INDEX 



811 



lihiiidd, 621 . Inseota, 637 : Scorpion, 

 G5o 



Apsemhts, 567 



Aptera, 632*, 640, 677 



Apt^'chus, 79."!* 



Ai'i'S, 526 : External characters, 527, 

 528 : Appendages, 529, 530 : Body- 

 ^\■all, o31 : Muscular system, 532: 

 Digestive organs, .'132, 533 : Body- 

 cavity, 533 : Circulatory system, 533 : 

 Respiration, 534: Renal organ, 534, 

 535 : Nervous system, 534, 536 : 

 Organs of sense, 536, 537 : Reproduc- 

 tive organs, 537 : Development, 537, 

 538 : Systematic position, 569 



Apui, 534, 535, 537, 538 



Apus cancriformis, 528, 536 



.-l/j«< (jiaciiiliv, 529 



Aquatic pupa, 651 



Arachnida, 525, 653", 677 : Example, 

 653 : Distinctive characters and classi- 

 fication, 660 : C4eneral organisation, 

 602 ; External form, 662-667 : Endo- 

 sternite, 667 : Coxal glands, 667 : 

 Alimentary system, 667 : Heart, 668 : 

 Organs of respiration, 668 : Nervous 

 system, 670 : Sense-organs, 670 : Re- 

 productive apparatus, 671 : ilode of 

 life, 672 : Geological history, 673 . 

 Appendix, 673 



Arachnidium, 664 



Araneida, 661*, 664, 667, 669, 670 



Arhaciri punchdata, pedicellaria, 422 



Ami, 695, 697, 701, 702, 704, 706, 711 



Arcella, 49, 50 



Archaiocytes, 122 



Archenteron 23* 



AroM-Annelida, 439, 503*, 504, 505, 524 



Archi-cerebrum, 555 



Archi-cerebrura, of Periplaiiela, 631 



Arehi-Chsetopoda, 465 ', 477 



Archigetes, 262, 263, 287 



Architetithii, 803 



Arijiopf^, 366 



Ai-f/onriuki argo, 793, 796 



Argonauts, 790, 791, 796 



Argidus, 565, 576, 577 



Arhynchobdellida, 516* 



Arkia, 479 



Aristotle's lantern, 397 



Ark-shell, 702 



Armadillidium, 586, 587 



Armaddlo, 524, 546 



Armata, 496*, 497, 498, 499, 502 



Arrow worms, 297 



Artemia, 563, 571 



Arthrobranchise, 551 



Arthropoda, 526* • Affinities of air- 

 breathing, 677 



Arthrostraca, 583* 



Articulata, 366*, 367, 368, 369 : Shell, 

 398 



Asffiridd', 304" 



AscAKis LDMBRicoiDES, 297 : External 

 characters, 297 : Body-wall, 298 : 

 Digestive organs, 299, 300 : Goelome, 

 301 : Excretory system, 301 : Nervous 

 system, 301, 302 : Reproductive 

 organs, 302, 303 : Development, 303 : 

 Systematic position, 304 



Ascaris megrdocephala, 297 



A.'icnris nii'ii-ovnwid, 308, 309, 310 



Ascartu suiUa, 297 



Ascefta, 116 



Ascon, 117, 118* 



Ascopodaria, 354 



Aselhts, 568, 583, 585 



Asexual reproduction, 40 : in Amceba, 

 46: Heliozoa, 59: Radiolaria, 63 

 Euglena, 69 : Flagellata, 74 : Choano 

 flagellata, 78 : Dinoflagellata, 79 

 Cystoflagellata, 79 : Sporozoa, 80 

 Coccidiidea, 84 : Haemosporidea, 86 

 Myxosporidea, 87 : Paramcecium, 90 

 Ciliata, 98 : Tentaoulifera, 101 

 Sponges, 121 : Actinozoa, 197 : Platy 

 helminthes, 283 : Bugula, 346 

 Chaetopoda, 486 



Aspergilium, 696, 701, 702 



Aspidobranchia, 733* 



Aspidocbirotse, 415 



Aspidocotylea, 253*, 260, 273 



Aspidogaster, 284 



Asplanchna, 328, 330, 331 



Astacopsis, 569 



Antaeus, 569 



AsTAOUS FLUviATiLis, 539, External 

 characters, 540: Abdomen, 541, 

 Thoracic region, 541 : Head, 542 : 

 Appendages, 542, 543 : Articulations, 

 545 : Body-wall, 546 : Muscular 

 system, 546, 547 : Digestive organs, 

 548 : Respiratory organs, 549, 550 : 

 Excretory organs, 551, 552: Circula- 

 tory organs, 551, 552, 553, 554 : 

 Nervous system, 555 : Sensory organs, 

 556 : Reproduction, 556, 557 : Develop- 

 ment, 557, 558, 559, 560, 561 : System- 

 atic position, 570 



Ast(i'iio2Jsi«, 71 



AsTEBiAS RUBENS, 375 : General external 

 features, 375, 376, 377 : Transverse 

 section of an arm, 378 : Vascular and 

 nervous systems, 379 : Structure of the 

 disc, 380 : Body-wall andcielome, 381 : 

 Digestive system, 382 : Ambulacra! 

 system, 383 : Reproductive system, 

 386 : Systematic position, 414 



Asteriidce, 414* 



Asterina, development, 388, 389, 390, 

 391, 392, 393 



Asterina yibbosa, 429, 432 



Asteroidea, Example, 375 : Development, 

 388 : Distinctive characters and classi- 

 fication, 410 : Apical system, 417 : 

 Modifications of form, 418, 419 : 



