254 DR. G. J. HINDE. 



Depth from Surface, 810-815 feet; Distance Bored, 5 feet; Total leru/th of Core 

 Obtained, 3 feet 6 inches; Numbers of Cores, 175a-186a. 



Cores cylindrical, greyish-white, often banded or speckled, hard, partly compact 

 and dense, partly porous and cavernous dolomite. Corals are generally present, but 

 now frequently replaced and infilled solid with crystalline dolomite, and their characters 

 mostly obliterated. This applies more particularly to the perforate forms ; in the 

 Astrsean corals the structures are often dissolved and not infilled with dolomite, but 

 even under these conditions they can only approximately be determined. They 

 are included in Astrcea, Goniastrrra, Cycloseris, Madrepora, and Porites. The corals 

 are, as usual, encrusted by layers of Polytrema and Lithotliaynnion. 



A considerable amount of fragmental detritus with foraminifera is present in the 

 cores. The most abundantly represented are Orbitolites, Carpenteria, Amphistegina, 

 and Heterostegina. Alcyonarian spicules, echinid spines, and in the finer sediment, 

 stellates of Leptoclinum are present. Halimeda-]o\niB, 



Details. 



(175a). Length 80 millims. Greyish-white, hard, mostly compact, with occasional cavities. Largely of 

 a perforate coral, J/a'^/rr'ywvi' or Pr;;?7^'s, encrusted by J'oli/frciiin plainnii and some LHhoflMinmiov. Detrital 

 materials, with Aiiiplnxtcnina and Hcfcmstcj/ina, from the rest of the core. 



(176a, 177a). Length 72 millims. Greyish-white, hard, very cavernous. Faint indications of corals, 

 replaced by dolomite. Core mainly detrital, with Jiiij)hisfi'f/ina and Ht'ttrosfej/ina. Alcyonarian spicules. 



(178a). Length 173 millims., diameter 59 millims. Greyish-white, mottled, hard, mostly compact with 

 occasional hollows. Casts of Madrepora and Mmfijtora are fairly nimierous, they are mostly infilled with 

 crystalline dolomite, and encrusted by PoJi/trema and Lifhofhammon. Cast of Goniasfrrra (1). Amphistegina. 

 Haliineda. Clioiia boi'ings. 



(179a, 180a). Total length 140 millims. Mottled, whitish-grey, hard, porous in part. Cast of simple 

 Astraean coral, young form (?), and I'orifes, encrusted by Polytrema planum. Amphistegina. 



(181a). Length 122 millims. Greyish, banded white, hard, partly porous with elongate flattened 

 hollows. Core mainly of corals casts. Goniasfrcea (?) and Asfrmqioru. Detrital material between the corals, 

 with Orhifolifes, Poh/frema, and Amphistegina. Lithothamnion. 



(182a). Length 111 millims. In character similar to preceding. Core largely of casts of corals, 

 Goniasf/nm (1) AS in the preceding core, and undulating layers ol Monfijioni infilled with the crystalline matrix 

 and encrusted by Poh/freina. OrUfolUes, AinpJiistcgina. 



(183a) [732, 733]. Length 82 millims. Mottled, greyish-white, hard, mostly compact, with some 

 hollows. Cast of Goniasinva (?) replaced by dolomite, and Porites, with its interspaces infilled with fine, 

 opaque consolidated sediment. In this material there are numerous stellates of Lepfoclinniii. The 

 foraminifera comprise Ophthalmidiurn, (h-hitoUtes, Carpenteria, Calcarina, Gypsina, Poh/trenia planum, 

 Planorbnlina, Amphistegina, Heterostegina. Alcyonarian spicules ; echinid spines. Haliineda-jomts. 



(184a) [734]. Length 66 millims. Rock like preceding. Casts of Madrepora replaced by crystalline 

 dolomite and the interspaces filled with fine, consolidated sediment, Gypsina, Amphistegina, Heterostegina. 

 Alcyonarian spicules. Echinid spines. Halimeda. 



(185a) [735]. Length 98 millims. Mottled grey, hard, cavernous, where corals have been removed, 

 elsewhere mostly comj)act. Casts of Cycloseris, and indications of other corids now replaced by dolomite. 



