262 DR. G. J. HINDE. 



have been removed. Echinid spines vei'y numerous. Core mainly of detiital materials, with some grey 

 crystalline areas where corals have been replaced. 



(264a, 265a). Total length 304 millims. Cores whitish-grey, with whitish porous areas, hard. Large 

 hollows, lined by crystalline deposit. Rock of detrital materials; the only forms recognisable with a lens 

 are echinid spines. 



(266a). Length 110 millims. Greyish-white, banded, compact, with a few cavities. Greater part of 

 the core consists now of the secondary crystalline dolomite, showing in section the agate-like layers ; this 

 has probably replaced corals, of which there are some obscure traces. Only echinid spines to be seen 

 with a lens. 



(267a) [588]. Length 101 millims. AVhitish-grey, hard, generally compact. Now largely crystalline, 

 with some foraminifera and echinid spines. Bolirina, Cavpeninia, and Heferoiitpgina. 



('268a) [752]. Length 204 millims. Whitish-grey, mottled, hai'd, compact, with a few small hollows. 

 Casts of corals seen in thin section under the microscope, encrusted by layers of Pohitirmn /ilatniin and 

 Lifhofliainnlon. (Ji/psina and PoUjfreina iinniarcwn. Echinid spines. 



(269a, 270a) [753]. Total length 205 millims. Whitish-grev, hard, with small cavities. More than 

 half the core consists of a cast of a coral, partlj^ replaced by dolomite ; it appears to belong to Astura. Other 

 corals were originally present, judging from the areas now infilled with crystalline material. 



(271a) [754]. Length 97 millims. Greyish, hard, partly compact, with large hollows. Core mainly of 

 coral casts of the same Astraean as in the preceding. Echinid spines, somewhat triangular in section. 



(272a-276a). Total length 343 millims. Greyish-white, hard, with large hollows. Rock mainly of 

 the secondary crystalline dolomite with agate-like bands in section which has replaced corals. The only 

 organisms to be recognised with a lens are echinid spines and encrusting layers of Lifliof/iainnimi. 



Depth from Surface, 866-874 feet; Distance Bored, 8 feet; Total Length of Core 

 Obtained, 5 feet 4 inches ; Numbers of Cores, 277a-296a. 



Cores cylindrical, of greyish and greyish -white, hard, dolomitic rock, partly compact, 

 jjartly porous, oftentimes with large irregular cavities lined with the crystalline 

 deposit. In the up])er cores the rock mainly consists of this secondary dolomitic 

 material, which has a]jpareutly replaced corals and other organisms so that hardly 

 any are distinguishable under a lens. In the cores from 283a (about 870 feet) 

 downwards, coral casts constitute the larger part of the rock ; they are often indistinct, 

 the structure having been replaced by dolomite, whilst the interstices are filled in with 

 fine consolidated organic sediment. The corals belong to Focillopora, Astrcca, Goni- 

 astrcea, Fungia{1) Madrepora, including M. contecta, and Forites. Foraminifera are 

 less prominent, they include Orbitolites, Globigerina, Carpenteria, Calcarina, Gypsina, 

 Folytrema, Arnphistegina, and Heterostegina. Detached alcyonarian spicules and 

 pieces of Lobop)hytnm occur. Echinid spines, Serp'iiJa, together with Lithodomus 

 (boring into corals), Halimeda and Lithothamnion. 



Details. 



(277a, 278a). Total length 192 millims. Greyish, hard, dolomitic rock, with large hollows, hncd with 

 crystalline material, showing in section banded agate-like layers. Probably the cores M'ere originally of 

 corals, but only faint indications of an Astrjean coral are now distinguishable. 



(279a, 280a). Total length 186 millims. Rock of the same character as the preceding but less cavernous. 

 Only imperfect casts of an Astrasan coral with Aiiqilmtcyinu and echinid spines can now be recognised. 



