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APPENDIX. 
Australian Barrier-Reef. — This great reef, which has 
already been described, has been coloured from the charts 
of Flinders and King. Jukes has given many details re- 
specting it in the Voyage of H.M.S. Fly (vol. i. 1847, chap, 
xiii.). In the northern parts, an atoll-formed reef, lying 
outside the barrier, has been described by Bligh, and is 
coloured dark blue. In the space between Australia and 
New Caledonia, called by Flinders the Corallian Sea, there 
are numerous reefs. Of these, some are represented in 
Krusenstern’s Atlas as having an atoll-like structure ; 1 
namely, Bampton Shoal, Frederic, Vine or Horse-slioe, 
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 out- 
side them profoundly deep. Nearly all that is known of 
this group is derived from the labours of Dentrecasteaux 
and Bougainville : the latter has represented one continuous 
reef 90 miles long, parallel to the shore, and in places as 
much as 10 miles from it ; coloured pale blue. A little 
distance northward we have the Laughlan Islands, the 
reefs round which are engraved in the atlas of the Voyage 
of the Astrolabe, in the same manner as round the encircled 
islands of the Caroline Archipelago : 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 Wells Reef, described 
in G. Hamilton’s Voyage in H.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 
[There are many atolls in this sea. — Capt. Wharton.] 
