EEPORT ON MATERIALS FROM THE BORINCtS AT FUNAFUTI ATOLL. 213 



he ;i finely detrital mud cemented by calcite; in this there are entire and fragmentary foraminifera 

 helonii,'ing to (}loliiijc'fiii'i (rare), I'olifireina mindacciiin, and Amphistegina. Ilaliiiwdu, not in good preservation. 



Depth from Surface, 210-220 feet ; Distance Bored, 10 feet; Total Length of Core 

 Obtained, 9 inches; Numbers of Cores, 179-185. 



The solid cores for the most part are nodular lumps, rounded by the drill, of hard 

 cream-coloured porous limestone, similar to the preceding. There are pieces of 

 Pocillopora, Orhicella and of another astrsean coral, either in the condition of casts 

 or with the coral walls partly remaining, but the original fibrous structure is 

 obliterated or replaced by calcite. The interspaces of the corallites are usually infilled 

 with calcite. The larger part of the cores appears to be of fragmentary materials in a 

 fine sediment now cemented by calcite into a fairly hard rock. Foraminifera are 

 plentiful, more particularly Polytrema planum and Amphistegina Lessonii, echinid 

 spines, Serpula, fragments of Lithothamnion . A sample of the loose detritus from the 

 boring consists of finely broken-up angular chips of a whitish rock similar to that in 

 the solid pieces of core ; under the microscope it is seen to be principally of foraminifera. 



Details. 



(179). Length 75 millims. Core cylindrical, of porous grey rock. Only echinid spines visible under 

 a lens. 



(180) [646]. Length 35 millims. A rounded nodular piece of hard whitish rock, part of it an Astrsean 

 coral, the walls and septa remaining in some places, in others removed, leaving only casts. Foraminifera 

 in the detrital material surrounding the coral, include Globigerina, Carpenteria, Pohjtrema miniaceum, 

 P. planum, Gypsina, Amphistegina, very abundant, and Heterostegina. Echinid spines, Serpula, pieces of 

 crustacean test, and Lit/iothamnion . 



(181) [617]. Length 25 millims. A rounded core containing Orhicella, in the same state of fossilization 

 as the preceding. Ainpkisfegina in sediment filling up a boring in the coral. 



(182). Length 30 millims. Fragment of dense whitish rock, mainly composed of casts of Pocillopora 

 and Lithothamnion. 



(183) [648]. Length 33 millims. A nodular lump of porous rock, mainly of foraminifera and fragments 

 of other organisms cemented hy calcite. Orhitolites romplanata, Gijmhalopora, Garpenteria, Pohjtrema, and 

 Amphistegina, echinid spines, Serpvlu. 



(184). Length 30 millims. by 47 millims. wide. A nodular piece of grey rock; the only traces of 

 organisms are faint casts of Pocillopora. 



(185) [835, 836]. Sample of loose materials. The fragments are angular or sub-angular; principally 

 of Carpenteria, Polytrema, and Amphistegina Lessonii, also a specimen of Calcarina hispicla, determined 

 by Mr. Chapmax. Fragments of Litliotliamnion. Some of the organic fragments are partially enclosed by 

 calcite, showing that they have been produced by the breaking up of solid rock. 



Depth from Surface, 220-230 feet; Distance Bored, 10 feet; Total Length of Core 



Obtained, 4 inches; Number of Core, 186. 



The only solid cores from this 10 feet of the boring are four irregularly worn, 

 nodular pieces of moderately hard whitish-grey limestone, cavernous and porous, 



