IXDEX 



557 



X*' mum, 440 



, 440 

 helis, 1S1 ; vascular system, 249 



Nephridia, 235 ; as ducts for sexual pro- 

 ducts, 2-13 ; excretory organs, 243 ; per- 

 manent, 239 ; phylogeuetic origin of, 

 247 ; provisional or embryonic, 237, 

 238 



Nephroblasts, 279 



Xephrops, 29S 



A'ephthys, 1S2 



scolojiendroides, 251 ; section, 

 252 



Nereidce, 182 



Nereis cult r if era, 239 



Nerocila, 295 



Neural plate, 167 



Neurilemma, 52 



Neuroblasts, 278 



Neurochord (Vermes), 222 ; (Crustacea), 

 351 



Neuroptem, 441 



Xicoletia, 439 



Noctiluca, 8 



,, miliaris, 9 



Noctuiformes, 443 



Noctuina, 44? 



Non-Calcarea, 60 



Notodelphys, 291 ; trunk feet, 316 



,, agilis, anterior maxillae, 312 



,, Almannii, mandibles, 311 



Notodontidce, 44% 



Notomastus, 181 



Notommata, 1S5 



Notonecta, 440 



Xotyoda, 299 



Xotopygos, 182 



Nucleus, 1 



Nuda, 72 



Nycteribia, 44$ 



Nymphalidce, 44% 



Nymphon, 4~4 



,, hispidum, 423 



OBELI A geniculata, 68 

 Obisium, 509 



,, silmticum, heart, 527 

 Ocellata, 97 

 Ocelli, 469 



Ocneria, mouth parts, 448 

 Octocorallia, 70 

 Ocypoda, 300 

 Odonata, 439 

 Odontoblasts, 45 

 (Ecanthus, 454 

 (Edemeridce, 441 



(Edipoda, 439 sexual organs, 485 

 (Estridce, 443 

 Olenus, 415 



Oligochcela, 181 ; nephridia, 240 

 Oligocladus, 146 

 Olindias MilUeri, 69 

 Olynthus, 60, 62 



Ommatidium, 353, 471 

 Ooecia, 264 

 Ootype, 159 

 Oniscidce, 295 

 Onychophora, 427 

 Operculum, 417 

 Opheliacea, 181 

 Ophiusidce, 442 

 OphriHlium, 11 

 Opisthotrema, 162 

 Orbitelarice, 510 

 Orchestia, 296 



,, ca'cimana, 294 

 Oribatidce, 510 

 Ortheziu, 463 

 Orthonectidce, 58 

 Orthoptera, 439 ; sexual organs of larva 



485 

 Oscarella, 61 



,, lobularis, section, 65 

 Osculosa, 7 

 Osteoblasts, 45 

 Ostia, 358 

 Ostracoda, 290 

 Oxycephalus, 296 

 Oxyrliyncha, 299 

 Oxystomata, 299 

 Oxytricha, 9 

 Oxyuris vermicularis, ISO 



PACHYDRILUS, 181 

 Pffidogenesis, 502 

 Paguridce, 298 

 Falcemon, 298 



,, Squilhi, eyes, 354 

 Pa km nemertin a, 17 S 

 Palinyenia, 439 

 Palingenesis, 118 

 Palinuridce, 298 

 Palinurus, 298 



,, Phyllosoma of, 395 



Pallene, 424 

 Palpous, 112 

 Palmliedla, 184 

 Pandorina, 8 

 Panorpata, 441 

 Pantopoda, 422-425 

 Paradesmits gracilis, 459 

 Paradoxides, 415 

 Paragnatha, 315 

 Paramp-cium, 9 



,, aurelia, 17 



Paranebalia, 293 



,, longipes, anterior maxillae, 



312 ; posterior maxillas, 



313 



Parapodia, 188 

 Parasitism, 172 

 Parthenogenesis (Vermes), 266 ; (Insecta), 



501, 502 



Partheuogouidia, 21 

 Pauropoda, 438 

 Pedicellina, 184 ', larva, 271 



