INDEX 



< i 



Brachiopoda, 341 : Starfish, 350 : >>''- 

 nrch'ui, 367 : Holothnrian, 370: .4//<'<- 

 <Zct, 375 : Echinodermata, 394 : .XV /v /\, 

 409, 410 : Lnmlnints, 422 : Ch;etopoda, 

 437 : Myzostomida, 448 : Sipiiuciilitx, 

 453 : Gephyrea, 457 : Archi-annelida, 

 464 : Hirndo, 472 : Hirudinea, 478 : 

 A/nix, 492 : Astacus, 513 : Crustacea, 

 550 : J\r!patiis, 562 : Myriapoda, 569 : 

 Periptaiitta, 578 : Insects, 594, 595 : 

 Si'Oi^jion, 609 : Arachnida, 621 : Jfiix- 

 xi As, 641 : Pelecypoda, 657 : Aniphi- 

 neura, 666, 667 : Triton, 679: Gastro- 

 poda, 693 : Scaphopoda, 706 : Rhodope, 

 7>7 : X<pi<(, "!", 719: Xnittifus, 734: 

 Cephalopoda, 744 



Nervous tissue, 27 



Neurileinma, 27*, 28 



Neuropodium, 405", 430 



Neuroptera, 584*, 598 



Xii-ofhfii-, 530, 531 



Nidamental gland, 724*' 



Noah's Ark shell, 646 



Xix-tiliK-n, 74 



Xoilfixni-in, 53 



Nomenclature, binomial, 1 



Non-Calcarea, 103* 



Xotttix, 305 



Not h< >!<, 305 



Notomma&a wemci'kii, 309 



Notopodium, 405", 430 



Nuchal cartilage, 712 



Nuclear membrane, 15*, 17 



Nuclear sap, 16* 



Nuclear spindle, 16*, 17 



Nucharia, 57 



Nucleolus, 15*, 17 



Nucleus, 11*, 15, 17 



Nuculgr, 646, 652, 653, 654, 655, 656, 

 657, 658 



NudibrancMa, 684*, 705 



Niiiiiiiniftftx, 53 



Xyctothtrns, 83, 85, 86 



Xt/inphon hixpidum, 625 



Oligochajta, 428"', 483 



Ommatidium, 494*, 495 



Onchidium, 695, 704 



Oitixrits, 543, 546 



Onychophora, 484, 559, 629 See Peri- 

 pat us 



Ou?ciuin, 314 



Oosperm, 20* 



Oostigite, 544"" 



Oostigopod, 480* 



Opal iiia, 84, 89 



Operculum (Gastropoda), 673*, 674, 688 



Ophioglypha, 386 



Ophiurida, 378* 



Ophiuridea, 346, 378*, 382, 383, 384, 385, 

 386, 387, 392, 393, 394, 395, 398, 399, 

 400 



Ophryodendron, 91 



Ophtryoglena, 85 



Opisthobranchia, 684* 



Opossum-Shrimp, 523 



Or<-hcstm, 543, 548 



Order, 4 i; 



Organic evolution See Evolution 



Organism, 1* 



Organ-pipe Coral, 182 



Organs, 29* 



Orthonectidce, 218 



Orthoptera, ">S4 



Orthoptera genuina, 587 



Oscarella, 108 



Oxi-'iiria, 106 



n-phradium, 642*, 657, 676, 695, 729, 743 



Ostracoda, 521*, 527 



0*trea, 647, 652, 656, 658, 660 



Otocyst, 37*, 125* 



Ovariole, 580*, 597 



Ovary, 37* 



Oviduct, 38* 



Oviparous, 38* 



Ovum, 18*, 28 



Oxygen, oxidation, 34 



Oxyurix, 285 







0, 



"BELLA, General structure, 118, 120: 

 Microscopic structure, 121, 122: Me- 

 dusae, 124, 125, 126 : Comparison of 

 polype with medusa, 126, 127, 128 : 

 Reproduction, 129: Development, 129 : 

 Systematic position, 132 



Octopoda, 736*, 738, 750 



Octopiix, 737, 739, 742 



Ocforrhamlra, 139 



Odentophora, 676*, 678 



(Esophagus See Digestive system 



Oikomonas, 66, 67 



ACHYCHALINA, 111* 

 Predogenesis, 39*, 211*, 266, 598 

 Payunix, 539 

 Palcemon, 538 

 J'n/,1 inomtex, 547 

 Palaeocrinoidea, 380* 

 Palaeodictyoptera, 604 

 Palaeo-echinoidea, 379* 

 Palseonemertinea, 273* 

 Paleontology, 6* 

 I 'a/ in urns, 537, 549, 553 

 Palinurus cidgaris, 556 

 Pallial line, 634* 



3D. 2 



