia, 85 
Leptopoma, 460 
Leptopoterion, 67 
Leptoria, 88 
Leptosolen, 419 
Leptospisula, 420 
Leptostrophia, 313 
Leptoteuthis, 602 
Leptotrypa, 278 
Leptoxis, 467 
Leskia, 248 
Leuconia, 493 
Leucozonia, 479 
Leuroceras, 623 
Leveillaia, 443 
Lewisiella, 451 
Libitina, 395 
Libycoceras, 585 
Lichas, 632 
Lichenalia, 269 
Lichenopora, 264 
Lichenotrypa, 270 
Liebea, 372 
Ligula, 390 
Lillia, 577 
Lima, 383 
Limacina, 489 
Limaea, 383 
Limanomia, 384 
Limatula, 383 
Limax, 497 
Limnaea, 494 
Limnaeus, 494 
Limnocardium, 413 
Limopsis, 365 
Limopteria, 371 
Limuloides, 673 
Limulus, 672 
Linckia, 210 
Lindigia, 586 
Lindstroemella, 310 
Lindstroemia, 75 
Linearia, 417 
Lingula, 307 
Lingulasma, 308 
Lingulella, 307 
Lingulepis, 307 
Lingulina, 28 
Lingulocaris, 655 
Lingulodiscina, 310 
Lingulops, 308 
Linnarssonia, 308 
Linthia, 246 
Linuparus, 663 
Lioceras, 576 
Lioclema, 277 
Liolophura, 436 
Liopistha, 392 
Lioplax, 463 
Liothyrina, 329 
Liothyris, 329 
Liotia, 449 
Liparoceras, 578 
Liropteria, 370 
Lisgocaris, 658 
Lispoceras, 523 
Lispodesthes, 471 
Lissoceras, 569 
Lissochilus, 454 
Lithacoceras, 581 
Litharaea, 96 
Lithentomum, 684 
Lithobius, 681 
Lithocardium, 413 


TEXT-BOOK OF PALAEONTOLOGY 
Lithocrinus, 164 
Lithodendron, 87 
Lithodomus, 386 
Lithogaster, 664 
Lithoglyphus, 465 
Lithomantis, 684 
Lithophagus, 386 
Lithophyllia, 86 
| Lithopoma, 448 
| Lithopsyche, 689 
Lithosialis, 684 
Lithostrotion, 78 
Litiopa, 459 
Litoceras, 519 
Litoricola, 666 
Littorina, 459 
Littorinella, 464 
Lituites, 521 
Lituola, 24 
Lobantale, 431 
Lobites, 563 
Lobocarcinus, 666 
Lobolithes, 183 
Lobophora, 237 
Lobopsammia, 93 
Loculipora, 282 
Locusta, 684 
Loftusia, 110 
Longobardites, 557 
Lonsdaleia, 78 
Lophoceras, 526, 569 
Lopholepis, 263 
Lopholobites, 590 
Lophonotus, 682 
Lophophyllun, 76 
Lophoscris, 91 
Lophosmilia, 89 
Lophospira, 444 
Lorica, 436 
Loricella, 436 
Loricites, 434 
Loricula, 650 
Loriolaster, 207 
Loripes, 408 
Lotoriwm, 474 
Lottia, 442 
Lovenia, 247 
| Loxoceras, 527 
Loxonema, 456 
Loxopteria, 367 
Lucapina, 445 
Lucapinella, 445 
Lucina, 408 
Ludwigia, 576 
Luidia, 208 
Lumbriearia, 254 
Lumbricites, 254 
Lunatia, 462 
Lunulicardium, 367 
Lunulites, 285 
Lunuloceras, 577 
Lutetia, 411 
Lutraria, 420 
Luzonia, 393 
Lychnus, 497 
Lycodes, 376 
Lycophoria, 321 
Lycophrys, 34 
Lyonsia, 397 
Lyonsiella, 391 
Lyra, 331 
Lyria, 480 
Lyriocrinus, 146 
Lyriopecten, 380 
Lyrodesma, 378 
Lyropora, 282 
Lysis, 478 
Lyticoceras, 586 
Lytoceras, 572 
Lyttonia, 315 
Macandrevia, 331 
Macha, 419 
Machilis, 683 
Machomya, 389 
Maclurea, 446 
Macoma, 418 
Macraster, 244 
| Macrocaris, 655 
Macrocephalites, 580 
Macrocheilus, 456 
| Maerochilina, 456 
Macrocypris, 646 
Macrodon, 364 
| Maeropeza, 688 
| Macropneustes, 247 
Macroscaphites, 571 
| Macroschisma, 445 
| Macrostylocrinus, 148 
Mactra, 420 
| Mactrella, 420 
| Mactroderma, 420 
Mactromya, 389 
_ Mactropsis, 421 
Mactrotoma, 420 
| Maeandrina, 88 

Maeneceras, 551 
Magas, 333 
Magasella, 333 
Magellania, 333 
Magnosia, 230 
Malaptera, 471 
Malletia, 364 
| Malleus, 372 
| Mamilla, 462 
Mammites, 588 
Mandaloceras, 531 
Mangilia, 483 
Mannia, 333 
Manticoceras, 550 
Maretia, 247 
| Margarita, 451 
| Margarites, 554 
Margarya, 463 
| Marginaria, 287 


Marginella, 479 
Marginifera, 317 
Marginulina, 27 
Mariacrinus, 147 
Marmolatella, 453 
Marsupiocrinus, 139 
Marsupites, 165 
Martesia, 424 
Mastigocrinus, 157 
Matercula, 367 
Matheria, 365 
Matheronia, 400 
Mathilda, 457 
| Matthewia, 491 
| Matuta, 666 
Mazza, 479 
Mazzalina, 479 
Mecochirus, 662 
Mecynodon, 394 
Mecynostoma, 686 
Medlicottia, 563 
Medusaster, 210 
Medusites, 121 
| Meekella, 315 
| Meekia, 407 
Meekoceras, 556 
Meekopora, 270 
Megacystites, 183 
Megalanteris, 327 
Megalaspis, 630 
Megalithista, 52 
| Megalodon, 376 
Megalomostoma, 460 
Megalomus, 365 
| Meganeura, 684 
Meganteris, 327 
Megaphyllites, 566 
Megaptera, 368 
Megaspira, 496 
Megatebennus, 445 
Megateuthis, 597 
Megathentomum, 684 
Megathyris, 3380 
Megerlia, 331 
Megerlina, 333 
Megistocrinus, 144 
Meiocardia, 414 

Melampus, 493 
Melania, 467 
Melanopsis, 467 
Melantho, 463 
Meleagrina, 371 
Melia, 519 
Meliceritites, 271 
Mellita, 237 
Melo, 480 
Meloceras, 530 
Melocrinus, 146 
Melonella, 51 
Melongena, 476 
Melonites, 221 
| Melonoceras, 530 
Membranipora, 286, 287 
Membraniporella, 287 
Meneghiniveras, 568 
Menipea, 284 
Menophyllum, 76 
| Meonia, 247 
| Meretrix, 415 
Merista, 341 
Meristella, 341 
Meristina, 338 
Meroé, 415 
Mesalia, 465 
Mesentiripora, 261 
Mesites, 187 
Mesoblastus, 194 
Mesoblattina, 684 
Mesoceras, 516 
Mesodesina, 421 
Mesothyra, 657 
Mesotreta, 308 
Mesotrypa, 273 
Mespilocrinus, 164 
Metablastus, 195 
Metacanthoplites, 589 
Metacoceras, 524 
Metacrinus, 173 
Metalia, 247 
Metaplasia, 337 
Metaporhinus, 242 
Metasibirites, 558 
Metatirolites, 559 
Metopaster, 208 
Metoptoma, 442 
Metriophyllum, 76 
Metula, 476 
Meyeria, 664 
Michelinia, 101 
Mickwitzia, 307 
Micrabacia, 94 
Micraster, 246 
Microceras, 578 
Microconchus, 253 
Microcyclus, 75 
Microcyphus, 232 
Microderoceras, 578 
Microdiadema, 229 
Microdicus, 625 
Microdoma, 450 
Microdon, 394 
Micromaia, 666 
Micromelania, 464 
Micromelo, 486 
Micropedina, 230 
Micropocrinus, 171 
Micropora, 287 
Microporella, 288 
Micropsis, 231 
Microsehiza, 456 
Microseris, 91 
Microsolena, 94 
Microthorax, 666 
Microthyris, 832 
Microtropites, 554 
Mila, 367 
Miliola, 26 
Millepora, 109 
Millericrinus, 169 
Milleroceras, 530 
Milneria, 899 
Miltha, 408 
Miltites, 554 
