INDEX 



831 



Phtroiiemii ao-jjentai, I'iO, 123 



Philodina, 328, 331, 334 



Pholas, 698, 700, 711 



Fhoronida, 340, 3o5* 



Phoronis, 355, 356, 357, 368, 359 



Phragmoceras, 803 



Phragmocone, 795*, 796 



Phreatolcus, 568 



Phronima, 585, 686 



Phrynns, 663 



Phylaotolaemata, 348*, 349, 351, 352, 353 



Phyllocarida, 566*, 580, 581, 594, 596, 



601, 603 

 Phyllodoce paretti, 479 

 Phyllosoma, 600 

 Phylogeny, 8* 

 Phylum, 5*, 43* 

 Physalia, 163 

 Physiology, 9* 

 Pieris, 635 

 Pigment, 68, 1 19 

 Pilema, 183 

 Pilidium, 295 

 Pill-bug, 586 

 Pimm, 696, 702 

 Pinnotheres, 602 

 Pinnules, 407* 

 Piscicola, 516, 522 



Placophora, 713*, 715, 716, 717, 71S, 

 720, 721 



Planaria, 236 : General features, 236, 

 237, 240 : Digestive system, 236, 237 : 

 Water vessels, 237, 238 : Nervous 

 system, 237, 238 : Reproductive sys- 

 tem, 238, 239 : Systematic position, 

 253 



Planaridii', 253 



Plankton, 8* 



Planorhulina, 53 



Plant lice, 634, 647 



Planula, 139*, 140, 153, 173, 192 



Plasma, of blood, 30 



Plasmodium, 30*, 66, 67 



Platoum stereo eum, 51 



Platyctenea, 226* 



Platyhelminthes," 235, 251* : Examples, 

 236, 240, 245 : Systematic position, 

 253 : General external features, 254 : 

 Integument and muscular layers, 262, 

 264: Parenchyma, 264, 265 : Alimen- 

 tary systems, 265, 266, 267 : Nervous 

 system, 266, 267 ■ Water vascular 

 system, 269 : Reproductive organs, 

 270, 271, 272: Development, 273, 274, 

 275, 276, 277, 278, 280, 281, 282, 379 : 

 Asexual reproduction, 283 : Distribu- 

 tion occurrence and relationships, 283 : 

 Appendix, 288 

 Platypoda, 733*, 734 

 Pleopod, 542* 

 Pleurobrachia, 211 

 Pleurohrachiidce, 221 

 Pleurobranchia, 550, 551* 



Pleiiron, 541* 



PhiiroijhyUidia, 742, 743 



Ploima, 328*, 329, 330 



Plumatella, 348, 349 



Plumuldria, 149 



Pluteus, 400, 411, 412, 431, 432 



Pneumatophore, 159* 



Podical plates, 623* 



Podobranchia, 560* 



Podomere, 526* 



Podoplmja, 99, 100 



Podura, 632, 633 



Polar body, 19*, 20 



Polar plates, 216* 



Polian vesicle, 383*, 399, 402, 426 



PoUicipes, 579 



Polyarthra, 328, 330, 331 



Polycelie, 255 



Polychaeta, 465*, 470, 471, 474, 478, 479 



480, 481, 483, 484, 485, 486, 488, 489 

 Polycladida, 252", 255, 256, 257, 263, 



264, 266, 267, 268, 271, 273, 274, 287 

 Polycolpa, 184 

 Polydora, 488 

 PolygordiidiM, 503 

 Polygordiiis lacteufi, 504 

 Polygordius neapolitanns, 503, 504, 505 

 Polykrikos, 78, 79 

 Polymorphism, 141* 

 Polynesian region, 9* 

 Polyniie, 469, 484 

 Polynoe extenuata, 471 

 Polyniie setosisaiTna, 467 

 Polynoidw, 467, 481 

 Polynca, 77, 78 

 Polyophthalmns, 479 

 Polype, 129*, 148 

 Polyphemnn, 564, 572 

 Polyphyletic, 286* 

 Polypodium, 167 

 Polyspermy, 21* 

 Polystomatous, 183* 

 Polystomeip, 257, 258 

 PolyKtomella, 55 

 Polyslomum, 258, 277, 284 

 Polytrochal, 486* 



Polyzoa, 340* • Example, 341 : Distinc- 

 tive characters and classification, 347 : 

 See Ectoprvcta and Endoprocta 

 Polyzoa (Cestoda), 253* 

 PonteUina mediturranta, 600 

 Pontobdella, 516, 517, 518, 520 

 PorceUana, 569 

 Pore-membrane, 108, 109* 

 Porifera, Example, 105 : Distinctive 

 characters and classification. 111 . 

 General form and mode of growth, 

 114: Leading modifications of struc- 

 ture, 116: Histology, 119: Skeleton, 

 120 : Reproduction, 120 : Develop- 

 ment, 122 : Distribution, aflSnities 

 &c., 126, 228 

 Porocyte, 109*, 124 



3 G 2 



