[Names of genera and sub-genera regarded as synonyms are printed in i#fadics, all others in Roman. | 
Abacocrinus, 144 
Abatus, 245 
Ablacomya, 371 
Abra, 418 
Acambona, 338 
Acanthactinella, 55 
Acantherpestes, 681 
Acanthinites, 560 
Acanthocaris, 655 
Acanthoceras, 585 
Acanthocheirus, 661 
Acanthochites, 435 
Acanthocladia, 283 
Acanthoclymenia, 548 
Acanthocrinus, 145 
Acanthocyathus, 84 
Acanthodictya, 55 
Acanthonautilus, 525 
Acanthopleura, 436 
Acanthopleuroceras, 578 
Acanthopora, 267 
Acanthosoma, 687 
Acanthotelson, 668 
Acanthoteuthis, 599 
Acanthothyris, 325 
Acasta, 652 
Acaste, 636 
Acavus, 495 
Acentrotremites, 196 
Acervularia, 79 
Aceste, 248 
Acestra, 55 
Achatina, 496 
Achelous, 666 
Acidaspis, 633 
Acila, 363 
Acleistoceras, 530 
Aclisina, 457 
Acmaea, 442 
Acridites, 684 
Acrioceras, 588 
Acritis, 306 
Acrochordocrinus, 169 
Acrocidaris, 228 
Acroculia, 461 
Acrosalenia, 227 
Acrothele, 308 
Acrotreta, 308 
Acrura, 204 
Actaeon, 484 
Actaeonella, 485 
Actaeonina, 485 
Actinacis, 95 
Actinocamax, 597 
Actinoceramus, 370 
Actinoceras, 528 
Actinoconchus, 339 
Actinocrinus, 141 
Actinodesma, 367 
Actinodonta, 378 
Actinometra, 175 
Actinomya, 391 
Actinopteria, 370 



INDEX 
Actinosepia, 603 
Actinostoma, 281 
Actinostreon, 373 
Actinostroma, 112 
Acus, 481 
Adacna, 413 
Adelactaeon, 485 
Adelastraea, 90 
Adelophthalmus, 676 
| Adeorbis, 452 
| Adranaria, 363 
Adrianites, 562 
Aechmina, 644 
Aedoeophasma, 683 
Aeger, 661 
Aeglina, 630 
Aegoceras, 557 
Aeolopneustes, 233 
Aérope, 248 
Aeschna, 685 
Aesiocrinus, 160 
Aeteleocystites, 186 
Aetomoceras, 575 
Aetostreon, 373 
Agaricia, 91 
Agaricocrinus, 143 
Agassiceras, 575 
Agassizia, 246 
Agassizocrinus, 162 
Agathelia, 84 
Agathiceras, 562 
Agelacrinus, 187 
Agina, 422 
Aglaspis, 672 
Agnesia, 443 
| Agnostus, 624 
| Agoniatites, 549 
Agraulus, 628 
Agria, 404 
Agulhasia, 329 
Aipoceras, 525 
Akera, 486 
Alaria, 470 
Alecto, 174, 260 
Alectryonia, 373 
Alexia, 493 
Alipes, 471 
Allagecrinus, 135 
Allocrinus, 148 
| Allodesma, 393 
Allopagus, 392, 411 
Alloprosalocrinus, 143 
Allorisma, 388 
Allotrychia, 368 
Alocolytoceras, 572 
Alsatites, 575 
Alveolina, 26 
Alveolites, 100 
Amalia, 497 
Amaltheus, 577 
Amaura, 462 
Amauropsis, 462 
Amberleya, 449 

Ambites, 563 
Amblycoceras, 578 
Amblypneustes, 232 
Amblypygus, 239 
Amblysiphonella, 65 
Ambocoelia, 336 
Ambonychia, 368 
Amicula, 435 
Amita, 367 
Ammodiscus, 23 
Amnicola, 464 
Amnigenia, 374 * 
Amoeboceras, 580 
| Amphiastraea, 87 
Amphibola, 493 
Amphiceras, 574 
Amphiclina, 340 
Amphiclinodonta, 
Amphicoelia, 368 
Amphidesma, 418 
Amphidonta, 373 
Amphidoxa, 498 
Amphigenia, 322 
Amphion, 635 
Amphiope, 237 
Amphipeltis, 668 
Amphipora, 113 
Amphispongia, 55 
Amphistegina, 32 
Amphistrophia, 312 
Amphithelion, 54 
Amphitomella, 339 
Amphoracrinus, 141 
Amplexopora, 278 
Amplexus, 76 
Ampullina, 462 
Ampyx, 625 
Amusium, 381 
Amynilispes, 681 
Anabacia, 93 
Anabia, 338 
Anadara, 366 
Anadenus, 498 
340 
| Anagymnites, 557 
Anahamulina, 571 
Anahedenstroemia, 555 
Anahoplites, 584. 
Analcites, 560 
Analytoceras, 568 
Anamalina, 30 
Ananchytes, 243 
Anapella, 421 
Anarcestes, 549 
Anarthropora, 288 
Anascaphites, 572 
Anasibirites, 558 
Anasirenites, 560 
Anaspides, 659 
Anastrophia, 321 
Anatibetites, 560 
Anatimya, 389 
Anatina, 389 
Anatinella, 420 
Anatomites, 554 
Anatropites, 554 
Anax, 685 
Anazyga, 333 
Anchura, 470 
Ancilla, 481 
Ancillaria, 481 
Ancistroceras, 521 
Ancistrocrania, 311 
Anculosa, 467 
Ancyloceras, 588 
Ancylus, 494 
Ancyropyge, 633 
Androgynoceras, 578 
Angaria, 449 
Angelinoceras, 521 
Anisactinella, 340 
Anisoeardia, 394 
Anisoceras, 587 
Anisocrinus, 164 
Anisomyon, 492 
Anisophyllum, 76 
Anisothyris, 422 
Anisotrypa, 277 
Anodonta, 378 
Anodontopsis, 393 
Anolotichea, 268 
Anomactinella, 339 
Anomalanthus, 237 
Anomaloearis, 641 
Anomaloceras, 524 
Anomalocrinus, 152 
Anomalocystites, 186 
Anomalodonta, 368 
Anomia, 384 

| Anomphalus, 451 
Anopaea, 370 
Anoplia, 316 
Anoploceras, 525 
Anoplophora, 375 
Anoplotheca, 338 
Anoptychia, 456 
Anorthopygus, 239 
Anotoceras, 553 
Antalis, 431 
Antedon, 174 
Anthocrinus, 150 
Anthonyia, 397 
Anthracoblattina, 683 
Anthracochiton, 434 
Anthracomartus, 679 
Anthracomya, 374 
Anthraconectes, 676 
Anthracoptera, 372 
Anthracosia, 374 
Antinomia, 329 
Antipleura, 362 
Antiptychina, 332 
Antirhynchonella, 321 
Anuscula, 363 

Aparchites, 644 
Apasmophyllum, 76 
| Aphanaia, 372 
