INDEX 



811 



planeta, 621 : Insecta, 637 : Scorpion, 

 655 



Apseudts, 567 

 Aptera, 632*, 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 

 A put glacialiy, 529 

 Aquatic pupa, 651 



Arachnida, 526, 653*, 677 : Example, 

 653 : Distinctive characters arid classi- 

 fication, 660 : General organisation, 

 662: 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 : Mode of 

 life, 672 : Geological history, 673 : 

 Appendix, 673 

 Arachnidium, 664 

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

 Ai-bada piinctidata, pedicellaria, 422 

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

 ! Arcella, 49, 50 

 , Archseocytes, 122 

 Archenteron 23* 



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

 i Archi-cerebrum, 555 

 i Archi-cerebrum, of Periplaneta, 631 



Archi-Cheetopoda, 465*, 477 

 i Archigetcs, 262, 263, 287 



Arckiteutkis, 803 

 I Argiope, 366 

 A rgonauta argo, 793, 796 

 Argonauts, 790, 791, 796 

 ,Argulu, 565, 576, 577 

 , Arhynchobdellida, 516* 

 ' Aricia, 479 

 Aristotle's lantern, 397 

 Ark-shell, 702 

 ! Armadilltdium, 586, 587 

 i Armadillo, 524 546 

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

 , Arrow worms, 297 

 j Artemia, 563, 571 

 Arthrobranchise, 551 

 Arthropoda, 526* : Affinities of air- 

 breathing, 677 

 Arthrostraca, 583* 

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



398 

 Ascaridce, 304* 



ASCARIS LUMBRICOIDES, 297 : External 

 characters, 297: Body-wall, 298: 

 Digestive organs, 299, 300 : Coelome, 

 301 : Excretory system, 301 : Nervous 

 system, 301, 302: Reproductive 

 organs, 302, 303 : Development, 303 : 

 Systematic position, 304 



A scaris megalocepkala, 297 



Ascaris nigrovenom, 308, 309, 310 



Ascaris milla, 297 



Ascetta, 116 



Ascon, 117, 118* 



Ascopodaria, 354 



Asellus, 568, 583, 585 



Asexual reproduction, 40 : in Amoeba, 

 46: Heliozoa, 59: Radiolaria, 63: 

 Euglena, 69 : Flagellata, 74 : Choano- 

 flagellata, 78: Dinoflagellata, 79: 

 Cystoflagellata, 79 : Sporozoa, 80, 

 Coccidiidea, 84 : Haemosporidf 

 Myxosporidea, 87 : Paranu 

 Ciliata, 98 : Teataculifera, 

 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 



Astacopsis, 569 



Astacus, 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, 556, 557 : Develop- 

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

 atic position, 570 



Astasiopsis, 71 



ASTERIAS 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 andccelome, 381 : 

 Digestive system, 382 : Ambulacral 

 system, 383 : Reproductive system, 

 386 : Systematic position, 414 



Asteriidce, 414* 



Asterina, development, 388, 389, 390, 

 391, 392, 393 



Asterina gibbosa, 429, 432 



Asteroidea, Example, 375 : Development, 

 388 : Distinctive characters and classi- 

 fication, 410 : Apical system, 417 : 

 Modifications of form, 418, 419: 



