REPORT ON MATERIALS FROM THE BORINGS AT FUNAFUTI ATOLL. 279 



of Fungui {f), Madnpom and I'orites. Alcyonarian spicules. Lower half of core principally of detrital 

 materials, containing the same forms as the preceding with the addition of CHona borings. 



(475a). Length 123 millims. Greyish-white, mottled and speckled. Cast of Mudrepora, overgrown 

 hy Polyfreiua planum. Also cast of fragment of large bivalve shell; the shell has been dissolved away and 

 the space is now occupied with infilled Cliona borings. Echinid spines. Fragments of Lithothamnion. 



(476a-479a) [795]. Total length 395 millims. Greyish-white, hard, compact to porous. Casts of 

 Astnea, cf. Jt. Jobafa, numerous. Detrital materials are more abundant than corals in the lower cores. 

 The foraminifera include Orbifolites, Haddonia, Curpenteria, Folytrema planum, Araphisteginu and Heterofttegina. 

 Echinid spines. Encrusting and branching Lithothamnion, abundant. 



(480a). Length 163 millims. Greyish, with white areas, mostly compact. From one-third to one-half 

 the core of Pontes arenosa (1). Alcyonarian spicules, abundant. Carpenteria, Ariiphistegina and Heterostegina. 

 Casts of gastropods. Lithothamnion. 



(481a-484a) [796]. Total length 419 millims. Greyish, hard, porous. The cores consist of coarse 

 fragmental organic materials, cemented by the crystalline dolomite, but the interspaces are not complete^ 

 filled ; in the cores there are many coral fragments as well as thick bands of them in position of growth. 

 The corals comprise PodUopwa, Caloria, Madrepm-a, and Pmites. Alcyonarian spicules. The foraminifera 

 belong to Orbitolifev, Haddonia, Carpenteria, Polytrema, Amphistegina, and Heterostegina. Echinid plates and 

 spines. Numerous fragments of branching Litltothamnion. 



(485a, 486a). Total length 144 millims. Grey, hard, mostly compact, with porous areas. Cores 

 mainly of corals solidly replaced by crystalline dolomite. Parites arenosa and Ovbicella, cf . 0. heliopora. Lam. 

 Some coarse detrital materials with the same organisms as in the cores above, except that Haddonia and 

 Carpenteria were not observed. 



(487a, 488a) [797]. Total length 158 millims. Greyish-brown with whitish bands, hard, mostly 

 compact, cavernous. Cores chiefly of corals, growing in thick undulating, nearly horizontal layers ; they 

 belong to Porites, Montipora, Astraopora, and are partly overgrown by Polytreina and Lithothantnion. 

 Alcyonarian spicules. In the detrital materials, Orbitolites, Carpenteria, Gypsina, Amphistegina, and 

 Heterostegina are present, with echinid spines and plates and LepAocUnum stellates. 



(489a). Length 150 millims. Greyish-white, mottled; large hollows in places where corals have been 

 dissolved out. Thick layers of Porites and Astrceopora, overgrown by the Polytrema and Lifhothamni&n. 

 Larger half of core of coarse detrital material with Orbitolites, Carpenteria, and Amphistegina. 



(490a). Length 253 millims. Upper half of core whitish-grey, with layers of Astrceopora (1) and coarse- 

 grained detrital material with foraminifera, the same as in the preceding ; the lower half of much finer 

 fragmental material composed of the same kinds of organisms, solidly cemented with crystalline dolomite. 



Depth from Surface, 983-991 feet; Distance Bored, 8 feet; Total Length of Core 

 Obtained, 7 feet 1 inch; Numbers of Cores, 491a-507a. 



Cylindrical cores of greyish-white to greyish-brown, hard, dolomitic limestone. In 

 the upper 2 feet the cores are almost exclusively of foraminiferal and tragmental 

 materials of a uniform character ; in the rest of the cores there are in places some 

 casts of corals, but in the main the rock is composed of the same detrital material as 

 in the upper portion. The corals for the most part are unfavourably preserved ; they 

 belong to Cceloria, simple Astrsean forms, and Madrepora contecta. Millepora occurs 

 but rarely, while alcyonarian spicules are common. The foraminifera comprise the 

 usual forms : Orbitolites, Textularia, Carpenteria, Calcarina, Polytrema, Amphistegina 

 and Heterostegina. Echinid spines, casts of lamellibranchs and gastropods are present. 



