56 



BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



Oneata. 



Plates 31, 33^, Figs. 10-13. 



Oneata Island is a low ridge of elevated limestone, rising to a height 

 of IGO feet, connected at its eastern extremity by a coral reef with the 

 islet of Loa, of similar structure to Oneata, and rising to a height of 

 140 feet. Towards the eastern extremity of Oneata, on the northern 

 side, the island is indented by deep bays, studded with mushroom- 

 shaped islets and large heads barely cropping to the surface. The spit 



ONEATA. 



protecting the bay from the east rises vertically, is deeply pitted, full of 

 potholes, and honeycombed and perforated by a large opening similar 

 to the Hole in the Wall at Abaco in the Bahamas. Everywhere on the 

 surface of the island we found 

 the elevated limestone cropping 

 out. The southern face of the 

 island is also indented with 

 bays, the beginning of shallow 

 sounds which are now cutting 

 Oneata into smaller islands by 

 undermining the shore line and 

 forming low vertical cliffs, prob- 

 ably by the same processes which 

 disintegrated the area formerly 



occupied by the elevated limestones, and of which Oneata and Loa are 

 the remnants. 



Oneata lies about a mile from the inner edge of the outer reef flat, 



ISLET OFF ONEATA SHOKE. 



