8io 



DEPTHS OF THE OCEAN 



Arcturids, 5 1 1 



Areas of the ocean-floor at different depths, 



412 

 Argus Bank, 178 



Ascidians, 62, 103, 419, 469, 472, 479, 483, 

 486, 497, 49S, 504, 517, 51S, 529, 530, 

 534, 597, 598 

 Astartidce, 475 

 Asterids, 109, 468, 490 

 Atherinid?e, 397 



Atlantic Ocean, area draining into, 194 

 area of, 134. 



area of, at different depths, 134, 136 

 continental shelf and slope in, 134 

 deepest sounding in, 132 

 deeps of, 140- 143 



depths of, 131, 132, 134-136, 140-142 

 number of soundings in, 131 

 shore-slopes of, 135 

 submarine banks of, 135 

 North, abyssal area of, 196 

 area of, 195 



anticyclonic area of, 194 

 archibenthal fauna of, 538, 546 

 continental shelf in, 195 

 continental slope in, 195-196 

 deeps of, 196 



deep-water fauna of, 536-548 

 deposits of, 9, 194, 198-209 

 depths of, 56, 194, 195 

 hydrographical conditions of, 295-300, 



458-459 

 temperature of, 194, 221, 222, 224, 227, 

 228, 295, 305 

 Atlantic ridge, 118, 120, 135 

 Attraction of land-masses, effect of, 130 

 Auks, 124, 712 

 Aulacanthida;, 565 

 Austrian expeditions, 15 

 Auxospore development, 314, 314-319, 343, 



344 

 Azores current, eastern, 635 



Bacteria, 182, 188, 259, 369, 370, 674, 72S 



denitrifying, 259, 369, 370 



nitrifying, 259, 369, 370 



sulphur-reducing, 182, 188 

 Bailey Deep, 142 

 Baillie sounding machine, 25, 26 

 Balanids, 474, 582 

 Balistida}, 615 

 Baltic Sea, phosphorus in water of, 185 



silica in water of, 184 

 " Banks," 421 

 " Banquereau," 1 12 

 Barium nodules, 157 



sulphate, 157, 190 

 Barnacle belt, 461-462 



Barnacles, 100, 200, 207, 477, 508, 525, 556, 

 634, 642, 667, 668, 669, 670, 672, 683 

 Bartlett Deep, 196 



Bathometers, 2 



Bathymetrical contours first shown on maps, 3 



range of deep-sea fishes, 423 

 Bathypelagic animals, 562, 563, 624-628 

 Bathyteuthidre, 596 

 Batoidei, 388, 392-393 

 Belgian Expeditions, 16 

 " Belgica," The, 16, 575, 639 

 Belknap Deep, 142 

 Belt of Venus, 89 

 Benthos of the Faroe Channel, 127 

 Berycidse, 401-402, 614 

 " Besugo," 74 



Biloculina clay, 164, 523, 527 

 Biological laboratories, marine, 20 

 Biology, general, 660-785 

 Bipolarity of oceanic diatoms, 352-353 

 Birds following shoals of capelan, 712 



on Rockall, 124 

 Black Sea, 15, 178, 1S2, 257 

 Bladder type of suspension organs, 315, 



329 

 "Blake," The, 12, 27, 30, 31, 387, 592 

 Blennies, 756, 757, 758 

 BlenniidjE, 390 

 Blind fishes, 104, 6S1, 682, 685, 686, 687 



squid, 682 

 Blue mud, 160, 161, 162, 167, 168, 171, 

 175, 181, 182, 187, 188, 19S, 199, 200, 

 201, 426, 431, 717 

 Bog manganese ore (see Manganese nodules) 

 Bolitsenidae, 597 



Bomb-lances taken in blue whales, 714 

 Bonito, 609, 635, 636, 755 

 Boreal pelagic life, 107, 108, 118, 120, 126 



region of the Norwegian Sea, 457, 459-516 

 Boreo-arctic region of the Norwegian Sea, 



458, 531-535 

 " Bottle-nose grounds," 592 

 "Bottom-water" in Mediterranean, 68 



in North Atlantic, 115, 117, 220 



in Norwegian Sea, 125 

 Boulder clay, 205, 208 

 Boundary-waves, 274, 715 

 Brachiopoda, 160, 418, 419, 480, 483, 484, 



485, 490, 507, 510, 529, 541 

 Brachyura, 544 

 Bramiidce, 643 



Branching type of suspension organs, 316 

 Bream, 64, 441, 442, 443, 449 

 Brill, 441, 442, 451, 453, 646 

 " Britannia," The, 19 

 British Antarctic Expeditions, 5, 17, 18 



Association Dredging Committee, 6 



cable ships, 19 



surveying ships, 19 

 Brittle-stars, 472, 473, 482, 486, 491, 492, 



508, 518, 530, 540 

 Bronzite spherules, 154, 158 

 Brooke Deep, 142 

 Brooke's sounding apparatus, 8, 9, 130 



