Plate 160 b. 



(PLEASANT ISLAND) NAURU. 



1. Lagoon, flanked with pitted and honeycombed pinnacles of elevated coralliferous lime- 



stone, near the northeast extremity of the island. 



2. Sink and surrounding vegetation near Ohlson's station. 



1, 2 from Photographs by Mr. .John Arundel. 



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