152 Fish Stories 



very high, often twenty-five feet or more, the high tide ex- 

 tending far up the estuaries, which at low tide may be occu- 

 pied by fresh water. The Naha Stream at Loring flows 

 through a series of lakes, the lowermost of which (Roose- 

 velt Lagoon) lies close to the estuary of the stream, the 

 water flowing from the lake over a considerable waterfall 

 at low water. At high tide this cascade is reversed, the salt 

 water passes by an overfall into the lake, which is thus con- 

 verted into a brackish lagoon. It is a well-separated lake at 

 low water, part of the sea at high water. 



