— 9?. 



'/Aurora Islancl," (ouc of tlic DPviigerous Ardn'pelago) lias 

 been upheaved at two successivc pcriods, the last, long subde- 

 quent to the first, altogethcr tivo hiiiidred aiid fifij feet. 



//Margarets Isle," in the S. W. side of the same Ardn'pelago, 

 lias been upheaved endwajs and bodily, so that ifs lagoon is 

 now left dry. 



// Walkonskj's Isle," lying in the midst of this Archipelago 

 has had one end liffced high above the Vv^ater, whilst the ether is 

 still a water washed reef, but the entrance to the lagoon is left 

 dry. Here we have to remark en passant, that Bow Island, one 

 of the points (T appui adopted by Mr. Dakwin for the support 

 of his theory , lies S. W. Y^ W. at not more than one hundred 

 and fifty railes distance from Walkonsky's and S. W. about two 

 hundred from Margarefs Isle, and besides these are several 

 other lagoon islands , which have been elevated within Mr. Dak- 

 win's area of subsidence; amongst those, we may mention here: 



//Penrhyns Isle," lat. 9° 1' S. long. 157° 51/ W. has been 

 elevated about fifty feet above the sea, yet ij^'s lagoon is still 

 of large dimensions, studded with coral patches and the entrance 

 aifording a boat passage, in and out of it. 



//Enderbys Me." Lat. 3° 8' S. long. 171° 8' W. has been 

 rccently elevated eighteen feet above ihe Icvel of it's previous 

 height, and has had it's central lagoon dried up. 

 ■ //Mc. Keans Isle." Lat. 3° 35' S. Long. 174° 17' W. has 

 been reeen tly elevated twenty five feet above the level of high v\'ater. 

 - Turn we now to the following observations , by captain Yv'ii.- 

 KEs of L. S. A. exploring expedition. 



/f]\Iy opportunities for observation of the coral forraations 

 //have been numerous, and I have had evcry faciiity for viewing 

 //to advantage, not only those that exclusively belong to it, 

 // but also the reefs which surround the high volcaiiic isknds 

 //and which aflbrd the most safe and convenient harbours of 

 //the Pacific. The rcoult in my miud is, iliat the theory of 

 // Darwin , which holds that an equal amouut of subsidence of 

 //the land and oï' upward growth of coral is taking place, is 

 // alike at variance with the configuration , extent , and general 



