456 
Orgyia, 353 
Orthonectidae, 1385 
Orthoptera, 335 
Orthoptera genuina, 336 
Oscarella, 39, 41, 48, 45 
Osphradium, 189, 196, 
220 
Ostracoda, 261, 275, 278, 
280 
Ostrea, 190 
Ostreidae, 192 
Oxyuris, 125, 129 
PAEDOGENESIS, 373 
Paguridae, 286, 289, 298 
Palaemon, 288 
Palaemonetes, 289 
Palaeonemertine, 120 
Palinurus, 290 
Paludicella, 184 
Paludina, 204 
Papilio, 355 
Paractinopoda, 251 
Paraglossae, 376 
Paramoecium, 28, 29 
Paramylum, 23 
Paranebalia, 280 
Paranucleus, 28 
Parapodia, 151 
Parasitica (Hemiptera), 
369 
Parasitica, 265, 269 
Parasitism, 33, 112, 115, 
194. S128 37 eles 
204, 235, 240, 271, 
298 
Patella, 197 
Pauropus, 318 
Pecten, 192, 195, 208 
Pectines, 397 
Pedicellaria, 226, 241 
Pedicellina, 186 
Pediculus, 369 
Pedipalpi, 403 
Pelagia, 63 
Pelagic, 58, 115 
Pelagonemertes, 115 
Pelomyzxa, 10 
Penella, 269 
Pennatula, 73, 74 
Pennatulidae, 73 
Pentacrinus, 236, 237,239 
Pentamera, 357 
Pentatomidae, 364 
Perforata, 13, 68 
Perichaeta, 145, 146, 149 
Peripatus, 121, 148, 257, 
289, 300 
Peripharyngeal bands, 439 
Periplaneta, 336 
ZOOLOGY 
Perisare, 47, 51 
Peritricha, 26 
Peronia, 60 
Peronia, 208 
Perradii, 61 
Petrarca, 278 
Phagocytes, 40 
Phalangida, 416 
Phalangium, 417 
Phascolion, 160, 166 
Phascolosoma, 160, 166 
Phasma, 337 
Phasmidae, 337 
Pholas, 191 
Phosphorescence, 26, 74, 
77, 235 
Phronimidae, 293 
Phryganidae, 349 
Phrynus, 404 
Phryzus, 298 
Phyllactolaemata, 184 
Phyllirhoe, 207 
Phyllium, 337 
Phyllodrania, 336 
Phyllopoda (Cirrhipedia), 
254, 268, 280, 282 
Phylloxera, 366 
Phymosoma, 160, 161 
Physalia, 58, 59 
Phytophaga, 378 
Phytoptidae, 421 
Pieridae, 355 
Pieris, 351 
Pilulina, 12 
Plagiostoma, 94 
Planaria, 81, 95, 183 
Plasmodium, 5, 6, 7 
Platyhelminthes, 34, 80 
Pleurobranchus, 206 
Plumatella, 179, 182 
Plumularidae, 56 
Plusiidae, 353 
Pneumatophores, 59 
Pneumodermon, 208 
Podura, 333 
Podurinae, 333 
Polia, 123 
Polian vesicles, 232, 234, 
243 
Polistes, 384 
Pollicipes, 273 
Polycelis, 81 
Polycladida, 90, 91, 143 
Polychaeta, 138, 150 
Polyeystidae, 34 
Polyergus, 382 
Polygordius, 138 
Polymorphism, 158, 448 
Polynoe, 156, 158 
Polyophthalmus, 157 
Polypide, 180 
Polystoma, 107, 111 
Polythalmia, 13 
Polytoma, 25 
Polyxenus, 315 
Polyzoa, 56, 179, 259, 293 
Polyzosteria, 336 
Pontobdella, 132, 1384 
Pontodrilus, 145 
Porifera, 36 
Portunion, 298 
Proboscidea, 122 
Proctodaeum, 78, 279 
Proglottis, 97, 100 
Pronotum, 324 
Proporus, 94 
Proscolex, 101, 105 
Prosobranchiata, 197 
Prosoma, 389 
Prosopyles, 38 
Prosorhochmus, 122 
Prostomium, 78 
Proteolepas, 278 
Proteomyxa, 6 
Proterospongia, 24 
Protococeus, 23 
Protodrilus, 138, 139 
Protomyxa, 6, 25 
Protophyta, 3 
Protoplasm, 1 
Prototracheata, 300 
Protozoa, 3, 5 
Pseudocoel, 79 
Pseudonavicellae, 35 
Pseudopodia, 5, 6, 9 
Pseudoscorpionida, 401 
Pseudotetramera, 357, 360 
Pseudotrimera, 357, 361 
Psolus, 246 
Psyche, 353 
Psychidae, 350, 353 
Pteromalus, 380 
Pterophoridae, 351 
Pterophorus, 351 
Pteropoda, 207 
Pterotrachea, 204 
Pulex, 371 
Pulicidae, 371 
Pulmonata, 205, 208, 288 
Pulsellum, 23 
Pulvillus, 371 
Pupa coarctata, 361, 371 
Pupa libera, 331, 351, 357 
Pupa obtecta, 351, 371 
Purpura, 203 
Pyralidae, 352 
Pyrosoma, 293, 450 
RapDicoia, 366 
Radiolaria, 18, 20 
