8i6 



DEPTHS OF THE OCEAN 



Monaco Deep, 196 



Monaco, oceanographical museum at, 14 

 pelagic trawl, 36 



Monascidians, 525 



Monkfish, 79, 441. 442, 443, 448, 451, 452 



Moonfish, 119 



" Moraine profonde," 205 



Morocco fishery, 69 



Moseley Deep. 142, 196 



Mud-eaters, 717 



"Mud-line," 133, 134, 426-427, 648, 717 



Muds, deep-sea, 185-188 



Mullet, 71, 444, 448 



Mullidse, 390 



Mursenidse, 79, 389, 395, 605 



Murray Deep, 140 



Mussels, 418, 419, 420, 462, 467, 468, 472, 

 473, 474, 475, 477, 479> 480, 482, 483, 

 486, 488, 490, 495, 501, 502, 508, 513, 

 514, 530, 534, 535, 547, 553,559,575,71? 



"Mutine," The, 19 



Myliobatidre, 393 



Myopsidae, 590, 592, 595, 597, 625 



Myriothelidse, 522 



" Myrmidon," The, 19 



Mysids, 720 



Nannoplankton, 356 



Nansen's closing net, 35, 359 



Nansen thermometer, 233 



Naples Zoological Station, 20 



Narcomedusa;, 568, 571 



Nares Deep, 132, 141, 195, 196 



Narratives of " Michael Sars " cruises, 52-128 



Naticidas, 475 



" National," The {see " Plankton " Expedition) 



Nauplii, 654-655 



"Navarino," The, 707 



Needle-fish, 103, 120 



Negretti and Zambra thermometer, 4.217 



Nekton, 309 



Nemertines, 86, 577, 57S, 624 



NemichthyidK, 605, 612 



" Neritic," 562 



Neritic algx, 344-346 



diatoms, 354 



peridinea;, 344 



plankton alga;, 340-346 

 "Nero," The, 16, 131, 143 

 Ness, Loch, temperature oscillations in, 16 

 Nets attached to current-meter, 359 



Chun's, 35, 36 



closing, 58, 59, 61, loi, 102 



drift, 45 



Hensen's, 37, 45, 35^, 359 



"Michael Sars," 46, 47, 48, 49, loi, 102 



Nansen's, 35, 359 



Petersen's, 359 

 Newfoundland Bank, 106, 107, 109, no, 

 111-114. 115, 116, 117. 213, 244, 245, 

 297-300. 357 



" Newington," The, 20 



Night - hauls by "Michael Sars," 92, 93, 



94, 95 

 " Nimrod," The, 18 

 Nitrates, 368, 369, 370, 372 

 Nitrites, 368, 369, 370, 372 

 Nitrogen in sea-water, 253, 258-259, 368- 



370, 377, 380, 728 

 Nodules, manganese (see Manganese nodules) 



phosphatic (see Phosphatic nodules) 

 " Norge," The, 124 

 "Norseman," The, 19 

 North Atlantic (see Atlantic, North) 

 North Sea, current observations in, 268, 269 

 fauna of, 491-503 

 phosphorus in water of, 185 

 silica in water of, 184 

 Norwegian Depression, 503-507 



Expeditions, 10, 12, 15, 309. 504, 505. 



517, 523 

 fisheries, 37, 55, 56 

 fjords (see Fjords) 

 Norwegian Sea, 12, 55, 122, 124, 125, 167, 

 196-198, 220, 222, 223, 239, 240, 243, 

 261, 274, 275, 276, 277, 278, 280, 281, 

 282, 283, 284, 302, 303, 304,457, 516-535 

 fauna of, 92, 107, 108, 118, 120, 126, 127, 

 434-437,517-525,546-551,637-641,647 

 Notidanidte, 390, 396 

 Nudibranchs, 468, 494 

 Nutrition of marine animals, 716-728 



Ocean, area of the, 132 

 " Oceanic," 562 



plankton alga;, 346-349 

 Oceanographical Institute at Paris, 14 



Museum at Monaco, 14 

 Oceanography, physical, 210-306 

 Octopoda, 590, 595, 597, 625, 678, 706 

 CEgopsida;, 590, 595-596, 625 

 Ommatostrephida;, 591, 592, 596 

 Onychoteuthida;, 591, 596, 632 

 OphelidK, 475 

 Ophidiid, 88 

 Ophiuridoe, 121, 418, 419, 420, 429, 430, 



436, 538, 547, 576 

 Orbulina ooze, 164 



Organic matter in marine deposits, 42S, 430- 

 431, 716, 717-719 



remains in marine deposits, 145 



substances in the sea, 358-370, 381, 385, 



_ 386, 717, 728 

 Origin of the present-day fauna of the Nor- 

 wegian Sea, 548-551 

 Osmotic pressure in the cells of animals, 690- 



691 

 Ostracoda, 89, loi, 149, 579, 581-5S2, 624, 



631, 640, 655 

 Otoliths of fishes in marine deposits, 149, 151 



of the plaice, 759 

 Otter board, 42 



