STRUCTURE OF CORAL ISLANDS. 199 
elevated three or four feet, mdicating an elevation of the 
island. . Lagoon shallow, with some growing coral, but none 
near the shore. Some corals growing on the platform, near 
its margin, mostly small Madrepores, Astraas, Nullipores. 
Fragments of pumice were found among the natives, which 
had floated to the island (see fig. 5, page 168). 
Washington Island. — Lat. 4° 41’ N. Long. 160° 15’ W. 
3 miles by 14, trending east and west. It is a dense cocoanut 
grove with luxuriant shrubbery. No lagoon. The shore plat- 
form is rather narrow. <A point of submerged reef, one and a 
half miles long, stretches out from the southwest end. Did 
not land on account of bad weather. 
Otuhu, Paumotu Archipelago. — 14° 5’ 8S. 141° 30’ W. 
1i miles by 2, trending north and south. No lagoon. 
Wooded. 
Margaret, Paumotu Archipelago. — 20° 42'S. 143° 4’ W. 
Diameter one mile, nearly circular. A small shallow lagoon 
with no entrance. Northeast side alone wooded, and in two 
patches. | 
Teku or Four Crowns, Paumotu Archipelago. — 20° 28'S. 
143° 18’ W. Diameter 14 miles, nearly circular. <A small 
lagoon with no entrance. Southwestern reef bare; five 
patches of forest on the other part. 
Honden or Henuake, Paumotu Archipelago. — Size 3! 
miles by 2 miles. Oblong, five-sided; trending west-north- 
west. A small, shallow lagoon, communicating with the sea 
only at high tide, on the west side. There are two other 
entrances which are seldom if ever covered with water, and 
appeared merely as dry beds of coral rock. Height of the 
island twelve feet ; lowest on the south side. Belt of verdure 
complete, and consisting of large forest trees, with the Pan- 
danus and other species, but no cocoanuts; its breadth half a 
