208 APPENDIX. 



its shores; left uncoloured. — Tinakoro is a constantly 

 active volcano without reefs. — Mendana Isles (mentioned 

 by Dillon under the name of Mammee, etc.) ; said by 

 Krusenstern to be low, and intertwined with reefs. I do 

 not believe they include a lagoon ; I have left them un- 

 coloured. — Duff's Islds. compose a small group directed in 

 a N.W. and S.E. band; they are described by Wilson 

 (p. 296, Miss. Voy.y 4to edit.), as formed by bold-peaked 

 land, with the islands surrounded by coral-reefs, extending 

 about half a mile from the shore ; at a distance of a mile 

 from the reefs he found only seven fathoms. As I have no 

 reason for supposing there is deep water within these reefs, 

 I have coloured them red. Kennedy Isld., 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. 3, Plate 

 III.). They have been visited by Labillardiere, Cook, and 

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

 resembles an atoll that I have coloured it dark blue. The 

 Loyalty group is situated eastward of this island; from 

 the chart and description given in the voyage of the 

 Astrolabe^ they do not appear to have any reefs; 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. — The limits of this great 

 reef, which has already been described, have been coloured 

 from the charts of Flinders and King. 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 



