220 DE. G. J. HINDE. 



were met with in the next 3 feet of the boring, with a total length of 1 foot 6 inches ; 

 between 433 and 450 feet, only the broken-up rock-chips and dust were brought to 

 the surface. The solid cores are principally cylindrical with some irregular lumps 

 rounded by the drill ; they are of whitish and whitish-gre3% hard, calcareous rock, 

 cavernous where corals have been present and partly dissolved, and generally compact 

 where the rock is mainly foraminiferal and detrital. The rock interspaces are filled 

 with calcite. The corals are all as casts ; they belong to Seriatopora and Madrcpora. 

 The foraminifera are numerous, some of the cores appear to consist entirely of tliem, 

 as a rule, they are of the same character as the preceding ; in one instance, however, 

 a microscopic section showed that the rock was filled with Ccdcarina hispida, Avith a 

 small admixture of Orhitolites and Pohjtrema. Lithothamnion is present, encrusting 

 corals, and so are detached joints of Hulimeda ; also echinid spines and casts of 

 gasti'opods. The samples of powdered rock from 448 feet are generally fine, they 

 contain pieces oi' Pocillopora and perforate corals, with Amphistcjjina. 



Details. 



(214). From 430 to 433 feet. Length 40 millims. An irregulur lump of hard whitish rock, porous and 

 cavernous, mainly composed of casts of Serialo/iom with Amjihi.ifc'/iiKt and empty ca.sts of gastropods, 

 Echinid spines. 



(215). Length 110 millims. by -o.o millims. in dianietci'. Cylindrical core of whitish grey rock, porous. 

 Mainly foraminiferal with fine sediment, cemented hy calcite. No corals recognised. A microscopic 

 section [655] shows that the predominant form is Calraiina hixpida, with some Oiiiitolitc^, and I'uhjiirina 

 planum. Haliim'<hi joints, common ; Lifhothamnwn in small fragments. 



(216). Length 88 millims. Cylindrical core of haid whitish-grey rock, minutely porous, consisting of 

 foraminifera and I{n}i)n''Ja, like preceding ; also cast of a piece of Scriatopoiv.. 



(217). Length 85 millims. Core cylindrical, rock cavernous with branching Srriaiopom and Madnjma, 

 the coral casts are encrusted by Lifhofhamnion. CaJrarinc, and Orhitolites. 



(218, 219). Two small cylindrical cores with a total length of 50 millims. Whitish-grey rock, like 

 preceding, of casts of Suriaiopora and encrusting LiOuAliamnion. The parasitic liorings in the corals now 

 appear as irregular anastomosing calcareous networks in the cavities from which the coral structures have 

 been dissolved out. 



(220, 221, 222). Thiee rubl>ly fragments of rock similar to the preceding with casts of Scriof'iponi and 

 Madrppom, and also foraminifera. 



From 4'18 to 450 feefc. Sample of broken-up fragmental and powdered material, mostly of small 

 angular chips of greyish rock. A few casts of PoriUopom and perforate corals and rarely Calcarina, and 

 echinid spines can be distinguished with a lens. 



Depth from Surface, 450-457 feet; Distance Bored, 7 feet; Total Length of Core 

 Obtained, 1 foot 5 inches; Numbers of Cores, 223-229. 



From the upper 3 feet of this part of the boring, between 450 and 453 feet, there 

 are solid cylindrical cores with a total length of 1 foot 5 inches ; the remaining 4 feet 

 being only repre.sented by loose angular chips and powdered rock, broken up by the 

 drill. The solid cores are of whitish, moderately hard, porous, and in part, cavernous 



