SUBJECT INDEX 



955 



zone, geosynclinic, 783 



— grey mud, 665 



— hard ground, 667 



— hydrogen sulphide, 398 



— impoverishment, 558, 559 



— intertidal, 108, 116 



— littoral, 66, 114, 116, 204, 266, 713 



— marine, 345, 349 



— meeting of saline and fresh waters. 



597 



— mesohalines, 345 



— mixed waters, 354, 676, 698, 704 



— nitrite, 614 



— off-shore, 325, 430 



— oxydation, 390-8, 559 



— oxydation-reduction, 390, 559 



— photosynthesis, 559 



— plankton, 597, 598 



— pre-polar, 70 



— pseudo-abyssal, 123, 211 



— red calanus, 102 



— reduction, 229, 390, 400, 559, 560 



— sand, 665 



— seawards, of delta 561 



— shallow-water, 63, 253 



— shelf, 818 



— shell-gravel, 666 



— stenohaline, 377 



— sub-littoral, 816 



— sub-tropical, 705 



— surface, 721 



— transition, 705 



— tropical, 676 



— ultra-abyssal, 713-15, 721 



— vegetation, 665 

 zoobenthophages, 669 



zoobenthos, 196, 259, 431, 449, 452, 463, 

 612, 646, 661, 772, 773, 810, 835-8 



zooplankton, 43, 50, 93, 96, 100, 232, 238, 

 243, 264, 303, 402, 646, 647, 706, 729, 

 758, 759, 761-3 



— chemical composition of, 100, 101 

 zostera, 61, 196, 198, 208, 214, 219, 429, 



436, 441, 445, 660, 663, 667, 771 



— fields, 441,660, 663, 667 

 Zuyder Zee, 435 



