832 



INDEX 



Poromya, 696, 785 



Porpita, 166, 166 



Port-hole See Cinclis 



Portuguese Man-of-War, 163 



Portunus, 591 



Post-abdomen of Scorpion, 654 



Potamobiidce, 570* 



Poterion, 115 



Prae-abdomen of Scorpion, 654 



Prawns, 587, 588 



Priapulidcr, 496 



Priapulns, 497, 498, 499 



Primary axis, 41*, 42 



Prismatic layer, 684 



Proboscis, 237 



Prodandrous, 307* 



Proglottides, 247* 



Progoneata, 614*, 619, 677 



Pro-legs, 649 



Proneomenia, 713, 717 



Pronucleus, active and stationary, 91 



Pronucleus, male and female, 19*, 20 



Pro-ostracum, 795* 



Propodium, 725, 739 



Prorocentrum, 78, 79 



Prorodon, 94, 95 



Proscolex, 250* 



Prosiphon, 741* 



Prosobranchia See Streptoneura 



Prosoccele, 356* 



Prosoma, 654 



Prosopyle, 108, 109* 



Prostate, 270, 271, 483 



Prostomium, 440*, 455, 469 



Protamaba, 49 



Protandrous, 307* 



Protective characters, 601 



Proteid, 15* 



Proteolepas, 565, 579 



Proterospongia, 77, 78, 127 



Proteus Animalcule, 10 



Prothorax, 622 



Protobrancbia, 695*, 697, 698, 702, 705, 



711, 712, 805 

 Protoconch, 776*, 794 

 Protodrilus, 504, 524 

 Protohydra, 148 

 Protomerite, 82*, 83 

 Protomyxa, 67 

 Protonemertini, 295* 

 Protonephridial system, 236*, 269 

 Protoplasm, 11*, 14, 15*, 16 

 Protopodite, 538*, 542 

 Prototroch, 322, 451 

 Protozoa, 45_ 

 Protozoea, 599 

 Protractor muscle, 683 

 Proventriculus, 624 

 Psammodema, 115 

 Pseudo-gastrula, 124* 

 Pseudo-lamellibrancMa, 695*, 697, 698, 



700, 711, 712 

 Pseudo-manubrium, 155* 



Pseudo-metamerism, 255* 



Pseudopod, 10*, 45* : of Amcela, 46 



Pseudo-scorpionida, 660*, 662, 668, 670 



/Wtf*, 423 



Psorosperms, 87 



Pteropoda, 734*, 741, 756 



Pterolrachea, 742 



Pulmonary sac, 743* 



Pulmonata, 734*, 738, 740, 743, 744, 746 



748, 749, 750, 755, 756 

 Pulsdlum, 756 

 Pupa (of Cirripedia), 598 

 Pupa (of Insects), 649 

 Purpura, 744 



Pycnogonida, 673*, 674, 678 

 Pygidium, 605* 

 Pyloric cjeca, 382 

 Pyrenoids, 73 

 Pyriform organ, 344 

 Pyriform sac, 787 

 Pyrnla, 749 

 Pyxicola, 95 



Q 



R 



UADRULA, 49 



Q 



B 



_IACHIS, 302* 



Radial Canals, 107, 108, 109*, 118 



Radial Symmetry, 42* 



Radiata, 436 



Radii, orders of, 139 



Radiolaria, 48* : General structure, 60 : 

 Central capsule, 60 : Skeleton, 61 : 

 Colonial forms, 61 : Reproduction, 63 : 

 Symbiosis, 63 



Radula, 726 *, 728 



Radular, sac, 726*, 782 



Rainey's corpuscles, 88* 



Raphidiophrys, 58 



Razor-fish, 711 



Receptacula ovoruin, 462 



Red coral, 195 



Redia, 245* 



Regularia, 412*, 415 



Relationship, 6* 



Relationships, of Protozoa, 102 : Sponges, 

 127, 228 : Coelenterata, 226 : Platyhel- 

 minthes, 283 : Nemathelminth.es, 320 : 

 Rotifers, 335 : Dinophilea, 336 : Mol- 

 luscoida, 372: Echinodermata, 436, 

 502 : Annulata, 524, 602 : Air-breath- 

 ing Arthropoda, 676: Pelecypoda, 

 712 : Cephalopoda, 804 : Mollusca, 804 



Relationships, diagrams of : of Protozoa, 

 103 : Crelenterata, 229 : Platyhel- 

 minthes, 287 : Echinodermata, 437 : 

 Annulata and Trochelminthes, 525 : 



