L

1. Laboratories on board ship, 339, 340

2. Labrador Current, 665

   1. meeting Gulf Stream, 682

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3. Labrador Sea:

   1. currents, 665, 666

   2. water masses, 663–665

4. Laminar boundary layer, 479

5. Laminar flow, 89, 470

6. Laminarian zone, 277

7. Laminations in sediments:

   1. deep sea, 1038, 1039

   2. shallow water, 1039–1040

8. Larvae (see Zooplankton, temporary)

9. Lateral mixing (see Eddy viscosity and Turbulence)

10. Law of parallel solenoids, 455

11. Layer of no motion, determination of, 456, 457

12. Level, reference, for depths, 10

13. Level surfaces, 390, 402

14. Liebig's law of the minimum, 768, 792

15. Life cycles of animals (see also Reproduction), 283, 319–322

    1. field studies of, 322–323, 845–848, 862–865

16. Life in the sea, development of, 281–284

17. Light:

    1. related to animal ecology, 824–839, 851, 899

    2. related plant production, 774–776, 781–782

18. Limacina, biological studies of, 384

19. Limnoria, 310

    1. food of, 896

    2. reproduction, 317

20. Lithium, 182

21. Littoral system, 276–277

    1. animals of, 800–805

       1. horizontal distribution, 803–805

    2. plants of, 286–295, 302

    3. subdivisions, 275, 276, 286

22. Local change, 157

23. Local sequence, 384

24. Luminescence (see Bioluminescence)

25. Lunar hours, 548