582 



INDEX 



A", natrix, 64, 501 

 Natterer, 174 

 Nauman, 343, 357 47 , 420 122 

 Nautilus, 103, 126, 226, 253, 268 

 Nebalia galatea, 190 

 Nebria, 499 



Nectar-feeding, birds, 405 

 Nectarinia famosa, 456 

 Needham and Lloyd, 318 5 

 Nehring, 119 2 ' 9 , 468 12 ' 66 

 Nekton, 233 

 Nemachilus, 312, 317 

 Nemastoma lugubre, 527 

 Nematoscelis mantis, 257 

 Nemorhaedus, 435, 503 

 Neoceratodus, 53, 114 

 A. forsteri, 126 

 Neolamprina, 109 

 Nepa, 299, 300 

 Nephrops, 53, 224 



Nephthys, 191, 192, 283 



Neptunea, 195 



Nereis, 196, 283 



A. cultrifera, 196 



AT. diver sicolor, 13, 25, 29, 30 

 in brackish waters, 167 



Nerita, 202, 204 



N. funiculata, 203 



Neritella fluviatilis, 312 



Neritic pelagial, 241 



Neritic region, 177 



Neritina, 290, 310 



Nerophis, 181 



A. ophiodon, 285 



Nesomimus, 88 



Nesotragus, 423 



Aesfor, 389 



Netolitzki, 503 11 



Nets for plankton feeding, 237 



Neumayr, 22 26 



Neuston, 233 



New Zealand, amphibian and reptile 

 fauna, 132 

 comparison of North and South Is- 

 lands, 389 

 increase in insects, 19 

 introductions in, 552 

 littoral fishes, 81 

 vicarious faunae, 78 

 Ngami, Lake, 85 



Niche, 135 



Nile, fish fauna, 26 



marshes of, 475 

 Nilsson-Cantell, 163 

 Niphargus, 13, 527, 531, 532, 533, 535 

 N. puteanus, 333, 374 

 Nitches, multiplicity in fresh water, 294 

 Nitrogen compounds, 169 

 Nitrogen content of sea water, 172 

 Noack, 419 48 

 Noble, 119 27 , 537 21 

 Noctilio leporinus, 67 

 Nodiluca, 225, 242, 255 

 Nocturnal concert in the tropics, 430 

 Noel, 504 35 

 Noll, 37Q 42 

 Nolte, 287 63 



Nomophila noctuella, 128 

 Nordenskjold, 363, 376 24 , 504 34 , 514 6 

 North America, 538 

 North Sea, benthos, 195 

 distribution of nitrogen, 169 

 herrings, 133 



Norway rat, 122 



Norwegian fiords, absence of oxygen, 18 

 hydrogen sulphide in, 174 



Notholca longispina, 339 



N. striata, 337 



Notiodrilus, 113 



Notomma, rate of development, 15 



Notonecta, 85, 279 



A. glauca, 66 



Notorycles, 79 



Novius cardinalis, 553 



Nucula, 264 



A. tenuis, 192, 194 



Number of species, 147 

 and of individuals, 30 

 of insects, 28 

 reduction with depth, 25 



Nutting, 269 16 



Nyctea nyctea, 510 



Nymphaea, 327, 348 



Nysius, 508 



Oar-shaped limbs in pelagic animals, 232 



Oberg, 287 62 



Obi, fish fauna, 26 



Obi River,' 291 



