Amateur marine naturalists who like to observe and collect flora and fauna between the tide-marks of shores will find this an extremely useful guidebook. Other interested, laymen, both young and older, will find it a simple and concise but scholarly-condensed volume on all aspects of oceanography. This takes up the watery 70% of the earth's surface in all its aspects -- the depth-hidden bottoms fascinating in their various formations -- the strange stratification of various waters flowing from different sources -- the restless, tide-tossed surface. There are chapters on historical explorations and researches, the major and minor inhabitants from the whale to the plankton, coral reefs, fishing and the dangers of over-fishing. Coastal schools and classes will find it an aid in preparation for collecting and observing expeditions.