830 



INDEX 



Paramithrax, 601 



Paramitome, 15" 



Paramylum, 68* 



Paranaspides, 566, 582 



Paranephrops, 569 



Parasitism, Protozoa, 72, 81, 82, 85, 87, 

 95: Hydrozoa, 167: Mesozoa, 230: 

 Rotifera, 335 



Parenchyma, 236*, 264, 351 



Parenchyma muscle, 265 



Parenchymula, 124* 



Parthenogenesis, 21*, 40*, 287, 647 



Parthenogonidium, 75* 



Parthenope, 591 



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

 752, 753, 754 



Paraseison asplanchnwt, 329 



Parazoa, 105 



PateHiddK, 733 



Pauropoda, 614*, 618 



Pauropus, 614, 615, 617 



Paxilla, 414 



Peachia, 202 



Pea-crab, 602 



Pearl-mussel, 710 



Pearl-oyster, 696 



Pearls, 711 



Pebrine, 87" 



Pectf.n, 696, 697, 700, 708, 710 



Pectines, 655* 



Pectinibranchia, 733,* 744 



Pedal gland, 725* : Lobes, 179 



Pedalion, 328, 330, 332, 335 



Pedata, 413*, 434 



Pedicellaria, 377, 381, 387, 394, 417 



Pedicellina,'348, 354, 355 



Pedipalpi, 653 



Pedipalpida, 660*, 662, 663, 668, 670, 

 673 



Peduncle, 205* 

 Pelagia, 184 



Pellicle, 88 



Pe/omyxa, 49 



Pelagic, 8* 



Pelagokydra, 148 



Pelecypoda, 680 : Example, 680 : Dis- 

 tinctive 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 : 

 Circulatory organs, 706 : Nervous 

 system, 706 : Sense organs, 707 : Re- 

 production and development, 708, 709, 

 710 : General remarks, 710 : Mutual 

 relationship, 712 

 Pehnatozoa, 413*, 434 

 Peltogaster, 565, 579 

 Pen, 795* 

 Penceiis, 569, 599 

 Penial setae, 298, 304 

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



Pennatulacea, 195'", 197, 199, 204 

 Pentacrinoid larva, 410, 433 

 Pentacrinu8 t 410 



Pentastomida See Linguatulida 

 Pentaatomum f<t j nioides, 674 

 Peptones, 34 

 Peptonephridia, 481* 

 Peracarida. 566*, 601 

 Perforate corals, 207* 

 Pericardial sinus, 533* 

 Perichondrium, 27* 

 Pericolpa, 179, 180 

 Periha?mal system, 380* 

 Periosteum, 28* 

 Periostracum, 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 



Peripatus capensis, 607, 608. 609, 610, 

 613 



Peripa'u.s novce-zealandice, 611 



Periphylla, 179 



PERIPLANETA AMERICANA, 619, 620 : 

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

 622 : Abdomen, 622 : Respiratory 

 movements, 623 : Muscles, 624 : Hsemo- 

 ctele, 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 oriental I*, 620, 621 



Periproct, 394* 



Perisarc, 130, 131* 



Perisaltic movements, 36*, 445 



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



Peristommm, 441*, 455, 469 



Peritoneum, 442* 



Peritrichous, 92*, 96 



Perivisceral cavity, 442" 



Periwinkles, (iSii 



Peromedusae, 180 



Per-radius, 139* 



Petaloid ambulacra, 422 



Petasus, 154 



Petrarca, 565. 579 



Phacellaj, 172* 



Phacops fecundus, 605 



Phreodium, 61, 62 



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



Phanerocephala, 465*, 466, 476, 484, 

 488 



Phanerozonia, 411* 



Pharynx See Digestive system 



PhasmidcB, <>36, 653 



