PACIFIC OCEAN. 217 



a mile from the reefs lie found only seven fathoms. As I have 

 no reason for supposing there is deep water within these reefs, 

 I have coloured them red. — Kennedy Island, N.E. of Duff's : 

 I have been unable to find any account of it. 



New Caledonia. — The great barrier-reefs on the shores of 

 this island have already been described (Fig. 5, Plate II.). 

 They have been visited by Labillardiere, Cook, and the 

 northern point by D'Urville ; this latter part so closely resem- 

 bles an atoll that I have coloured it dark blue. The Loyalty 

 group is situated to the east of New Caledonia ; some at least 

 of the islands are formed of upraised coral-rock, and are 

 fringed with living reefs ; see Rev. W. B. Clarke, in Journal 

 of Geolog. Soc. 1847, p. 61 ; coloured red. North of this 

 group there are some extensive low reefs (called Astrolabe 

 and Beaupre'), which do not seem to be atoll-formed: these 

 are left uncoloured. 



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 respecting 

 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 ; 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 pro- 

 foundly deep. Nearly all that is known of this group is de- 

 rived from the labours of Dentrecasteaux and Bougainville : 



