APPENDIX. 209 



having an atoll-like structure; namely, Bampton shoal, 

 Frederic^ Vine or Horse-shoe, and Alert reefs; these have 

 been coloured dark blue. 



Louisiade ; the dangerous reefs which front and surround 

 the western, southern, and northern coasts of this so-called 

 peninsula and archipelago, seem evidently to belong to the 

 barrier class. The land is lofty, with a low fringe on the 

 coast; the reefs are distant, and the sea outside them 

 profoundly deep. Nearly all that is known of this group 

 is derived from the labours of D'Entrecasteaux and Bou- 

 gainville : the latter has represented one continuous reef 

 ninety miles long, parallel to the shore, and in places as 

 much as ten miles from it; coloured pale blue. A little 

 distance northward we have the Laughlan Islds., the reefs 

 round which are engraved in the atlas of the voyage of the 

 Astrolabe^ in the same manner as in the encircled islands 

 of the Caroline Arch., the reef is, in parts, a mile and a 

 half from the shore, to which it does not appear to be 

 attached ; coloured blue. At some little distance from the 

 extremity of the Louisiade lies the Wells reef, described 

 in G. Hamilton's Voyage in If. M.S. Pandora (p. 100): it 

 is said, "We found we had got embayed in a double reef, 

 which will soon be an island." As this statement is only 

 intelligible on the supposition of the reef being crescent or 

 horse-shoe formed, like so many other submerged annular 

 reefs, I have ventured to colour it blue. 



Salomon Archipelago : the chart in Krusenstern's 

 atlas shows that these islands are not encircled, and as 

 coral appears from the works of Surville, Bougainville, and 

 Labillardiere, to grow on their shores, this circumstance, 

 as in the case of the New Hebrides, is a presumption 

 that they are fringed. I cannot find out anything from 

 D'Entrecasteaux's Voyage^ regarding the southern islds. of 



879 



