Z

1. Zoogeography:

   1. barriers:

      1. East Pacific, 803

      2. land, 803

      3. Wyville Thompson Ridge, 810, 849

   2. faunal areas, 273, 799–810

2. Zooplankton (see also Plankton), 812–823

   1. adaptations, 821–823

   2. collection and analysis, 378–382

   3. neritic and oceanic, 820–821

   4. permanent, 816–819

   5. production, 934–936

   6. relation to physical-chemical environment, 823

   7. relation to phytoplankton, 898–904

   8. temporary, 814–815

3. Zostera (see Eel grass)