772 



INDEX 



Pallium See Mantle 



Palpus, 4i i.") 



PaJiidicella, 320, 326 



Palus, 192* 



Palythoa, 116, 184 



Pancreas, 32* 



Pancreatic juice, 32* 



Pcmdoriiia, 67, 68. 69 



Papula, 393, 347* 



Parabranchia, 696* 



Paragaster, 97* 



Paraglossa, 589 



Paragnatha. 488*, 506 



Paramcecidce, 82 



PARAMCECIUM, 79, 80, 81 : Systematic- 

 position, 82 



Paramithrax, 555 



Paramitome, 15* 



Paramylum, 64* 



Parapodium, 403, 404*, 405. 430 



Parenchyma, 222, 249 



Parthenogenesis, 38*, 266 



Parasitism, Protozoa. 90, 93 



Parthenogonidium. 70* 



Parthenope, 541 



Pattlln. 6S5. 686. 691. 693. 694. 695, 696. 

 698, 701 



Patellidii', 683 



Pauropoda, 567'", 570 



Pauropus, 567 



Paxilla, 386* 



Peachia, 189 



Pearl-oyster, 647 



Pecten-, 647, 648, 658. 659, 661 



Pectinibranchia. 683" 



Pedal gland, 688* 



Pedalion, 306, 307, 304, 491 



Pedata, 379* 



Pedicellaria, 348*. 357, 36.3, 383, 389 



PedireMna, 320, 326. 327 



Pedipalpida, 611*, 613, 619, 621 



Pelayia, 171 



Pelagic, 8* 



Peltoyaxfer, 534 



Pen, 742 



Pen-cam, 553 



Pennntula, 185, 186. 191, 195 



Pennatulacea, 182*, 184. 191 



Pentastomida See Linguatulida 



Pentastomum tcenioides, 625 



Peptones, 32* 



Perforate corals, 194* 



Pericardial sinus, 509* 



Perichondrinm, 25'' 



Periro/pn, 167 



Periosteum, 26* 



Periostracum, 634* 



PERIPATCS, External features, 559, 560 : 

 Body-wall and body-cavity, 561 : En- 

 teric canal, 561 : Circulatory system, 

 561 : Organs of respiration, 562 :"Coxal 

 and slime glands, 562 : Nervous 



system, 562 : Nephridia, 562 : Repro- 

 ductive organs, 562 : Development, 

 563 : Distribution, 566 : Relationship. 

 566 



PERIPLANETA AMERICANA, 571, 572 : 

 Head, 572 : Neck, 573 : Thorax, 574 : 

 Abdomen, 574 : Respiratory move- 

 ments, 575 : Muscles, 575 : Co?lome, 

 576 : Digestive system, 576 : Renal 

 organs, 577 : Heart, 577 : Respiration, 

 578 : Nervous system, 578 : Organs of 

 special sense, 579 : Reproductive 

 organs, 579 : Development, 580 : Sys- 

 tematic position, 587 



Perisarc, 121* 



Peristaltic movements, 34* 



Peristomium, 404*, 417, 432 



Peromedusae, 164*, 166. 167 



Per-radius, 129 



Petmrca, 534 



Phacops fecundits, 558 



Phteodium, 59 



Phalangida, 612*. 615, 621 



Phanerozonia, 37* 



Pharynx See Digestive system 



Phaxmidiv, 587 



Philcxlinn, 3( (3. 305, 309 



Pholax, 647. 661 



Phoronida, 313. 328 



Phoroni*, 328, 329. 330, 343, 344 



Phragmoceras, 75n 



Phragmocone, 742 



Phranima, 545, 546 



Ph/'i/t/ii-y, 613 



Phyiactolaemata, 320, 321, 322, 323. 324. 

 325, 326, 343, 344 



Phyllocarida, 523*, 535 



Phyllopoda, 521* 



Pliyllosoma, 553 



Phylogeny, 8* 



Phylum, 5*, 41 



Physalia, 151, 152 



Physiology, 9* 



Fieri*, 586 



Pilema, 170 



Pilidium, 272, 273 



Pill-bug, 524 



Pinna, 647, 653 



Pinnothere*, 556 



P'lxricoln, 476, 481 



Placophora, 663*, 751, 665, 666, 667, 668, 

 671 



PL AN ARIA, 222 : General features, 222, 

 226 : Digestive system, 222, 223 : 

 Water vessels, 223, 224 : Nervous 

 system, 223, 224 : Reproductive sys- 

 tem, 224, 225 : Systematic position, 

 238 



Plankton, 8* 



J'/ti>iiirli/>n'i, 53 



Plant-lice, 5s.~> 



Planula, 129*, 130. 141*. 161 



