196 im. G. J. HINDU 



aerulm, with pieces of Millepum nudusa and Madrepora. The greater part of the core is a hard, grey 

 detrital sediment, with numerous foraminifera, belonging to Orbitolite:<, Tinwpm-as, Poli/tieina miuiaceum, 

 P. planum, and Amphistegina. Lithothamnion. Gastropod shells. 



(3) [503]. Length 120 millims. Core cylindrical, composed of lumps of Millepom nodosii, Heliopffra 

 ca'Tidea, and pieces of Alcyonarian stems, referred to Lohophijtuni, with branching Litliotluminkm. The 

 Lohcyphytum stems are sub-cylindrical, the longest fragment measuring 57 millims. in length by 18 millims. 

 in thickness; they are made up of robust, tuberculated, fusiform spicules, ranging up to 2 millims. 

 in length by 0'5 millim. in thickness. The spicules are nearly in contact, but without definite 

 arrangement. The stems are overgrown by several successive thin layers of Lithothamidon, which have 

 probably tended to prevent their disintegration. The same kinds of foraminifera are present as in 

 the preceding core, with the addition of Xubecularia. Serjnda-tnhes. Gastropod shells. 



(4) [604-606]. Length 85 millims., width 102 millims. Cylindrical core, almost entirely of Madrepm'u 

 conteda ; the interstices of the corallum are now, to a large extent, filled up solid with sclerenchyma. 

 Borings of Cliomi in places. The coral is suiTounded by a whitish hard sedimentary material, containing 

 Orbiiolitex, Haddonia, Spir(yrhis, stellate spicules of Leptoclinum and Lithotluiianion. 



(5) [504, 505]. Length 114 millims. Core cylindrical ; the central part of it consists of a large mass of 

 Astnen sp., encrusted by Polytrema planum and thin layers of LWiothavmion, and these, in turn, are 

 overgrown by an undetermined perforate coral. A thick wall-plate of Ileliopora aeruJi'd, perforated 

 by C'lioud. Fine-grained detrital material containing Orhitolites cuinplanuta, Ti'nopm'iis baculntus, (r;/2)sina 

 inh(erens, Polytrema miniaceum, echinid spines, Lc/ifocUnnnt spicules, Holothurian plates and bi'anching 

 Lithothamnion. 



(6). Length 30 millims. A fragment of hai'd limestone with the same form of Astncu as in the 

 preceding core. Nodular Lithothamnion. 



(7). Length 108 millims. Cylindrical core of a grey, hard, cavernous limestone, composed of pieces of 

 Ueliopora cmulea and Madrepora, with a considerable amount of encrusting and branching Lithothamnifm. 

 At base of core a layer of foraminifera, chiefly lielonging to 'Tinoporiis, Polytrema miniaceiim, and 

 Amphistegina, partially cemented together. Echinid spines. Serpiiln and Spirorbix. Gasti'opods. 



(8). Length 34 millims. Nodular lumj) of hard grey coral rock, consisting of Heliopom raridca, Pmitex, 

 Lithothamnion with foraminifera, filling the interspaces. Same forms as in preceding core with the addition 

 of Orbitolites. 



(9, 10, 11) [607]. Lengths 38, 30, 44 millims. Three nodular lumps of rock similar to preceding, 

 consisting of Heliopora cwrulea, much bored by Cliona, Madrepam, Lithothamnion, both encrusting and 

 branching. Polytrema miniaceum. Spirorhis. Gastropod shells. 



Depth from Surface, 10-20 feet '; Distance Bored, 10 feet ; Total Length of Core 

 Obtained, 2 feet 5 inches; Numbers of Cores, 12-18. 



Whitish-grey, grey, and mottled limestone, haid, in part cavernous, in part massive, 

 the higher cores mainly of corals ; Ileliopora, Pocillopora and Madrepora ; the lower 

 cores, Nos. 15-18, principally of branching Lithothamnion witli Polytrema ^.ifenwwi-. 

 The interspaces between the corals and between the branching Lithothamnion are filled 

 in with whitish detrital sediment consisting of foraminifera, echinid spines, stellate 

 spicules of ascidians, &c. This material in some places is consolidated into hard rock, 

 in other places, even in the same core, it is incoherent, loose and powdery. The corals, 

 foraminifera, and calcareous alo-ae retain their structures and are in the same condition 

 of preservation as those nearer the surface, referred to above. 



