INDEX 



811 



plaiu'f((, 621 : Inseeta, 037 : Scorpion, 

 655 



Apseudes, 507 



Aptera, 032*, 640, 677 



Aptychus, 795* 



APUS, 526 : External characters, 527, 

 528 : Appendages, 529, 530 : Body- 

 wall, 531: Muscular system, 532: 

 Digestive organs, 532, 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 



A pus, 534, 535, 537, 538 



Apus cancriformis, 528, 536 



Apus glacialis, 529 



Aquatic pupa, 651 



Arachnida, 526, 653*, 677 : Example, 

 053 : Distinctive characters and classi- 

 fication, 600 : General organisation, 

 062: External form, 662-667: Endo- 

 sternite, 667 : Coxal glands, 667 : 

 Alimentary system, 667 : Heart, 668 : 

 Organs of respiration, 668 : Nervous 

 system, 670 : Sense-organs, 070 : Re- 

 productive apparatus, 671 : Mode of 

 life, 672 : Geological history, 673 : 

 Appendix, 673 



Arachnidium, 664 



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



Arbacia punctulata, pedicellaria, 422 



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



Arcella, 49, 50 



Archseocytes, 122 



Archenteroii 23* 



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



Archi-cerebrum, 555 



Archi-cerebrum, of Periplaneta, 631 



Archi-Chaetopoda, 465*, 477 



Archigetcs, 262, 263, 287 



A rch iteuth is , 803 



Argiope, 300 



Aryonauta argo, 793, 796 



Argonauts, 790, 791, 796 



Argu/us, 565, 576, 577 



Arhynchobdellida, 516* 



Aricia, 479 



Aristotle's lantern, 397 



Ark-shell, 702 



ArmadUlidium, 586, 587 



Armadillo, 524, 546 



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



Arrow worms, 297 



Artemia, 563, 571 



Arthrobraiichia?, 551 



Arthropoda, 526* : Affinities of air- 

 breathing, 677 



Arthrostraca, 583* 



Articulata, 300*, 307, 368, 309 : Shell, 

 398 



Ascaridce, 304* 



ASCARIS LUMBKICOIDES, 297 : External 

 characters, 297 : Body-wall, 298 : 

 Digestive organs, 299, 300 : Cc.elome, 

 301 : Excretory system, 301 : Nervous 

 system, 3<ll, 302: Reproductive 

 organs, 302, 303: Development, 303: 

 Systematic position, 304 



Ascaris megalocephala, 297 



Ascari* in;//-nn /inxit, 308, 309, 310 



Ascari* xiiilld, 297 



Ascetta, 116 



Ascon, 117, 118* 



Ascopodaria, 354 



Asellus, 508, 583, 585 



Asexual reproduction, 40 : in Amoeba, 

 46 : Heliozoa, 59 : Radiolaria, 63 : 

 Euglena, 09 : Flagellata, 74 : Choano- 

 flagellata, 78 : Dinoflagellata, 79 : 

 Cystoflagellata, 79 : Sporozoa, 80 : 

 Coccidiidea, 84 : Haemosporidea, 80 : 

 Myxosporidea, 87 : Paramcecium, 90 : 

 Ciliata, 98 : Tentaculifera, 101 : 

 Sponges, 121 : Actinozoa, 197 : Platy- 

 helminthes, 283: Bugula, 346: 

 Chsetopoda, 486 



Aspergillum, 696, 701, 702 



Aspidobranchia, 733* 



Aspidochirotae, 415 



Aspidocotylea, 253*, 260, 273 



Aspidogaster, 284 



Asplanchna, 328, 330, 331 



A xtacopsis, 569 



Antaeus, 569 



ASTACUS 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, 550, 557 : Develop- 

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

 atic position, 5~0 



AstKi<>i*i*, 71 



ASTKKIAS urr.KNs, :>7~> : General external 

 features, 375, 376, 377 : Transverse 

 section of an arm. 378 : Vascular and 

 nervous systems. 379 : Structure of tin- 

 disc, 380: Body-wall and ccelome, 381 : 

 Digestive system, 382: Ambulacra) 

 system, 383 : Reproductive system. 

 386 : Systematic position, 414 

 , 414* 



development, 388, 389, 390, 

 391. 392, 393 



Axt(rhi t/ililinxrt, 429, 432 



Asteroidea, Example, 375 : Development, 

 .'!ss : Distinctive characters and classi- 

 fication, 410 : Apical system, 417 : 

 Modifications of form, 418, 419: 



