INDEX 



557 



Nemura, 440 



Nepa, 440 



Nephelis, 181 ; vascular system, 249 



Nephridia, 235 ; as ducts for sexual pro- 

 ducts, 243 ; excretory organs, 243 ; per- 

 manent, 239 ; phylogenetic origin of, 

 247 ; provisional or embryonic, 237, 

 238 



Nephroblasts, 279 



Nephrops, 298 



Nephthys, 182 



,, scolopendroides, 251 ; section, 

 252 



Nereidce, 182 



Nereis cultrifera, 239 



Nerocila, 295 



Neural plate, 167 



Neurilemma, 52 



Neuroblasts, 278 



Neurochord (Vermes), 222 ; (Crustacea), 

 351 



Neuroptera, 441 



Nicoletia, 439 



Noctiluca, 8 



,, miliaris, 9 



Noctuiformes, 44$ 



Noctuina, 442 



Non-Calcarea, 60 



Notodelphys, 291 ; trunk feet, 316 



agilis, anterior maxillae, 312 



,, Almannii, mandibles, 311 



Notodontidce, 442 



Notoinastus, 181 



Notommata, 185 



Notonecta, 440 



Notopoda, 299 



Notopygos, 182 



Nucleus, 1 



Nuda, 72 



Nycteribia, 443 



Nymphalidoe, 44% 



Nymphon, 4%4 



,, hispidum, 423 



OBELIA geniculata, 68 

 Obisium, 509 



,, silvaticum, heart, 527 

 Ocellata, 97 

 Ocelli, 469 



Ocneria, mouth parts, 448 

 Octocorallia, 70 

 Ocypoda, 300 

 Odonata, 439 

 Odontoblasts, 45 

 (Ecanthus, 454 

 CEdemeridce, 441 



(Edipoda, 439 ; sexual organs, 485 

 (Estridce, 443 

 Olenus, 415 



Oligochceta, 181 ; nephridia, 240 

 Oligodadus, 146 

 Olindias Mulleri, 69 

 Olynthus, 60, 62 



Ommatidium, 353, 471 

 Ooecia, 264 

 Ootype, 159 

 Oniscidce, 295 

 Onychophora, 4%7 

 Operculum, 417 

 Opheliacea, 181 



Ophrydium, 11 

 Opisthotrema, 162 

 Orbitelarice, 510 

 Orchestra, 296 



,, cavimana, 294 

 Oribatidce, 510 

 Orthezia, 463 

 Orthonectidce, 58 

 Orthoptera, 4^9 ; sexual organs of larva 



485 

 Oscarella, 61 



,, lobularis, section, 65 

 Osculosa, 7 

 Osteoblasts, 45 

 Ostia, 358 

 Ostracoda, 290 

 Oxycephcdus, 296 

 Oxyrhyncha, 299 

 Oxystomata, 299 

 Oxytricha, 9 

 Oxyuris vermicularis, 180 



PACHYDRILUS, 181 

 Psedogenesis, 502 

 Paguridce, 298 

 Palcemon, 298 



,, Squilla, eyes, 354 

 Palceonemertina, 178 

 Palingenia, 439 

 Palingenesis, 118 

 Palinuridce, 298 

 Palinurus, 298 



,, Phyllosoma of, 395 

 Pallene, 424 

 Palpons, 112 

 Paludicella, 184 

 Pandorina, 8 

 Panorpata, 441 

 Pantopoda, 422-425 

 Paradesmus gracilis, 459 

 Paradoxides, 415 

 Paragnatha, 315 

 Paramcecium, 9 



,, aurelia, 17 



Paranebalia, 293 



,, longipes, anterior maxillae, 



312 ; posterior maxillae, 



313 



Parapodia, 188 

 Parasitism, 172 

 Parthenogenesis (Vermes), 266 ; (Insecta), 



501, 502 



Parthenogonidia, 21 

 Pauropoda, 438 

 Pedicellina, 184 ', larva, 271 



