282 DR. a J. HINDE. 



Depth from Surface, 643-652 feet; Distance Boiled, 9 feet: Total Length of Core 

 Ohtained, '^ feet 5 inches; Numbers of Cores, 321-335. 



The cores from this 9 feet of the boring are mostly cyHiidrical, of a hard, whitish- 

 grey, sometimes with a mottled appearance, porous, and occasionally cavernous 

 dolomitic limestone. The rock is very crystalline, the pores are lined with rhombo- 

 hedral crystals, and the foraminifera and other objects are encrusted with the same 

 sparkling crystals. These cores exhibit the same general characters as the preceding 

 from No. 314 (638 feet) downwards, but they contain more corals, and a less 

 proportion of foraminifera and fragmental materials. The corals are in very poor 

 preservation, only represented by imperfect casts, not infrequently showing only the 

 infilled borings of Clioiia and other organisms ; as a rule, the casts are now infilled 

 with crystalline dolomite, whilst the original interstices and the Cliona borings are 

 filled with fine organic detritus. The corals include Pocillopora, Stylophora, small 

 Astrgeans, Madrepora, Porites, and Astrcbopora ; also a single example of Millepora. 

 They are usually surrounded by a thick Avhite layer of Polytrema pJanam, with some 

 Lithothamnion. The spaces between the corals are filled with the usual kinds of 

 foraminifera, echinid spines, and ILdimeda. The foramini feral structure is altered, 

 and partially obliterated in this rock. 



Details. 



(.'521, 322). Total length 160 niillinis. Two cylindricJil cores of mottled, gre3'ish-white, dolomitic rock, 

 hard, porous, with some cavities. Several casts of corals, now replaced so that identification is impossible ; 

 there are traces of PoriJloponi and of perforate corals. But little shown of the fragmental part of the core 

 beyond Hctn-oxfciiina and echinid s])ines. 



(323). Length 43 millims. An iri'egnlar piece of white I'ock, with casts of the surface of a l)ranching 

 I'lirtUopora and a Madrepora. 



(324). Length 88 millims. Coie cylindrical, of hard, greyish-white, porous dolomite. Several casts of 

 perforate corals {I'oriti's ?), mostly fdled up In' crystalline materials. I'lih/fmna phiiniut, forming small 

 nodules. Hcfcnixfcgina ; echinid spines. 



(325). Length 74 millims. Core cylindrical. Several corals present as casts. Millepora, Sliiloplmra, 

 Madrepora and others not determinal)le. The corals surrounded !)}• layeis of Lifholhaiiruion and Poli/frema 

 planum. Foraminiferal structure obscured and partly obliterated [547, 548]. Tnmraffilmu, Carpenferia, 

 Polyirema vnniacemii, Gijp.4na, Awpthisfegina, Hefero.<feffma. Echinid spines abundant. Section of 

 crustacean carapace. Haliii)ei/a-io\nts. 



(326). Length 63 millims. Cylindrical core, whitish-grey, poroxis, and with some cavities. Casts 

 of Madrepara and I'orites encrusted by layers of Litliothainnidn. and roli/frema. Clv/na borings. Lui'ge 

 spines of echinids. Foraminifera not recognisable with a lens. 



(327). Length 77 millims. Cylindrical. Larger part of cores of casts of Madrepemi and Parite.'^, 

 overgrown Ijy Lithidhainnion and J'oli/frcnm. 



(328). Length 98 millims. Cylindrical. Greyish-white, mottled, hard, porous dolomitic rock, with 

 '^ few cavities. Many solidly infilled casts of Madrepara, PoriteK, and other corals not determinable. 

 Encrusted similarly to the preceding. Coral interstices filled with fine detrital mud. The areas between 

 the corals likewise filled in with fine fragmental materials [678, 679], containing Miliolina, Pidmiiulina, 

 Car/If itti-r id, t'oltjlrfina iid/uaceuiii, P. planum, Adtphisteyina, and Heterusfegiiia. Echinid spines numerous, 



