830 



INDEX 



Pardinithiax-, Gdl 

 Paramitome, 15* 

 Paramyliim, 68* 

 Paraiiaxj)idi:'s, 566, 582 

 Paravephrops, 569 



Parasitism, Protozoa, 12, 81, 8:2, 85, 87, 

 !I5 ; Hydrozoa, 167: Mesozoa, 230: 

 Rotifera, 335 

 PareDcliyma, 2W, -KU, 3."i I 

 Parenchyma muscle, 265 

 Parenchymula, 124* 

 Parthenogenesis, 21*, 40*, 287, 647 

 Parthenogonidium, 7o* 

 Parthenopi: , 591 

 Paidla, 737, 743, 745,746, 747, 749, 751, 



752, 753, 754 

 Pitraseison aii}}laiichiiiii!, 329 

 Parazoa, 105 

 Pattl/ldw, 733 

 Pauropoda, 614', 61s 

 Pitiirupii.s, 614, 615, 617 

 Paxilla, 414 

 Peachia, 202 

 Pea-crab, 602 

 Pearl-mussel, 710 

 Pearl-oyster, 1196 

 Pearls, 711 

 Piibrine, 87* 



Prcfeii, 696. 697, 700, 708, 710 

 Pectines, 655* 

 Pectinibrancliia, 733,* 744 

 Pedal gland, 725* : Lobes, 179 

 Pedalion, 328, 330, 332, 335 

 Pedata, 413*, 434 



Pedicellaria, 377, 381, 387, 394, 417 

 Peiliedlina, 348, 354, 355 

 Pedipalpi, 653 

 Pedipalpida, 660*, 662, 663, 668, 070, 



673 

 Peduncle, 205* 

 Pelagia, 184 

 Pellicle, 88 

 Pelomyxd, 49 

 Pelagic, 8* 

 PrJaiphydi-a, 148 



Pelecypoda, 680 : Example, 680 : Dia- 

 tincu\-e Characters and classification, 

 694* : General organisation, 696 : Ad- 

 ductor muscles, 697 : Shell, 697 : 

 Siphons, 698 : Foot, 701 : Byssus 

 gland, 702 : Gills, 702, 704 : Digestive 

 organs, 704 : Excretory organs, 705 : 

 Circulator}' organs, 706 : Nervous 

 system, 706 : Sense organs, 707 : Re- 

 production and development, 708, 709, 

 710 : General remarks, 710 : Mutual 

 relationship, 712 

 Pelmatozoa, 413*, 434 

 Pehogaster, 565, 579 

 Pen, 795* 

 Pemnts, 569, 599 

 Penial seta;, 298, 304 

 Pennatula, 196, 197, 198, 199, 204, 208 



Pennatnlacea, 195*, 197, 199, 2o4 

 Peutaerinoid larva, 410, 433 

 Penlacrinus, 410 



Pentastomida — See Linguatulida 

 Pentastomiiin fwuioideit, 674 

 Peptones, 34 

 Peptonephridia, 481* 

 Peracarida, 566*, 601 

 Perforate corals, 207* 

 Pericardial sinus, 533* 

 Perichondrium, 27* 

 Perkolpa, 179, 180 

 Perihfemal system, 380* 

 Periosteum, 28* 

 Periostraciim, 683* 



Peripatus, 526, 607 : External features, 

 607, 608 : Body-wall and body-cavity, 

 608 : Enteric canal, 608 : Circulatory 

 system, 609 : Organs of respiration, 

 609 : Coxal and slime glands, 609 ; 

 Nervous system, 609 : Nephridia, 610 : 

 Reproductive organs, 610 ; Develop- 

 ment, 611,612,613: Distribution, 612: 

 Relationship, 612 

 PenpafKs capemis, 607, 608, 609, 610, 



613 

 Pcripn'us novii'-ZKafaiidin', 611 

 PeiiphyUu, 179 



PbRIPLANETA AMERICANA, 619, 620 ; 

 Head, 620, 621 : Neck, 622 : Thorax, 

 622 : Abdomen, 622 : Respiratoiy 

 movements, 623 : Muscles, 624 : Hiemo- 

 oo?le, 624 : Digestive system, 624, 

 625 : Renal organs, 625 : Heart, 625 : 

 Respiration, 626, 627 : Nervous system, 

 626, 627 ; Organs of special sense, 627 : 

 Reproductive organs, 627, 628: De- 

 velopment, 628, 629, 630 ; Systematic 

 position, 636 

 Periplaneta orienialix, 620, 621 

 Periproct, 394* 

 Perisarc, 130, 131* 

 Perisaltic movements, 36*, 445 

 Peristome, 92, 95, 96, 185*, 380*, 394* 

 Peristomium, 441*, 455, 469 

 Peritoneum, 442* 

 Peritrichous, 92*, 96 

 Perivisceral cavity, 442* 

 Periwinkles, 680 

 Peromedusse, 180 

 Per-radius, 139* 

 Petaloid ambulacra, 422 

 Petasv-S, 154 

 Petrarca, 565, 579 

 Phaoella;, 172* 

 Phacops fecmidiif:, 606 

 Phaiodium, 61, 62 



Phalangida, 661*, 665, 667, 669, 670 

 Phanerocephala, 465*, 466, 476, 484, 



488 

 Phanerozonla, 411* 

 Pharynx — See Digestive system 

 Phasmida; 636, 653 



