756 



INDEX 



Ammonites, 737, 741 

 Amnion, of P< rijuifiix, r>64 : Periplaneta, 

 581 : Scorpion, 610 



AMCEBA, 10, 11, 12, 13, 14: Pseudopods, 

 44 : Endosarc, 44 ; Ectosarc, 44 : Con- 

 tractile vacuole, 44 : Encystation, 44 : 

 Fission, 44 : Systematic position, 46 



Amcebocytes, 352, 368 

 Amcebula, of Gregarina, 77 



Amphiblastula, 113*, 114 



Amphicliscs, 112 



Aiiij>1ti/iita, 267 



Amphineura, 631 : Distinctive characters 

 and classification, 663 : General organi- 

 sation, 663 : External features, 663, 

 664, 665 : Alimentary system, 665 : 

 Body-cavity, 666 : Vascular system, 

 666 : Nervous system, 666, 667 : Re- 

 productive and renal organs, 668 : 

 Development, 669 : Ethology, distribu- 

 tion, etc., 670 



Amphipoda, 524*. 543, 544, 545, 547, 550 



Amphiptyches, 247, 267 



AmpKistorffatm, 242 



Amphitrttua pelagicus, 749 



Ampullse, 349, 350 



Anipiillin-in, 699 



Amusiwm, 653, 655 



Anal filament, 614 



Anal glands, of Pert/mtH*, 562 



Anal respiration, 550 



Anal spot, of Pni-in<-lam, 81 



Anatomy, 3* 



Anguillula, 283 



Anisopoda, 543 



Annulata, 403 : General remarks on, 481 



Annuli, of Leech, 463 



AXODONTA, 631 : Shell, 633 : Body, 635 : 

 Muscles, 635 : CVlome, 635 : Digestive 

 organs, 636 : Gills, 636 ; Excretory 

 organs, 640 : Circulatory system, 640 : 

 Nervous system, 641 : Sensory organs, 

 642 : Reproductive organs, 642 : De- 

 velopment, 643 : Systematic position, 



647 



Ano'iou/n, 649, 652, 654,655, 659 



Anomia, 646, 648, 649 



Antedon, 391 



Anoplophyra, 85 



ANTEDON BOSACEA, 373 : General external 

 features, 373 : Ossicles, 374 : CVelome, 

 374 : Enteric canal, 375 : Ambulacra! 

 system, 375 : Nervous system, 375 : 

 Blood-vascular system, 376 : Sacculi, 

 376 : Reproductive organs, 377 : Meta- 

 morphosis, 377 : Systematic position, 

 381 : Development, 398 



Antenna, of Antacux, 502 See also Ap- 

 pendages 



Antennary gland, of Astwim, 509, 510 



Antennary glands, 523, 550 



Antennule, of Aztacus, 502 See also 

 Appendages 



ANTHENEA FLAVESCENS, 356, 357, 358 

 Anthomeduss, 131*, 133, 134 

 Anthophysa, 66 

 Anthosoma, 530, 531 

 Antimeres, 40 



Antipatliaria,_ 182*, 187, 188, 190, 197 

 Ant-lions, 585 

 Ants, 587, 603 

 Aorta See Vascular system 

 Aphides, 598 

 Ajjhrof/ifta, 435, 436 

 Apical plate, of Trochosphere, 298 

 Apical system of plates, 362, 365 

 Apis mettifica, 589, 603 

 Aplacophora.663, 664,666, 668, 609, 671 

 Ai>ly*ia, 687, 688, 6H5 

 Aplysiidce, 684 

 Apoda (Holothuroidea), 380 

 Apopyle, 99,101*, las 

 Appendages, of Rotifera, 306: Apus, 

 487, Axfxnis, 500, 501 : Crustacea, 

 525: Peri}*tt,t, 560: Peripnetala, 

 572 : Insecta, 588 : Scorpion, 606 

 Aptera, 583, 591 

 A i it it* rosce, 585 

 Aptvchus, 741 



APUS, 484 : External characters, 485 : 

 Appendages, 487, 488 : Body-wall, 

 489 : Muscular system, 490 : Digestive 

 organs, 490, 491 : Body-cavity, 491 : 

 Circulatory system, 491 : Respiration, 

 492 : Renal organ, 492 : Nervous system, 

 492, 494 : Organs of sense, 494 : Re- 

 productive organs, 495 : Development, 

 496 : Systematic position, 524 

 A />n*, 552 



Apus caneriformis, 485, 489 

 Aim* glacialis, 4s, 

 Aquatic pupa, 602 

 Arachnida, 484, 604: Example, 



Distinctive characters and classifica- 

 tion, 611: General organisation, 613: 

 External form, 613, 619 : Endosternite, 

 618 : Coxal glands, 618 : Alimentary 

 system, 618 : Heart, 619 : Organs of 

 respiration, 619: Nervous system, 

 621 : Sense-organs, 621 : Reproductive 

 apparatus, 622 : Mode of life, 623 : 

 Geological history, 624: Appendix, 

 624 



Arachnidium, 615 

 Araneida, 612% 618, 621 

 Arbacia pwnetvlata, pedicellaria, 389 

 Area, 646, 648, 652, 653, 655, 658 

 ArctUa, 48 

 Archenteron, 21* 

 ArcM-Annelida, 462, 482 

 Archi-cerebrum, 513 

 Archi-cerebrum, of Periplaneta, 582 

 ArcM-Chsetopoda, 427 

 Ai-i:hi(jttt.x, 247, 267 

 Architeuthis, 749 

 Argiope, 338 



