786 



INDEX 



Alcyonidce, 205 



Alcyonidium, 340 



Alcyonium, 193, 200 



Alecithal egg, 217* 



Algce, 65 



Alimentary canal See Digestive 

 system 



Alimentary system See Digestive 

 system 



Allolobophora antipce, 469 



Alpheu*, 587 



Alpine forms, 8* 



Alternation of generations See Meta- 

 genesis 



Alveolus, of Sea-urchin, 389* 



Ambulacral area, 389 



Ambulacral grooves, 369* 



Ambulacra] ossicles, 371, 373, 374, 410 



Ambulacral pores, 371, 389 



Ambulacral ridges, 373 



Ambulacral spines, 369, 380 



Ambulacral system, of Astoria*, 375 : 

 Echinus, 389, 391: Sea-cucumber, 

 394, 395 : Antedon, 399 : Echino- 

 dermata, 407 



Amitotic division, 20* 



Ammonites, 767, 772, 780 



Amnion, of Periplaneta, 613* : 

 Scorpion, 644 



AMCEBA, 10, 11, 12, 13, 14, 15, 46 : 

 Pseudopods, 46, 47 : Endosarc, 46 : 

 Ectosarc, 46 : Contractile vacuole, 

 46, 47 : Encystation, 46 : Fission, 

 46 : Systematic position, 48 



Amoeba coli, 51 



Amoeba histolytica, 51 



Amcebidce, 48 



Amo3bocytes, 374, 392 



Amoeboid cells, 25 



Amce^ophyra, 231 



Amoabula, of Didymium, 68, 69 : of 

 Gregarina, 84, 86 



Amphiblastula, 124*, 125, 126 



Amphidiscs, 122*, 123 



Amphilina, 256, 283 



Amphineura, 663, 694* : Distinctive 

 characters and classification, 694 : 

 General organisation, 695 : External 

 features, 695, 696 : Ctenidia, 695 : 

 Alimentary system, 696, 697 : Body- 

 cavity, 697 : Vascular system, 698 : 

 Nervous system, 698 : Reproductive 

 and renal organs, 899, 700 : Develop- 

 ment, 700, 701 . Ethology, distribu- 

 tion, &c., 701, 702 



Amphinomidce, 457 



Amphipoda, 554*. 569, 570, 571, 572, 

 573, 578, 580, 581, 587 " 



Amphiptyches, 256, 258 



Amphistomum, 253 



Amphitretus pelagicus, 770 



Amphiura, 229 



Amphiura squamala, 420 



Ampullae, 159*, 371*, 391, 394 



Ampidlaria, 730 



Amusium, 685, 686 



Anal filament, 648 



Anal glands, of Peripatus, 594 



Anal respiration, 581 



Anal spot, of Paramcscium, 92 



Anal vesicles. 480* 



Anaspidacea, 552*, 567, 581, 587 



Anaspides, 553 



Anatomy, 3* 



Anchors, 176 



Anr/uillula, 299 



Anisopoda, 569* 



Annulata, 430* : General remarks on, 

 510 : Relationships, 512, 513 



Annuli of Leech, 494 



ANODONTA, 663 : Shell, 664, 665, 666 : 

 Body, 666, 667 : Muscles, 667 : 

 Ccelome, 667, 668 : Digestive organs, 

 668 : Gills, 669 : Excretory organs, 

 671, 672 : Circulatory system, 672, 

 673 : Nervous system, 673 : Sensory 

 organs, 673, 674 : Reproductive 

 organs, 674 : Development, 674, 

 675, 676 : Systematic position, 678, 

 679 



Anodonta cyqnea, 663, 664, 665, 667, 

 668, 669, 670 



Anomia, 678, 680 



Anomura, 555*, 574, 575 



Anopheles, 89 



Anoplophyra, 96 



Anoplura? 619 



Anostraca, 549*, 557 



ANTEDON ROSACEA, 396, 397 :. General 

 external features, 396, 397 : Ossicles, 



398 : Ccelome, 398 : Enteric canal, 



399 : Ambulacral system, 399 : 

 Nervous system, 400 : Perihaemal 

 and haemal system, 400 : Sacculi, 



400 : Reproductive organs, 401 : 

 Metamorphosis, 401, 423, 424 : Sys- 

 tematic position, 406 : Develop- 

 ment, 423, 424 



Antenna, of Astacus, 531 See also Ap- 

 pendages 



Antennary gland, of Astacus, 538, 539 



Antennary glands, 538, 581 



Antennule, of Astacus, 531 See also 

 Appendages 



ANTHENEA FLAVESCEXS, 376, 378, 379, 

 ' 380 



Anthomedusse, 142*, 144, 145, 149 



Anthowma, 561, 562 



Anthura, 554 



Antimeres, 43*, 406 



Antipatharia, 193*, 198, 199, 201,207 



Antipathes, 198 



Antispadix, 759 



Ant-lions, 618 



Ants, 621, 636, 637 



Aorta See Vascular system 



