kEPOl^T ON MATEliTALS FROM THE BORINGS AT FUNAFUTI ATOLL. 309 



encrusted l)}- layers of Pol iff renin jihuruit and Litholhuimiion. Surface in places pitted, with S/iinirhix 

 attached. 



(D. 46-D. 50). Total length 112 niillims., width about 70 millims. Four irregular pieces of greyish- 

 white, hai-d, limestone, consisting of Madrcpora with Clhina borings. 



(D. 51) [426]. Length 75 millims., width 80 millims. Greyish- white limestone, consisting of a mass of 

 Montipoiu (T), encrusted by Poh/firiiin pJannm and LUhofhaiiinhm. Orhifolif/'s and (hipdim inha'mi^. 



(D. 52). Length 47 millims., width 79 millims. Cylindrical core of Montipora (1) similar to the 

 preceding. 



(D. 53, D. 54). Total length 109 millims., width 80 millims. Cylindrical cores of greyish-white, hard 

 limestone, consisting of Madrcpom conhrfa, perforated by Cliona. 



(D. 55). Length 40 millims., width 58 millims. An irregular fragment of Mudnpoiu contcda. 



(D. 56). Length 62 millims., width 83 millims. Cylindrical cores, cavernous, of the usual greyish- 

 white dense limestone, composed of Montipora (1), bored by Cliona, and encrusted by Lithothainnum. 



(D. 57) [410]. Length 74 millims., width 75 millims. Cylindrical core, cavernous, of greyish-white, 

 hard, mostly compact, limestone, the surface in places pitted, and with Spirorlii^ attached. ]][udivpora 

 conteda (?), encrusted by Lithofhainnion and overgrown by Mordipora (■?), very obscurely shown, and this 

 in turn" covered by layers of Pol/ffrciiia planum and Lifhofliauimon. Oii)itolik'», I'uh/frcinu iniiduceuiii. 

 Echinid spines. 



Depth from Sarface, 60-72 feet; Distance Bored, 12 feet; Toted Lenijth of Cores 

 OhtoAned, '2 feet 6 inches; Numbers of Cores, D. 58- D. 74. 



Cylindrical cores, and irregular nodules of cream-coloured and whitish-grey, hard, 

 mostly compact limestone, of the same character as those from the higher parts of 

 the boring. The greater part of the rock consists of corals, Madrepora, contecta 

 being still the predominant form ; with it there are associated Pocillopora, 

 Orhicellafi), MontiiJoi'ci, and detached alcyonarian spicules. Corals, generally filled 

 up solid with sclerenchyma, &c., and very obscurely shown. Foraminifera are seldom 

 met with in the cores, but in a sample of unconsolidated material from a depth of 

 70 feet they are abundant and varied. The following genera have been recognised 

 by Mr. Chapman : Co)-n,nspira, Orhitolites, Sagrina, Globigerina, PuUenia, 

 Spirillirta, Disco/'hrua, Plauorhulina, Pulvinidina, Calcarina, Tmoporas, Polytrema, 

 Amphistegina, and Hetovstegina. Associated with these there are calcisponge 

 spicules, Cliona borings, echinid spines, Serpida, and Spirorhis, ostracoda, lamelli- 

 branchs, and encrusting Lithotliamnion. 



Details. 



(D. 58). Length 50 millims., Madth 80 millims. Core of whitish-grey, compact limestone, both ujjper 

 and lower faces pitted. Nearly the entire core of Madrepora conteda (?) ; a small fragment of Montipora. 

 Polijfreina ininiaceum. Cliona borings. LitMhamnion. 



(D. 59). Length 74 millims., width 77 millims. Cylindrical core, cavernous, of the same land of rock, 

 and with the same organisms as the preceding. Spnrarhis, Serpula. 



(D. 60). Length 40 millims., width 50 millims. An irregular, cavernous jjiecc of whitish-grey limestone, 

 with Focillopora and OrhiceUa {%). Echinid spines, Spirorhis. 



(D. 61) [427]. Length 52 millims., width 75 millims. A conical piece of the same limestone as 



