5X2 



INDEX 



Amphibia, 513 

 Amphibiotica, 420 

 Amphicoele, 454 

 Amphiccelias, 528 

 Amphidiscs, 205 

 Amphigony, 129 

 Amphilina, 247 

 Amphimixis, 140 

 Amphineura, 315 

 Amphinuclei, 57 

 Amphioxus, 439 

 Amphipoda, 383 

 Amphiporus, 258 

 Amphisbama, 530 

 Amphistomum, 247 

 Amphitrite, 276, 278 

 Amphiuma, 520 

 Amphiura, 299 

 Amphoridae, 303 

 Ampullae, 203, 292, 478 



of Lorenzini, 500 

 Ampullaridse, 3^4 

 Amyda, 527 

 Anabrus, 421 

 Anacanthini, 511 

 Anaconda, 531 

 Anaerobic organisms, 91 

 Anal fin, 462, 497 

 Anallantoidea, 490 

 Analogy, 10, 90 

 Analytic species, 141 

 Anamnia, 490 

 Anaptomorphidae, 573 

 Anas, 543 

 Anaspides, 382 

 Anaxial animals, 123 

 Anelasma, 373 

 Angiostoma, 531 

 Anguillidue, 510 

 Anguillula, 265 

 Anguis, 530 

 Angulare, 549 

 Animalcula, 170 

 Animal organs, 90, no 



pole, 133, 142 

 Animals and Plants, 159 

 Anisomyaria, 323 

 Anisopoda, 386 

 Ankylostoma, 266 

 Anlage, iii (preface) 

 Annelida, 269 

 Annulata, 530 

 Anodonta, 324 

 Anolis, 529 

 Anomodontia, 526 



Anopheles, 190, 430 

 Anoplocephala, 255 

 Anser, 543 

 Anseriform.es, 543 

 Anteater, 563 



3piny> 559 

 Antedon, 302 

 Antennae, 352 

 Antennulse, 377 

 Antheomorpha, 225 

 Anthomedusse, 217 

 Anthozoa, 224 

 Anthropinae, 574 

 Anthropoidea, 574 

 Antilocapra, 569 

 Anlilope, 569 

 Antimere, 126 

 Antipathes, 231 

 Antlers, 569 

 Ant-lion, 422 

 Ants, 417, 426 



white, 419 

 Antrostomus, 544 

 Anura, 520 

 Anurida, 419 

 Aorta, 483 

 Aphaniptera, 431 



A P e s, 573 

 Aphidae, 430 

 Apiariae, 426 

 Apis, 426 

 Aplacentalia, 558 

 Aplacophora, 316 

 Aplysia, .334 

 Aplysina, 203 

 Apoda, 308, 374, 519 

 Apodidae, 366 

 Apophysis, 454 

 Aporosa, 231 

 Appendicularia, 443 

 Appendix, vermiform, 5^4 

 Aprophora, 428 

 Aptenodytes, 543 

 Aptera, 430 

 Apteria, 534 

 Apterygota, 418 

 Apteryx, 542 

 Apus, 366 

 Apyreme, 73 

 Aqueduct, 470 

 Aquila, 544 

 Arachnida, 389 

 Arachnoid membrane, 473 

 Araneina, 395 

 Arbacia, 305 



Arcella, 179 

 Archaeopteryx, 25, 541 

 Archegony, 127 

 Archencephalon, 468 

 Archenteron, 94, 146 

 Archianellida, 278 

 Archiccele, 145 

 Archigetes, 247, 253 

 Archiptera, 419 

 Archipterygium, 464 

 Architeuthis, 347 

 Arcidae, 323 

 Arcifera, 520 

 Arciferous, 513 

 Arctogaea, 163 

 Arctotherium, 565 

 Arcyria, 181 

 Ardea, 544 

 Arenicolidae, 278 

 Areolae mammae, 540 

 Areolar connective tissue, 



76 



Argas, 397 

 Argina, 323 

 Argiope, 291, 396 

 Argonautidae, 347 

 Argulus, 370 

 Arion, 336 

 Arista, 431 



Aristotle's lantern, 305 

 Armadillidium, 386 

 Armadillos, 563 

 Armata, 281 

 Army worm, 433 

 Artemia, 366 

 Arterial arches, 484 

 Arterial blood, 102 

 Arteries, 101 

 Arthrodira, 513 

 Arthrogastrida, 391 

 Arthropoda, 349 

 Arthrostraca, 383 

 Articulare, 461 

 Articular process, 455 

 Articulata, 302, 349 

 Artificial parthenogenesis, 



*37 



selection, 35 

 Artiodactyla, 568 

 Arvicola, 566 

 Ascalabotae, 529 

 Ascaridas, 266 

 Ascaris, 264, 266 

 Ascidiaeformes, 443 

 Ascidians, 443 



