300 DR. G. J. HINDE. 



areas, hard, very cavernous. Nodular mass of Heliopm'a carulea, the corallites mostly infilled with fine 

 sediment, and excavated by Cliona. Psammocam. Corals overgrown with Polylrema and Lifhotlmmnion. 

 Consolidated sediment, with Nitbecularia, OrUtolUes, Carpentcria, and Gypsina. Echinid spines. Serpuhi- 

 tubes. LcpforUnmii stellates, and Halimeda. 



(C. 13). Length 80 millims., width 79 millims. Cylindrical core, very cavernous, generally similar to 

 preceding, with Heliopora and Psammocm-a. Pohjtrema, Halimeda, and Lithothamnion. 



(C. 14). Length 57 millims. A fragment of core, composed of Heliopom ccerulm. 



(C. 15). Length 67 millims. A fragment of core, brownish on outer surface, and greyish-white to 

 greenish in section. Hard, compact to porous. Heliopm-a, bored by Cliona, Montipora. Encrusting 

 Lithothamnion. 



Depth from Surface, 50 to 80 feet ; Distance Bored, SO feet ; Total Length of Core 

 Obtained, [foot 5 inches ; Numbers of Cores, C. 16-C. 22. 



This part of the boring is only represented by six pieces of solid core, some 

 cylindrical, others irregular nodular lumps of cream-tinted, greyish-white and greenish 

 limestone. On the whole, the rock is of a similar character to the preceding. It 

 consists largely of Heliopora ccerulea, now of a dirty -greenish tint, and retaining its 

 structure unaltered. Other corals associated with it are Stylophora, Astrcsa (?), 

 Porites (?), and Fungia. The corals are in part surrounded by fragmental materials 

 and sediment, in some places cemented into hard rock, in others loose and friable. In 

 these fragmentary materials there are Orbitolites, Discorhina, Planorbulina, 

 Carpenteria, Polytrema, and Amphistegina. Also echinid spines, Cidaris, Serpula, 

 Spirorbis, Leptoclinum stellates, small gastropods, Halimeda, very common, and 

 Lithothamnion, both encrusting and branching. Infilled Cliona borings. 



Details. 



(C. 16). Length 130 millims., width 64 millims. Cylindrical core, cavernous, brownish on exterior; in 

 section cream-tinted to greenish. Thick wall-plate of Heliopm-a rarxlm, bored ))y Cliona, and encrusted by 

 Lithothamnion and Polytmna. Small specimen of Stylophora. Mass of hard, dense sediment, with echinid 

 spines and a small Cidaris. Small gastropods. Halimeda abundant. Branching LithotJiamniou, with 

 Serpula attached. 



(C. 17). Length 25 millims., width 63 millims. A flattened nodule of cream-tinted limestone, 

 composed mostly of A^trcva. (1), poorly shown ; a small piece of Heliopwa is attached to it, also Spirorbis. 



(C. 18). Length 40 millims., width 50 millims. A nodular mass of Heliopm-a ccerulea, bored by Cliona, 

 and partly overgrown by Litliotliamnion. 



(C. 19) [308]. Length 118 millims., width 80 millims. Cylindrical core, cavernous, greyish-white, with 

 greenish mass of Heliopora, which is embedded in fragmentary materials, partly cemented into hard rock 

 partly loose and friable. The Heliopm'a is encrusted by Polytrema planum and by Lithothamnion ; piece of 

 Astra'a (1). The foraminifera in the debris belong to Orbitolites, DiscwUna, Carjjenteria, and Amphistegina. 

 Echinid spines. Small gastropods. Leptoclinum- stellates. Numerous detached joints of Halimeda. 



(C. 20). Length 60 millims., width 76 millims. A nodular mass of greyish, porous limestone, mainly 

 consisting of organic fragmental debris, with foraminifera, and with Heliopora firmly cemented together. 

 Orbitolites, Pohjtrema miniaceum, echinid spines, Serpula, small gastropods, Halimeda abundant, and Litho- 

 tlmmnion. 



