134 "ALBATROSS" TROPICAL PACIFIC EXPEDITION. 



have seen in the Paumotus. One can take in at a glance the varying con- 

 ditions which exist in such an atoll, and the different processes which go to 

 make up a typical atoll. Anu-Anurunga resembles Nukutipipi, only it is 

 somewhat larger, and from that we pass to Anu-Anuraro and Hereheretue, 

 which represent each on a larger scale conditions which take their greatest 

 development in such huge atolls as those of Hao, Fakarava, and Rangiroa. 

 On the larger islands it is somewhat difficult to trace the changes which 

 have taken place ; but on such atolls as Nukutipipi, which we could take in 

 as a whole, we readily recognized structural features which were somewhat 

 vague from their extensive development in the larger atolls, or from their 

 modification by special conditions. 



Having formed our general conception of the group before reaching the 

 more or less isolated atolls of the eastern Paumotus, we could recognize at 

 once in these smaller atolls the distinctive features of the group, well con- 

 centrated and sharply developed from being seen on a small scale. 



