268 DR. G. J. HINDE. 



Depth from Surface, S99-910 feet ; Distance Bored, 11 feet; Toted Length of Core 

 Ohtained, II feet ; Numbers of Cores, 341a-353a. 



This 11 feet of the boring is represented by an equal length of solid cylindrical 

 cores, some of which are more than 2 feet in length, and have had to be cut into 

 shorter lengths for convenience of study. The rock is whitish to whitish-grey, 

 occasionairy mottled and speckled, hard, dolomitic limestone, for the most part 

 compact, but with porous areas and occasional hollows. It is composed, to a con- 

 siderable extent, of corals with intermediate portions of fragmental debris of organisms, 

 with foraminifera and LitJiothamnion. Some of the cores are almost entirely of 

 corals, whilst in others the fragmental materials, cemented by crystalline dolomite, 

 predominate. The corals are poorly preserved, for the most part replaced by dolomite, 

 and with the interspaces of the same material or of fine consolidated sediment, or they 

 have been dissolved away leaving hollows. They belong to AstrcBa, Gomastnea, 

 Gcdaxea, Prionastrcea, Madrepora, AstrcBopora, Porites and Montipora. Of the 

 alcyonaria, detached spicules and Lohophytum are present. Porites is very common, 

 and occurs in somewhat large masses. The foraminifera belong to Orhitolites, very 

 common, Calcarina, Gypsina, Polytrema, Amphistegina and Heterostegina. Echinid 

 spines, Serpida, casts of gastropods and lamellibranchs. Lithothamnion, both 

 encrusting and branching, is very })lentiful. Infilled borings of Gliona. Professor 

 David considers tliat thecorals in these cores are chiefly in silv, and that the rock has 



the character of a coral reef. 



Details. 



(3-IIa). Length 120 millinis. Greyish-white, mottled and gpeckletl, huid, mostly compact. About half 

 the core of rorifea arenosa, solidly replaced by crystalline dolomite, and Monfipom, encrusted by LitJiO' 

 ihnmnion and Pol i/t re ma planum ; the other part cf finely fragmental material, with Jniphisfer/ha, branching 

 Lifhoflmmnion, S:c. 



(342a-344a) [775]. Total length 196 millims. Greyish-white, hard, mostly compact, with small 

 hollows. About half the cores of a small foim of Adrma and traces of perforate corals, the remaining 

 portion detrital with Urhitolifca, Calcarina, Gijpaina inhcprens, G. rp.uruJari^, var. discus, I'oli/ln'iiia plan.um, 

 ylmplmtegina and Hcfcroafcfjina. Alcyouarian spicules, partly as hollow casts ; encrusting and branching 

 Lithotlmmnion. 



(3-15A) [776]. Length 384 millims. Greyish to greyish-white, partly mottled and speckled, mainly 

 compact, with occasional hollows. From one-half to two-thirds of the core consists of casts of corals, 

 mostly replaced by crystalline dolomite ; they belong to Adra'd (the same form as in the preceding), 

 Goniaslrcea (1) Madrepora ronti'da, I'nrifcs arcnosu and Montipwa (V). Also Lohophi/fum and detached alcyouarian 

 spicules. In the fragmental part of the cores, Orhitolites, 'Textuluria, CaJrurina, Gjipsina inhcerens, Poli/treiiia 

 miniaceum, P. planum, Amplude(/ina and Ileterodegiaa. Encrusting and branching Litliolltamnion. Serpula. 

 Casts of gastropods. 



(346a). Length 808 millims. The core has been cut transversely into six pieces, which are numbered 

 1-6. Whitish to whitish-grey, occasionally mottled, dolomite, hard, mostly compact, with some occasional 

 hollows. The higher two-thirds of the rock, or about 530 millims., mainly consist of consolidated 

 detrital materials with foraminifera and encrusting and branching Li/Iiofhamnion, together with some 

 obscure perforate corals of small size. The lower part of the core contains casts of ^Istrrca, Prionadraa, 



