124 NOTES EXPLANATOKY OF LETTERING ON THE GEOLOGICAL MAPS. 



N. Big boss of Porites in situ on the Hurricane Bank 6 feet above high water, 10 feet by 5 feet by 3 feet 

 above the pebbles and rubble of the Hurricane Bank which surrounds it. 



0. Corals observed embedded in and covered by the breccia in situ and almost as perfect, conspicuous 

 among them being a large species of Montipom. 



P. Small cliff 10 feet out from high-water line; submerged at high water. 



Q. The beach along here for a long way maintains the same general character. 



R. Block of breccia, 10 feet by G feet, 4 feet above high water. 



S. Big worn block of Porites well up above breccia cap. 



T. Only a few projecting piers of the breccia cap along here. 



U. There is a considerable depression for a long distance on the reef platform between the O.L.IO and 

 the O.2.B., in which the water, when the tide is out, is from 6 to 18 inches deep, while the O.L.IO acts 

 as an embankment 1 foot to 1 foot 6 inches above it, within which the water on a calm day is uninfluenced 

 by the ocean swell and its surface is without more than a most gentle ripple. 



V. Sandstone resting on eroded breccia. 



W. Sandstone and fine conglomerate occur near the high-water line. 



X. Remnant of sandstone in a few places along here resting on worn breccia. 



Z. Bosses of dead Porites occur at various distances out on the reef platform apparently in sitU', none, 

 however, attaining the height of high water. 



TENGAKO (Plate 11). 



A''. Old heathen shrine, the outer M'alls of which are built of flattish stones, specially long stones being 

 used for the corners, the whole interior space between which is filled up to the top with other and more 

 irregular stones. This is the largest and was at one time the most important shrine on this atoll. 



B'. Fan-shaped deposit of coarse coral rulible torn from the breccia and driven with the Hurricane Bank 

 and recent debris on to the lagoon platform and over the edge of it into the lagoon itself. 



C^. Breach across island here through which, during high water and very rough weather, the sea is 

 driven. 



D^ Several small bosses of Porites extending well out on the reef platform ; there are also a few small 

 loose pieces of rock. 



E^ Porites in situ 50 yards out on reef platform. 



F^ Breccia 1 foot above high water. 



G^. Porites block in situ on lagoon platform. 



H^. A strip of sandstone 150 feet along here is being eroded. 



J^ Small patch of sandstone which is being eroded together with the breccia cap on which it rests. 



K^ Several small blocks of breccia cast up on beach, up to 2 feet in length. 



L^. Newer conglomerate here, fine and coarser being eroded with the breccia cap forming the general 

 boundary of the beach. 



M'. Patches of sand alternating with patches of smooth-worn breccia. 



N^. Short projections oi- headlands of breccia along here, the beaches between which are composed of 

 foraminiferal sand and genei'al beach ddbris. 



0^ High mass of breccia here, apparently in ^itn. 



Pi. Thin bedded sandstones enclosing subangular and loiuided stones up to 3 inches here and there, with 

 an occasional much larger stone, all overlying the worn breccia and with it undergoing erosion. 



Qi. Coarse worn blocks make up this Hurricane Bank. 



R'. Breccia blocks with some new pieces of coral make up the beach about here. 



