REPOET ON MATERIALS FROM THE BORINGS AT FUNAFUTI ATOLL. 281 



Details. 



(508a, 509a). Total length 180 niillinis. Mottled greyish-white, compact to porous, occasional small 

 hollows. Casts of branching Madrepora. Small form of MiUeponi, fragment of Lobophyiinn, and detached 

 alcyonarian spicules. The larger part of the cores consist of detrital materials, with Orhitolites and 

 Amplmtegina, Echinid spines and manj' pieces of Lifhothanmion. 



(510a) [800, 801]. Length 308 millims. Speckled greyish-white, compact to porous, with many small 

 hollows. Numerous small coral casts, PociUopora, Seriatapora, simple Astraean, and Madrepora. Millepm-a. 

 The foraminifera comprise Orbifolites, Carpenferia, Gypsina inhceren.% G. glohuhm, Polytrema rniniaceiun, 

 P. pjlanurn, Aiiipjlmtpgina and IlHerostegina. Alcyonarian spicules, echinid spines, the structure well shown ; 

 fragmentary LithotJmmnion. 



(511a, 512a). Total length 174 millims. Mottled greyish-brown, compact to porous, with occasional 

 hollows. Casts of Seriatapora, Fungiu, and Madrepora, and other small corals too obscure to be determined. 

 Millepara. Orhitolites numerous, Polytrema pilamim encrusting corals, Amphistegina. Echinid spines, casts of 

 lamellibranchs. Lithothamnion. 



(513a, 514a). Total length 227 millims. Rock like the preceding; cavernous in places where corals 

 have been removed. Casts of Seriaiopora, Astnea, Fungia and Madrepiora {f) encrusted by Polytrema pilanum. 

 The detrital materials contain Orhitolites, Amphistegina, echinid spines and Lithothamnion. 



(515a) [802]. Length 403 millims. Greyish-brown, hard, partly compact, partly porous, dolomitic 

 limestone. The upper third of the core consists principally of corals : Seriaiopom, Astnea, and Montipx/ra (1) ; 

 the rest of the core, with the exception of casts of Seriatopora, is composed of detrital materials and 

 foraminifera : Orhitolites, Garpenteria, Gypsina, Polytrema, Amphistegina, and Heterostegina. Alcyonarian 

 spicules, echinid spines, encrusting and branching Lithothamnion. 



(516a, 517a). Length 227 millims. Rock like the preceding one. The upper core contains numerous 

 slender branches of Seriatopoi'a, encrusted by Polytrema planum. In the lower core besides Seriatapora, there 

 is a cast of a small Astrcea. In the detrital materials, the only organisms which can be recognised with a 

 lens are Orhitolites, Amphistegina, echinid spines and Lithothamnion. 



(518a). Length 232 millims. Greyish-white, mottled, hard, compact to porous. Largely of corals, 

 including Seriatopora, Cceloria, Astrcea and Madre^wra, encrusted by Polytrema and Lithothamnion. The 

 corals are very unfavourably preserved, being for the most part replaced by crystalline dolomite. 

 Orhitolites and Amphistegina. 



(519a, 520a) [599, 803]. Total length 134 millims. Whitish-grey, minutely porous, with compact 

 areas. Mainly of corals ; Gidoria, Madrepjora, Pmites, or Astrieopora in position of growth. Alcyonarian 

 spicules, echinid plates. Orhitolites, Ampliistegina. Encrusting Lithothamnion. 



(521a). Length 320 millims. Grey and whitish, hard, occasionally cavernous. Corals numerous, but 

 very indistinct. Stylaphora, PociUopora, and the same doubtful Porites or Astrceopora as in the preceding 

 core. Amphistegima. Large echinid spines. Branching and encrusting Lithothamnion common. 



(522a). Length 150 millims. Greyish-brown, hard, mostly compact, dolomite. Core mainly of 

 branching Pocillopara and indications of other corals as well. Branching Lithothamnion. No foraminifera 

 distinguishable Avith a lens. 



(523a). The length of the whole core is 947 millims. or about 3 feet 2 inches. It has been divided into 

 six subequal pieces averaging 157 millims. each. The pieces are numbered 1-6. 



(1-2). Greyish-brown, hard, compact to porous, with occasional small cavities. Numerous casts of 

 branching PociUopora, similar to that in the preceding core, and indications of a perforate coral, 

 replaced and nearly obliterated by the crystalline dolomite. Cast of gastropod, echinid spines. A 

 large quantity of branching Lithothamnion. Foraminifera not distinguishable with lens. 



(3). Greyish-brown, dense, minutely porous, occasionally cavernous. Several areas, now infilled with 

 crystalline dolomite, appear to have been originally corals, but nothing definite is shown beyond traces 



2 O 



