282 DR. G. J. HINDE. 



of Madrepora. Larger part of core of detrital materials in which alcyoiiarian spicules, echinid spines, 

 Orlnfohfe.% and a considerable amount of Lifhofhajjinion can be distinguished. 



(4-5). Whitish-grey, hard, miiuxtely porous. Cast of Prionastrfva magnifica (?) Blainv., indications 

 of Porife-i (?), and other corals too indistinct to be determined. Stem of Lohoplnifinn and detached 

 alc3'onarian spicules. OrhifoUfex, Ainplmteiiinu and fragments of Lifhofhainnion. 



(6). Grejnsh- white, speckled, minutely porous. Casts of PociUqwnt, an Astrsean (1), C'l/pliasfraa, and 



a Fungid coral partly encrusted by Polytrenia. Alcyonarian spicules, numerous. Greater part of 



the core consists of minute fragmentary materials with Orhifolit<'6, Ainpliistegina, echinid spines and 



fragments of LifhofJianinion. 



(524a, 525a). Total length 299 millims. Greyish-luown, speckled, compact to poro\;s, cavernous in 



places. Casts of Scriatopora, Cijphn^fm'a (1), MuiJirpimi and indications of other corals which are now 



replaced by cr^'stalline dolomite. MiUcporu, about 70 millims. in length and widei' than the core 



(58 millims.). Alcyonarian spicules numerous. Fine detrital materials with Orliifolifcx and other forms as 



in the preceding cores. 



(526a, 527a). Total length 198 millims. Speckled gre3'ish-1)ro\vn, hard, compact to porous. Casts of 

 Seriatoptmi, simple Astraean and other corals not recognisaljle. Cores chiefly of fragmental materials. 

 Alcyonarian s})icules numei'ous ; Urbitolites, Pohiti-nmi, ^■tiiij)Iiix/''(/iiui, l)raiiching Lilhufliit/iniioit. 



Depth from Surface, 1006-1015 /cf^ ; Distance Bored, ^ feet ; Total Length of Core 

 Obtained, 9, feet 6 inches; Numbers of Cores, 528a-542a. 



Solid cylindrical cores of greyish-brown, hard, dense, dolomitic limestone, generally 



compact, but with occasional hollows, which are lined by concentric layers of 



crystalline dolomite. Corals are very generally present in all the cores, })ut only in 



some do they constitute tlie greater part of. the rock. They are very imperfectly 



preserved, for the most part they have been replaced by the crystalline dolomite, 



leaving but scanty indications of their characters. The genera recognised are 



Stylophora,, Pocillopora. Seriatopora, Caloria, Astraa (?), Orhicella, Cypliustrcea, 



Madrepora, Montipora, Porites, and Astrceopora. Millepora and alcyonarian 



spicules are present. The foraminifera and detrital materials filling the areas 



between the corals include Miliolina, Orhitolites, Gaudryina, Valvulina, Carpentena, 



Gypsina, Polytrema, Ampliistegina, Heterostegina ; also echinid spines, Serpula- 



tubes, casts of gastropods and lamellibranchs, Haliineda-^o'ints, branching and 



encrusting LitJt oth a'ninion. 



Details. 



(528a-532a). Total length 318 millims. Speckled greyish-brown, compact to minutely porous, occasional 

 irregular hollows. Casts of Seriafopora and other small corals now rejjlaced by crystalline dolomite. 

 Millepora, alcyonarian spicules, numerous. Larger part of the rock consists of detrital fragments with 

 Poli/lrt'ijiii, AiiqjJtisfi'ijinci, echinid spines, and L'tthotJiaiiinion. 



(o33a). Length 445 millims. Greyish-bi'own, hard dolomite with iiiegular hollows. Casts of 

 PbcUlopoia, Seriafopora, C/eloria, Vjiphuafraa and Madrepora. Alcyonarian spicules. Foraminifera verj' 

 obscurely shown, only Orhifolifes, Poli/frema, and AinpJiisfeiiina recognised. Echinid .spines. Lithothuinnioii. 



(534a) [804]. Length 48 millims. Greyish-brown, hard, porous, dolomitic rock, principall}' of Cidmiu, a 

 contiiuiation of the specimen in the preceding core. Alcyonarian spicules. The foraminifera shoMii 

 in the microscopic section comprise, VaJralino, Carpenfcria, Gifpsina, I'oh/trenni miniaceum, AmijliisieAjina, and 



