56 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
Oneata. 
Plates 21, 22%, Figs. 10-12. 
Oneata Island is a low ridge of elevated limestone, rising to a height 
of 160 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 ISLET OFF ONEATA SHORE. 
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, 
