GENERAL INDEX 



817 



Olter trawl, 41, 42, 63 

 Ox bone dredged, 202, 207 

 Oxidizing areas in the ocean, 187-188 

 Oxygen in sea-water, 253-258 

 Oyster "polls," 225, 226, 257-258, 478-480, 

 554, 555 

 shells, 202, 207 

 Oysters, 479-514. 555, 556 



Pacific Ocean, area of, 136, 137, 13S 



continental shelf and slope in, 136 



deepest sounding in, 17, 131 



deeps of, 139-143 



depths of, 131, 132, 136-138, 140-143 



number of soundings in, 131 



shore-slopes of, 137 

 Palagonite in deep-sea deposits, 153, 188- 



189 

 Pandalids, 585 

 Pasiph?eid9e, 585 

 Patellids, 467 



" Patrick Stewart," The, 20 

 Peake Deep, 196 

 Pediculati, 411, 609, 614 

 Pelagic animals, 561-659 



Arctic communities, 637-641 



Atlantic communities, 617-636 



boreal communities, 637, 644-656 



northern communities, 636-659 



appliances, 34, 45 



deposits, 161, 162-163, 167, 171, 426, 

 430, 716 

 Peneidae, 585, 586 

 " Penguin," The, 19, 141 

 Pennatulids, 109, 482, 503, 517, 538, 547 

 Percesoces, 389, 397, 607, 613 

 Perciformes, 401-405, 614 

 Percussion, bulbs of {see "Chatter-marks") 

 Peridinete, 65, 322-330, 346, 347, 348, 354, 

 355, 356, 358, 363, 365, 381, 382, 580, 

 674, 699, 719 



neritic, 344 



suspension organs of, 323 

 Periwinkles, 462, 477, 556 

 Permanence of oceanic and continental areas, 



10 

 Petersen's pelagic young-fish trawl, 36 



bottom-collector, 785 

 Petromyzontes, 611 

 Petromyzontidoe, 611 

 Pettersson's insulating water-bottle, 232 

 Pettersson-Nansen water-bottle, 40, 215, 



219, 220, 232, 233 

 Phillipsite, 159-160, 166, 190 

 Philonexidae, 597 



Phosphates {see Calcium phosphate) 

 Phosphatic concretions, 159, 162, 189, 192, 



193 

 Phosphorescence, 68, 86, 88, 94, 329, 673, 



674, 675, 680 

 Phosphoric acid, 368 



Photometer, Helland-Hansen's, 93, 94, 249- 



252 

 Regnard's, 252 

 Photometric observations, 94, 248-252 

 Physical oceanography, 210-306 

 Phytoplankton, 60, 61, 94, 117 

 Pigmentation {see Colours of marine animals) 

 Pilchards, 448, 601, 771, 782 

 Pilot-fishes, 91, 609, 633, 670, 698 

 Pipe-fishes, 606 

 Pisces {see Pishes) 

 Plagiostomi, 388, 390-393 

 Plaice, 440, 441, 442, 443, 451, 453, 454, 



712, 713, 759, 763, 785 

 eggs, 783 

 Planarians, 471 

 Planet Deep, 143 

 " Planet," The, 18, 141, 143 

 Plankton, 13, 37, 45, 65, 107, 108, 309- 



311, 338-340, 357, 358-366, 370-3S3, 



562-563, 772-776, 779, 782, 783 

 alga;, neritic species of, 340-346 

 oceanic species of, 346-349 

 "Plankton" Expedition, 15, 309, 315, 333, 



337, 564, 598, 652, 773, 777 

 Plant life, 60, 94, 254-256, 305-386, 727-728 



remains in marine deposits, 145 

 Plateaus, fauna of continental, 491-516 

 Platyhelminthes, 577 

 Plectognathi, 411, 611, 615 

 Pleuronectidfe, 390, 407-408, 646 

 " Podbielski," The, 299 

 Podoceridce, 468 

 "Pola,"The, 15 

 Polar currents, no, 117, 118, 124, 244, 



245, 276, 300, 458, 531, 533, 534 

 Pollack, 441, 442, 443, 451, 452, 731 

 " Polls" {see Oyster "polls ") 

 PolypodidK, 597 

 " Pommerania," The, 495 

 Pools {see Oyster "polls") 

 " Porcupine," The, 11, 12, 546 

 " Portuguese man-of-war," 68, 89, 92, 574 

 Potassium, 189-190 



Potential temperature {sec Temperature) 

 " Pourquoi Pas?" The, 18 

 Pourtales Bank, 178 

 Prawn larvae, 622, 623 

 Prawns, 420, 469, 482, 486, 517, 530, 531, 



534, 558, 583, 584, 585, 586, 587, 618, 



622, 624, 633, 641, 663, 664, 665, 671, 



699, 720, 775 

 red, 81, 86, 94, loi, 102, 104, 118 

 Pressure in the sea, 24, 219, 224, 245-247 

 " Princesse Alice," The, 14, 387 

 Pristipomatidge, 390, 403 

 Propagation of marine animals, 729-755 

 Protozoa, 563 

 Pteropoda, 72, 87, 107, 118, 163, 164, 167, 



172, 201, 419, 578, 587-590, 625, 631, 



640, 642, 645, 658, 669, 702, 7 1 8, 720 



