REPORT ON MATERIALS FROM THE P.ORIXGS AT FUNAFUTI ATOLL. '239 



foraminiferal j Poli/treina iijanum, Gtjpxina glohuhiA, Amphistegina, Heterostcgina, Cydodypma, common. 

 Litlinfluwvnion, 



(ILi) [684]. Length 190 millims. White, porous, soft, with occasional small cavities. Casts of a 

 few small corals, very indistinct, Cijdoseria (1) and Madrepora (1). The larger part of the core foraminiferal ; 

 including Carpenteria, Glohigerina, Gi/psina, Fohjtrema planum growing, in nodose masses, round corals, 

 gastropods, and other bodies, Amplmtegina Lessonii, very numerous, Heterostegina, and Cyclochjpeu^ also 

 very abundant. Casts of gastropods. 



(12a). Length 72 millims. White, very porous, soft ; can be scratched by the finger nail. No corals 

 recognised. Nodules of PoJi/freina planum very prominent, foi'ming a considerable part of the core. 

 Other foraminifera the same as in the preceding. Halimeda, Lithothamnion. 



(13a). Length 74 millims. "V^Tiite, porous, soft, like preceding. Cast of Ci/closeris. Mainly 

 foraminiferal, but joints of HoMmeda very numerous. AlveoUna definitely noticed for the first time. 

 Amplmtegina, Hcterosfrgina, Poh/frema plamim, Ci/rloclyprus. 



(14a, 15a) [685]. Total length 176 millims. White, very porous dolomitic rock, somewhat harder than 

 the preceding cores. The pores and small caA-ities and also the foraminifera lined ])y rhombohedral crystals. 

 The foraminifera are indistinctly shown ; they consist of Alvcolina, Glohigerina, Gijpsina glohuhix, Calmrina 

 Iiisjnda, Amphistegina, Heterostegina, Pohjtrema pAanum, and Cgdochjpeus. Halimeda very a1)undant. Echinid 

 spines. 



(16a) [686]. Length 60 millims. White, very porous, dolomitic limestone. I£alimeda-]omts form a 

 considerable part of the rock. Foraminifera numerous ; of the same forms as in the preceding core, but 

 the incrusting Pohjtrema does not seem to be present. The onlj^ coral is a small cast of Cycloseris, cf. 

 C. cydolites. 



Depth from Surface, 7S6-74:8 feet ; Distance Bored, '12 feet ; Total Length of Core 

 Obtained, S feet 5 inches ; Numbers of Cores, 17a-31a. 



Cores cylindrical, of whitish to cream-tinted, for the most part porous, dolomitic 

 limestone. The first four cores, Nos. 17a to 20a, are of soft rock, which can be 

 scratched by the nail, the succeeding cores are much harder, but these are readily 

 scratched by l^nife. The cores vary much in their degree of porosity, the upper and 

 some of the lower are open in texture and resemble the preceding cores, whilst in 

 others the interspaces have been almost entirely infilled with the crystalline dolomite, 

 and the rock is nearly compact. There is not not much difference in the organisms 

 composing the cores ; the rock is mainly foraminiferal in character. The most 

 prominent forms are Pohjtrema planum, and large varieties oi Amphistegina Lessonii 

 and Heterostegina depressa. AlveoUna and Cycloclypeus are present in the upper 

 cores, but have not been noticed in the lower. Corals are comparatively scarce and 

 only occur as indistinct casts. One or two Astrseans, Cyphastraa, Cycloseris, 

 Madrepora, and Porites. Halimeda is no longer abundant as in the preceding cores, 

 Lithothamnion is present as thin crusts alternating with Polytrema planum. 



Details, 



(17a). Length 36 millims. Whitish, soft, porous, can be scratched by finger nail. Mainly of foraminifera 

 and joints of Halimeda. Amphistegina, Heterostegina, Cydodypeus. Cydoseris cast and piece of perforate 

 coral. 



