XX DESCRIPTION OF PLATES. 



Fig. 5. — New Caledonia, in the western part of the Pacific; from 

 Krusenstern's atlas, compiled from several surveys ; I have slightly 

 altered the northern point of the reef, in accordance with the atlas 

 of the Voyage of the Astrolabe. In Krusenstern's atlas, the reef is 

 represented by a single line with crosses ; I have for the sake of 

 uniformity added an interior line ; scale ^ of an inch to a mile. 



Fig. 6.— Maldiva Archipelago, in the Indian Ocean ; from the survey 

 by Capt. Moresby and Lieut. Powell ; scale ~ of an inch to a mile. 



PLATE III. at beginning of Volume. 



The principles on which this map is coloured are explained in the 

 beginning of Chapter VI. ; and the authorities for colouring each 

 particular spot are detailed in the Appendix. The names printed 

 in italics in the Index refer to the Appendix. 





