558 



COMPARATIVE ANATOMY 



Pediculidce, 440 



Pedipalpi, 509 



Pedipalps (Arachn.), 515 



Pedunculata, 292 



Pegantha, 69 



Pelagia noctiluca, 72 



Peltogaster, 292 



Penaeus, 298 ; posterior maxillae of larva, 



313 ; older larvae, 392 

 Penella, 291 

 Pennatula, 70 

 Pentamera, 441 

 Pentastomidce, 510 

 Pentastomum, 510 



,, denticulatum, 511 



, , tcenioides, 510 ; nervous sys- 



tem, 520 ; sexual organs, 

 533, 534, 537 



Pentatoma, 440 ; mouth parts, 451 

 Perforata, 4 

 Perichceta, 181 



mirabilis, 240 

 Pericolpa, 72 

 Peridinium, 8 

 Peripatus, 437 



,, capensis, 4^7 ; anatomy, 430 ; 

 anterior bo4y, 429 



, , Edwardsii, 437 ', embryo, 435 ; 

 head, 427 ; nephridia, 431 ; 

 section of segment, 428 ; 

 sexual organs, 436 



,, Leuckartii, 1$7 



, , Novce Zealandice, J$7, 427 

 Periphylla, 72 

 Periplanata, 439 

 Peripneustic tracheal system, 482 

 Peritricha, 11 

 Perlaria, 440 

 Peromedusce, 71 

 Peronia, 69 

 Perradii, 74 

 Phacelli, 78, 85 

 Phacops, 415 

 Phceodaria, 7 

 Phaeodium, 7 

 Phagocytes, 500 

 Phalangidce, 509 ; heart, 527 

 Phalangium opilio, sexual organs, 533, 534 

 Phalansterium, 8 

 Phascolion, 244 

 Phascolosoma, 183 

 Phasmidce, 439 

 Phialidium varidbile, 68 

 Philodromus, 510 



Philoica domestica, sexual organs, 534 

 Philopterus, 440 

 Pholcus, 510 



,, phalangoides, heart, 527 

 Phoronidce, 183 

 Phoronis, 183 ; larva, 272 

 Phoxichilidium, 424 

 Phractaspis, 6 



,, prototypus, 6 



Phreatothrix, 240 



Phreoryctidce, 181 



Phronima, 296 



Phryganea, 441 



Phrynus, 509 



Phthirius, 440 



Phylactolcemata, 184 



Phyllacanthidce, water- vascular system, 153 



Phyllium, 439 



Phyllobothrium, 134 



Phyllobranchiaa, 328 



Phyllodocidce, 182 



Phyllopoda, 288 



Phyllosoma larva, 395 



Phylloxera, 440 



Physalia, 70 



Physemaria, 58 



Physonecta, 70 



Physophora, 70 



Physopoda, 440 



Phytometridoe, 442 



Phytophthires, 440 



Phytoptidce, 510 



Pilema, 72 



Pilidium larva, 274, 275 



Pilumnus, 300 



Pinnoteres, 300 



Pisa, 299 



Piscicola, 240 



Plagiostoma, 134 



Plakina, 61 



Planaria, 133 ; ovary, 29 



Planocera, 133 ; pharynx, 139 ; intestinal 



and nervous system, 141 

 Planula, 129, 130 ^ 

 Platodes, 133-172 

 Platydeis, 439 

 Platyscdus, 296 

 Plecoptera, 440 

 Pleon, 301 

 Pleopoda, 315, 322 

 Pleura, 414 



Pleurobranchiae, 328, 327 

 Pleurochceta, 181 

 Plumatella, 184 



,, repens, 208 

 Plumularia, 68 

 Plusiada, 442 

 Pneumatophore, 70, 108 

 Podobranchiae, 328, 327 

 Podoconus, 7 

 PodocoTgjne carnea, 68 

 Podopfrrya, 11 



,, gemmipara, 11 

 Podophthalmata, 296 

 Podura, 439 

 Pcecilopoda, 417 

 Polar bodies, 31 

 Polia, 178 

 Pollicipes, 292 

 Polychceta, 181 

 Polydadidce, 133 

 Polycystidce, 9 



