Nos. 620-621] THE HAW All AX CORAL REEFS 



413 



1. Outer reefs, or reefs formed from the growth of 

 corals exposed to the open seas. Of this character are all 

 proper barrier reefs, and such fringmg reefs as are un- 

 protected by a barrier. All of the larger Hawaiian reefs 

 are of this character. 



2. Inner reefs, or reefs formed in quiet waters between 

 a barrier and the shores of an island. The reefs of this 

 type are very rare in Hawaii ; usually they are mere hum- 

 mocks in the lagoon of the fringing reef. 



Kaneohe Bay and Pearl Harbor, on Calm, are essentially 

 large drowned valley regions, converted by subsidence 

 into land-locked bays, which have become more or less 

 completely barred and filled by coral growths. Were 

 there not such large quantities of fresh, mud-laden water 

 poured into these bays, they would be veritable coral 

 wonderlands, for it is in protected waters of inner chan- 

 nels or lagoons that corals attain their finest develop- 

 ment, and the "richest views are presented to the ex- 

 plorer of coral scenery." 



The marine flora and fauna in these bays presents 



