REPORT ON MATERIALS FROM THE BORINGS AT FUNAFUTI ATOLL. 253 



hollow, Jiiid huve the tubulae preserved. Casts of a small Madrepora, solidly infilled with crystalline 

 dolomite. Amplmtegina. HaJiineila. 



(158a, 159a). Total length 14:1 millims. Whitish-grey, mottled, mostly compact, with occasional 

 cavities. Casts of PocUlojwra, an Astraean, and indistinct perforate corals, some solidly infilled with the 

 crystalline matrix. The corals are enclosed by layers of LifJiot/iainnion. Foraminifera not distinguishable 

 with a lens. 



(160a). Length 52 millims. Greyish, speckled, hard, partly porous. Apparently detrital in character, 

 solidly infilled with the dolomitic matrix, only small, white patches of TMIiotlmiiinion distinguishable. 

 Casts of large gastropod, and of a lamellibranch. 



(161a) [729]. Length 147 millims. Greyish-white, mottled, porous, with some cavities. More than 

 half the core filled with a branching Pocillopora, in position of growth, similar to that in 157a. In the 

 lower half of the core a small Astrsean and Montipom (?) filled with the crystalline dolomite. Foraminifera 

 in fine sedimentary material containing Leptodinniii stellate spicules, now replaced. OrbitolUes, Globigerina, 

 Calcarina, Polytrema miniarewii, P. planum, Aiaphistegina, Heterosfegina. Echinid spines. Alcyonarian 

 spicules. Casts of gastropods. Encrusting Lithothamnion, Haliimda. 



162a. Length 132 millims. Whitish-grey, hard, partly compact, partly porous dolomite. The upper 

 third of the core consists of a cast of Cceloria ; in the lower portion, Madrepora, with other small perforate 

 corals, the character's nearly obliterated. Rest of core foraminiferal and fragmental. Polytrema planum, 

 and Amphisfegina. Litlwthammon. 



(163a) [729a]. Length 178 millims. Mottled whitish-grey, hard, partly compact, partly porous, with 

 occasional small hollows. Core principally consisting of casts of corals either porous or solidly infilled 

 with crystalline dolomite. Pocillopora common, Madrepom, Astrmopora, and Montipmu (1). The corals 

 overgrown by Polytrema planum and Lithothamnion. Amphisfegina. Areas of fine detrital mud with 

 numerous stellate spicules of Jjeptodinnm. 



(164a). Length 100 millims. Rock of similar character to the preceding. Pocillopmu, Madrepm-a, 

 Pmites, Pohjtrema planum., and Amphisfegina. Lithothamnion as nodules and encrusting layers. 



(165a) [730]. Length 107 millims. Whitish-grey, hard, partly compact, partly porous dolomite. 

 Casts of Madrepora and Tihrhinaria, encrusted by thick layers of Polytrema planum and Lithothamnion. 

 About half the core detrital and foraminiferal. Amphisfegina. Alcyonarian spicules ; echinid spines ; 

 Serpula. Casts of gastropods. 



(166a). Length 84 millims. Greyish, speckled, hard, compact, with porous areas. Core apparently 

 altogether of foraminifera and fragmental material. Amphisfegina. Lithothamnion. 



(167a). Length 80 millims. Greyish, hard, in part porous, where corals are present. Madrepora cast, 

 enclosed with thick layers of Polytrema planum, and some Lithothamnion. Foraminifera not distinguishable 

 by lens. 



(168a). Length 74 millims. Grey, speckled, hard, porous. With the exception of a small cast of 

 Pocillopora, the core is detrital, with foraminifera, but only Amphistegina can be distinguished. Alcyonarian 

 spicules. Echinid spines. Lithothamnion. 



(169a, 170a, 171a). Total length 171 millims. Whitish-grey, hard, porous, and very cavernous. 

 Casts of Pocillopora, Seriatopara, and Madrepara. The corals overgrown by Polytrema pkmwm and 

 Lithothamnion. Amphistegina. Coarse detrital materials, the interspaces but partially infilled with crystalline 

 dolomite. 



(172a, 173a). Total length 86 millims. Grey, hard, porous rock. Only alcyonarian spicules 

 recognisable. 



(174a) [731]. Length 77 millims. Mottled grey and white, hard, compact to porous. Several casts of 

 small corals ; Fungia, Madrepora, and other perforates enclosed by Polytrema and Lithothamnion. Textularia 

 rugosa, Gypsina inhcerens, G. discus, Amphistegina Lessonii numerous^ and Heterostegina. Alcyonarian spicules, 

 echinid spines. Casts of gastropods. 



