NOTES EXPLANATORY OF XETTEEINCt ON THE C4E0L0GICAL I^FAPS. 113 



G. Pontes in situ, very much bored hy various old marine organisms in some ):)locks, now about liigh- 

 water level. 



H. Large bosses of Pontes in situ, nearly close together all along here, showing reverse cone-like 

 structures in side fractures. 



TUTANGA (Plate 4). 



A. Sand and debris filling in between the Pontes tops and forming a beach, which at its highest point 

 is above them. 



B. Fragmental and small rubble beach from these two points. 



C. Small bank of fragmental and rubble as on outer beach, forming an almost complete loop. 



D. Shallow boat passage out here. 



E. Small boat channel through which the e))b tide at the time of survey was running 2i miles per 

 hoiu'. 



F. Numerous large bosses of Pontes all about hei-e, most of which can be recognised as being in situ, 

 and standing from 1 to 4 feet aboA"e high water. 



G. This area is largely occupied by bosses of Pontes 2 to 3 feet al^OA^e high water, and blocks of 

 breccia, the latter both fixed and broken ; all undergoing solution and covered with mosses, while l^elow 

 and between them are holes, pits, and caverns, in the deepest of which water is found at high tide, and 

 among which thrive dense masses of ferns and scrubs ; while towering over all, and higher than on any 

 other island on this corner of the atoll, are the tall cocoanut trees. 



TENGASU (Plate 4). 



A. Abimdant bosses of Pontes in situ as at Tutaga. 



B. Pontes appearing through the sand of the island. 



C. Bosses of Pontes appearing through the breccia. 



D. Breach through here at high tide during rough weather and westerly winds. 



TEAFOAFOU (Plate 5). 



A. Very little storm beach here. The solid breccia is but thinly covered in places l:iy rubble. 



B. Occasional scanty rubble and shingle beach here. 



C. No beach here. 



D. Slight beach of rubble and shingle. 



E. Ngie bushes along here. 



F. Channel at half tide ; tailing out both ways and very narrow between the two sandbanks. 



G. Small shifted pieces of breccia mingled with a little foraminiferal sand form the beach on this side 

 of the channel. 



H. The surface of this end of the island is almost flat, in places freely bestrewn with pumice, which in 

 some parts where the soil has been partially removed almost covers small areas. 



J. The masses of Pontes are much less abundant here. 



K. Sandbank newly thrown up on old platform and enclosing a portion of the platform. 



L. A gently-rising platform of breccia and coral bosses. 



M. Ngie trees chiefly, all round this sea side of island and along the beaches ; only a comparatively 

 few good cocoanut trees. Apparently the sea sometimes sweeps over a large part of this island, so that 

 there is rarely more than a sign of beach. 



