INDEX. 



423 



North Sea investigations, southern 

 species of tish entering at the 

 north, 252 



southern sjiecies of fish entering 



from the south, 247 



Notes and Memoranda, 73 



Nutting, C. C, see Contents 



0. 



Obelia, 175 



— (jenicidata, 147 



— longissima, 147 



— lucifem, 170 

 Odorchis, 169 

 Oikopleura dioica, 175 

 Oithona s2)inirostris, 174-177 

 Opercularella hispida, n. sp., 148 



— lacerata, 148 

 Ophiadis Balli, 165 

 Vphiura ajfinis, 165 

 Orthaywiscus mola, 379 

 Oscillataria rosea, 286 

 Odreobium Qtieketti, 179 

 Otter trawl, 114 



Oxygen dissolved in sea water, 235, 



238 

 Oa:yrhync}i((, 396 

 Oyster beds of Firth of Forth, 374 



— culture, modern system, 363 

 Oyster culture of Romans, 360 

 Oysters, regulations regarding, 393 



Pandarus bicolor, 159 

 Paracalamis parvus, 174, 382 

 Parapjhdlia expansa, 165 

 Parasitic copepods on fish, 155 

 Paruthemisto oblivia, 236 

 Parophrys qiutdrituberculatus, 331 

 Pelagic fauna, 168, 172 

 Penella sayitta (?), 160 

 Periwinkles, close season for, 395 

 Peyssonelia Harveyana, 287 



— Rosenvinyii, 287 



— rupestris, 286 

 Phmoplujcen, 179, 286 

 Phialidium, sp., 50 

 Phormidium persicinum, 179 

 Phyllophora Traillii, 180 



Pigment on the lower sides of llat- 

 fishes, 53 



I'ilidium, 170 



Plaice of North Sea compared with 

 other regions, 326 



— difterence in size in Start Bay ami 



Teignmouth Bay, 94 



— distribution, 330 



— experiment on a piebald, 58 



— food of, 19, 216 



— in Danish waters, 213 



— length and age, 136 



— Natural History of, 15 



— ovaries, 37, 47 



— ^^'^'-^^li^^'ities on different fishing 



grounds, 315 



— protective measures for, 25, 217 



— rate of growth, 214 



— spinulation of the scales, 323, 342 



— tables showing variation, 344-359 



— undersized, 22, 138 



Plankton of Skagerack and Cattegat, 



382 

 • — procured by pumping, 385 

 Platcsaa dcinensis, 333 



— ylabra, 333, 340 



— passer, 340, 354 



— quadrituberculata, 331 

 Platichthys stcllatus, 341 

 Platyonidius nasutus, 402 

 Pledonema terebrans, 179 

 Pleuronedes asperrimtcs, 341 



— Boydanovii, 341 



— cicatricosus, 341 



— flesus, distribution, 338 



— Franklinii, 333 



— ylaber, 333 



— ylacialis, 297, 330, 333, 354 



— italicus, 340, 354 



— luscus, 340, 354 



— Pallasii, 331, 332 



— pseudoflesus, 293, 297 



— quadrituberculatus, 331 

 Plumularia Alleni, n. sjk, 1.')3 



— halecioides, 83, 152 



— pinnata, 149 



origin of sex cells, 1 5 1 



a sexual multiplication of, 152 



Plutei, 176 



Podon intermedius, 175, 176 



Polyyordius sp., 165 



I'dlynoi', 170 



Purtwmmis latipes, 402 



