44 8 



INDEX 



Odontoceti, 396-402 

 Oiling sheaves, 277 



wire ropes, 274, 279 

 Ommatophora, 406 

 Ophiura, 246 



Ophiuroidea. See Brittle-stars 

 Orbulina ooze, 214 

 Orca, 399 



Ornithocercus, 122 

 Ortmann's coastal regions, 253 

 Osmerus, 395 

 Osmic acid, 360 

 Ostracoda of bottom, 244 



of plankton, 178 



preservation, 379 

 Otariidae, 407-409 

 Otter trawl. See Trawl 



midwater, 341, 342 

 Oudemans on the sea-serpent, 



4*3 



Outfit, tropical, 105-112, 156 

 Oyster larva, 185 



Padina, 143 



Paguridae, 245 



Palinurus larva, 182 



Palolo, 241 



Pelagia, 172 



Pelagic (high-sea or oceanic) 

 deposits, 213, 216-223 

 fish eggs, 316-318, 322 



Pelamys, 410 



Pelvetia, 143 



Penaeus larvas, 181 



Peneidae, 264 



Peneroplis, 80 



Penicillus, 135 



Pennatula, 239 



Perforating algae, 135 



Peridiniales, 116, 120, 121 



Peridinium, 123, 164 



Petersen's young-fish net, 341- 



343 



Phaeophyceae, 127, 138 

 Phaeosporae, 138 

 Phialidium, 170 

 Phocidae, 403-406 

 Phosphorescence. See Lumin- 

 osity 



Photographic apparatus, 108 

 Phronima, 177, 178 

 Phyllophora, 133 

 Phyllosoma, 182, 183 



Physalia, 172, 174, 373 

 Physeter. See Sperm whale 

 Physonectae, preservation, 372 

 Phytoplankton. See Plants, 



floating 



Piano-wire, 277 

 Picric acid, in, 358, 359 

 Picroformol, 359 

 Pillsbury meter, 64 

 Pilot charts, meteorological, 4 

 Pinnipedia, 402-409 

 Pinnularia, 119 

 Planaria, 240 



Plankton, animal. See Animals, 

 floating 



plant. See Plants, floating 



as food, 163 

 Planktoniella, 118 

 Plants, Chapter IV., 113-161 



classification, 433 



fixed, 126-161 



collection, 152, 153, 



156. 157 



distribution, 132 

 economic utility, 161 

 environment, 128-132 

 orders of, 127 

 preservation, 157-161 

 shore regions, 128 

 floating, 113-125 



collection, 114-116 

 preservation, 116 

 Platanista, 402 



Pleurobrachia, 173, 175, 349, 374 

 Pluteus larvas, 186 

 Pollicipes, 78 



Polychaeta. See Chaetopoda 

 Polygordius, 176 

 Polysiphonia, 126, 150, 152, 154 

 Polystomella, 81 

 Polyzoa, 94 



bottom, 249 

 plankton, 184, 185 

 preservation, 380 

 Pontoporeia, 402 

 Porcupine, H.M.S., dredge, 289, 



296 



i Porifera. See Sponges 

 I Porphyra, 126 

 Porpita, 173, 373 

 Porpoises, 400 

 Portunus, 245 

 Postelsia, 142 



