INDEX 



831 



Pheronema carpenteri, 120, 123 

 'Philodina, 328, 331, 334 

 Pholas, 696, 700, 711 

 Phoronida, 340, 355* 

 Phoroni#, 355, 356, 357, 358, 359 

 Phragmoceras, 803 

 Phragmocone, 795*, 796 

 Phreatoicus, 568 

 Phronima, 585, 586 

 PhrymiM, 663 



Phylactolsemata, 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, 119 

 Pilema, 183 

 Pilidium, 295 

 Pill-bug, 586 

 Pinna, 696, 702 

 Pinnotheres, 602 

 Pinnules, 407* 

 Piscicola, 516, 522 

 Placophora, 713*, 715, 716, 717, 718, 



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 



Planaridce, 253 

 Plankton, 8* 

 Planorbulina, 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 

 Pleurobrachiidce, 221 

 Pleurobranchia, 550, 551* 



Plenron, 541 ; 



Pleurophyllidia, 742, 743 



Ploima, 328*, 329, 330 



Plinniitilln, 348, 349 



riiuiilri, 149 



Pluteus, 400, 411, 412, 431, 432 



Pneumatophore, 159* 



Podical plates, 623* 



Podobranchia, 550" 



Podomere, 526* 



Podophrya, 99, 100 



Podura,632, 633 



Polar body, 19*, 20 



Polar plates, 216* 



Polian vesicle, 383*, 399, 402, 426 



Pollicipea, 579 



Polyarthra, 328, 330, 331 



Polyce/i*, 255 



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

 480, 481, 483, 484, 485, 486, 488, 48!) 



Polycladida, 252*, 255, 256, 257, 263, 

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



Polycolpa, 154 



Polydora, 488 



Polygordiidce, 503 



Polygordius lacfens, 504 



Polygordius neapolitanus, 503. 504, 505 



Polykrikos, 78, 79 



Polymorphism, 141* 



Polynesian region, 9* 

 Polynoe, 469, 484 

 Polynoe extenuata, 471 

 Polynoe setosissima, 467 

 Pojynoidce, 467, 481 

 Poti/'<<<-, 77, 78 

 Polyophthalmus, 479 

 Polype, 129*, 148 

 Polyphemus, 564, 572 

 Polyphyletic, 286* 

 Polypodium, 167 

 Polyspermy, 21* 

 Polystomatous, 183* 

 Polystomcd', 257, 258 

 Polystomella, 55 

 Polystomum, 258, 277, 284 

 Polytrochal, 486* 



Polyzoa, 340* : Example, 341 : Distinc- 

 tive characters and classification, 347 : 

 Sec Ectoprocta and Endopro<-t<t 

 Polyzoa (Cestoda), 25.'{- : 

 PonteUinn mediterranea, 0<JO 

 Pontobdella, 51 li, 517, 518, 520 

 PorcellniKi. 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, affinities, 



&c., 126, 22s 

 Porocyte, 109*, 124 



3 G 2 



