MUSEUM OF COMPARATIVE ZOOLOGY. 169 



EXPLANATION OF THE PLATES. 



PLATE I. 



The Hawaiian Islands. From British Admiralty Chart. Soundings in fathoms 

 The shaded shore plateaus show the position of coral reefs. 



PLATE II. 



Oahu. From Hawaiian Government Survey, W. D. Alexander, Surveyor-General. 

 The shaded shore plateau indicates the recent and ancient coral reefs. 



PLATE III. 



Maui. From Hawaiian Government Survey, W. D. Alexander, Surveyor-General. 

 The shaded shore plateau indicates the position of coral reefs. 



PLATE IV. 



The south side of Oahu. The shaded portions indicate the position of the ac- 

 tive reefs, extending along the south side of Oahu from Barber's Point towards 

 Makapuu Point, and in Kaneohe Bay. From British Admiralty Chart. 



PLATE V. 



Kaneohe Bay. From Hawaiian Government Survey, W D. Alexander, Surveyor- 

 General. The lined and colored parts indicate the extent of the active reefs of 

 Kaneohe Bay. Soundings in fathoms at low-water mark. 



PLATE VI. 



Honolulu and its Fringing Reef. The line of breakers indicates the position of 

 the outer slope of the reef. From a photograph. 



PLATE VII. 



The eastern side of the entrance of Honolulu harbor. From a photograph. 

 Diamond Head in the distance. 





