REPOET ON MATERIALS FROM THE BORINGS AT FUNAFUTI ATOLL. 273 



Casts of PociUopom, Moiifi/jora (1), ;ind MiUcpura common. Cores mainly of fragmental materials, with 

 OrbUoliies, Pohjirema, Aiaphistegina, echinid spines, and much branching Lithotlmmnimi. Cliona borings. 



(404a). Length 204 millims. Rock grey, with very numerous, irregular patches of white, which are 

 branching and nodular fragments of Lilhofhaiiiidoit. Hard, mostly compact. Small casts of PocUlopura 

 and MiUepora. IMainly of detrital materials. Polytrema, Amplmtegimi. Casts of gastropods. 



Depth from Surface, 93G-945 /eeif ; Distance Bored, d feet ; Total Length of Core 

 OBtained, ^ feet 4 inches; Numbers of Cores, 405a-4-21a. 



Solid cylindrical cores of greyish-white, hard, for the most part, compact to porous, 

 dolomitic limestone, with occasional cavities. Corals are distributed throughout the 

 rock, but not uniformly ; some cores are nearly altogether composed of them, while 

 in others only a few small casts are present, and the rock is mainly of fragmental 

 materials, with Polytrema and other foraminifera, and branching and encrusting 

 Lit.hothamnion. The most abundant corals belong to Pocillopora, Coeloria, 

 Madrepora, and Porites, whilst Seriatopora, Astrwa, and Prionastrcea are less 

 numerously represented. Small forms of MiUepora occur, as in the preceding cores. 

 Alcyonarian spicules. The foraminifera include Orbitolites, Carjjenteria, Gypsina, 

 Polytrema, Amphistegina, and Heterostegina. Echinid spines, Serpula-txxbeB, casts of 

 gastropods, and Cliona borings. 



Details. 



(40.5a, 406a) [786]. Total length 256 millims. Greyish groundmass, filled with numerous white 

 fragments, chiefly of branching LitJwtJmmnion. A few. casts of Pocillopora, a simple Astrsean, and MiUepom. 

 Corals encrusted by Polytrema pAanuin and Lifhotliamnion. Alcyonarian spicules. Gypsina, Amphistegina, 

 Heterostegina. Echinid spines. 



(407a). Total length 453 millims. Greyish-white, hard, porous, with compact areas where corals have 

 been infilled with crystalline dolomite ; occasional small hollows. Casts of Pocillopffra, Ccehria, simple 

 Astraean, branching Madrepm-a, Porites arenosa, and MiUepora. The core is largely of detrital materials, 

 with Orbitolites, Carpenteria, Polytrema, Amphistegina (very numerous), echinid spines, and lAthothamnion. 

 Cliona borings. 



(408a). Length 153 millims. Greyish-white, hard, porous, with a few small hollows. About one-half 

 the core of casts of corals. Pocillopiora, Seriatopm-a, small Astraean, Orbicella, branching Madrepora, and 

 Porites; the corals are often encrusted by Polytrema planum. Orbitolites, Amphistegina very common. 

 Serpulortvibes. 



(409a). Length 256 millims. Rock greyish- white, hard and porous, like preceding. Casts of Pocillojjora, 

 Madrepora, and Porites ; the structure has beeii either dissolved away, or replaced by crj'stalline dolomite. 

 Foraminifera as in No. 408a. 



(410a, 411a). Total length 240 millims. Greyish-white, hard, compact to porous, with occasional 

 hollows. Casts of Pocillopora, simple Astraean, Madrepwa, and Porites arenosa. Orbitolites, Polytrema, 

 Amphistegina. Casts of gastropods. Lithothamnion. 



(412a). Length 120 millims. Whitish, with some grey areas. The white portions softer than the 

 grey, and occasionally efflorescent. Casts of Pocillopora, and Prionastrrea (1). Detrital materials, with 

 Orbitolites, Carpenteria, Amphistegina. lAthothamnion. 



(413a, 414a) [787]. Total length 228 millims. Whitish-grey, hard, partly porous, partly compact, 



2 N 



