KEPORT ON MATERIALS FROINI THE BORINGS AT FUNAFUTI ATOLL. 2G9 



Porites and Asfrwnpora (I) with a considerable admixture of detrital material as well. The foraminifera, 

 recognised with a lens, belong to Orhifolites, Polyfrema, Am][)histegma, and Hetcroatcgina. Casts of 

 lamellibranchs. 



(347a). Length 318 niillims. AVhitish-grey, hard, partly porous, partly compact rock, with small 

 hollows. About one-third of the core consists of corals belonging to Oalaxea, cf. G. Lamairki* Edwakds 

 and Haime, and Porites arenosa, partly enclosed by Puhjfrema ijlanum. The greater portion of the core 

 of minute fragmental debris, with OrhitoJites, Carpenteria and Amplmtegina. Casts of lamellibranchs. 

 Lifhothamnion abundant. 



(348a, 349a). Total length 263 millims. Whitish-grey to grey, partly compact, partly porous, with 

 occasional hollows. Mainly of coral casts solidly replaced by crystalline dolomite and overgrown by 

 Polijtrema and LifJiofJmrnnion. With the exception of an example of Pocillopora and one of Madrepora, the 

 corals belong to Porites arenosa. In the detrital materials alcyonarian spicules and OrUtolites. A group of 

 infilled borings of Cliona. 



(350a). Total length 481 millims. The cylindrical core is divided into four pieces. Greyish to greyish- 

 white similar to the preceding. About two-thirds of the core consist of corals, Madrepom and Porites arenosa ; 

 of the latter one specimen apparently in position of growth is about 180 millims. in length and wider than 

 the core (57 millims.) ; it is now solidly infilled with crystalline dolomite. Also a specimen of Lobophytum, 

 90 millims. long and in one part exceeding the core in width. In the detrital portion of the core OrUtolites, 

 Polytrema, and Amphistegina. Lithothamnion, both encrusting and branching. Casts of lamellibranchs. 

 Cliona borings. 



(351a). Length 143 millims. Greyish, spotted white in places, hard, mostly compact. The lower half 

 of the core consists of Porites arenosa (J), the upper of detrital fragments, containing numerous branching 

 pieces and encrusting layers of Lithotlmmnion with some OrUtolites and Polytrema. 



(352a) [777]. Length 611 millims. The core is divided into four pieces. Greyish, with white areas, 

 hard, for the most part compact, with only occasional small hollows. In the upper part of the core, casts, 

 now infilled with dolomite, of Astreea (the same as in core 270A, 863 feet), Madrepora, and Porites. The 

 spaces between the corals and the lower third of the core consist of detrital fragments with alcyonarian 

 spicules, OrUtolites, Polytrema miniaceum, P. 'planum, Heterostegina, echinid spines, Leptoclinuni stellates, and 

 Lithothamnion, firmly cemented together by crystalline dolomite. 



(353a). Length 109 millims. Greyish, hard, mostly compact, with small cavities. In lower part of 

 core a specimen of Galaxea similar to that in core No. 347a. Core mainly of minute detrital materials 

 with some obscure corals. Alcyonarian spicules, Polytrema planum, and Lithotlmmnion, 



Depth from Surface, 910-922 feet; Distance Bored, 12 feet; Total Length of Core 

 Obtained, 11 feet 4 inches; Numbers of Cores, 354a.-37<5a. 



Solid cylindrical cores of grey, mottled with white, hard, mostly compact, dolomitic 

 limestone in the upper half of the boring, whilst the same kind of rock in the lower 

 half is whitish or cream-tinted, and in places efflorescent. Corals are present 

 throughout, they are in the same imperfect state of preservation as noted above. 

 Some of the cores are principally composed of corals, whilst in others only one or tw^o 

 are present, and the main portion of these cores consists of foraminifera and minute 

 organic fragments, now cemented by crystalline dolomite. The predominant coral is 

 Porites arenosa and forms of Astrcsa, Orbicella, and Madrepora (including M. contecta) 



* 'Hist. Nat. Corall.,' vol. 2, p. 225. 



