Plate 117. 

 tongatAbu. 



1. Blow lioles on the outer edge of the reef Hat platform at Hoiinia Toloa. south poin. 



of the island (Cook's Point). 



2. Undercut cliffs of elevated coralliferous limestone with lines of caverns and stalactites, 



on the Liku, or windward face of the island. 



1, 2, Martin, Phot. 



