252 DR. G. J. HINDE. 



is abundant. Alcjonarian spicules, echinid spines, and joints of Halimeda are 

 included in the fragmental detritus. 



Details. 



(145a, 1-16a). Total length 174 millims. Greyish-white, hard dolomite, with several cavities. 

 Casts of Forilhpom, Madrepora, Pmites (?) or Monfiporo, overgrown by Pohjfrema planviii and Liflio- 

 fhamnion. Infilled casts of Cliona. Ainphistq/ina. Casts of lamellibranchs. 



(147a). Length 130 millims. Mottled, greyish-white, hard rock, very cavernous. Casts of Focillopom 

 and Madrepora, for the most part solidly infilled and replaced by the dolomitie matrix ; the PocilJipora, 

 however, is more often dissolved away, leaving only a mould of the calices. Amphidegina. 



(148a). Total length 243 millims. Whitish-grey, hard, compact to porous, and very cavernous. Casts 

 of PorUJopoiv and Madrepora in the same condition as in the preceding. Very little to be seen under a lens 

 in the areas not occupied by corals. The infilled casts of Cliona, very well shown. 



(149a) [727]. Length 177 millims. Grey, mottled, hard, with numerous cavities. Casts of Porillopora 

 ajid Madrepora, which are encrusted with layers of Poli/frciint plannin and Lifhothat anion. Interstices of the 

 corals infilled with consolidated sediment. Carpenferia, Cnlrarina, P. ininiacevm, and Amplmtegina. 

 Alcyonarian spicules. Echinid spines. In the detrital material, fragments of Lithothainnion and Halimeda, 

 and pieces of organisms now replaced by crystalline dolomite. 



(150a 151a) [728]. Total length 190 millims. Mottled, greyish-white, hard, jwrous in places, and very 

 caveinous. Cores mainly of casts of Porillopora, with thick, white, undulating layers of Lithothainnion. 

 Giipdna inhwrens. 



(152a, 153a, 154a). Total length 120 millims. Rock of .same character as preceding. Mainly of 

 Porillopora and thick undulating layers of Lithothamnion. In 154a a cast of a small OrhiceUa{1), cf. 0. orion, 

 Dana. 



(155a, 156a). Total length 190 millims. Greyish, hard, partly compact, partly porous, with large 

 cavities. Casts of Porillopora and Madrepora. In the greater part of these cores the organic remains are 

 either quite obliterated or replaced by crystalline dolomite, in which only whitish grains can be seen with 

 a lens. 



Depth from Surface, SOA-SiO feet ; Distance Bored 6 feel : Toted Length of Core 

 Obtained, 5 feet I inch; Numbers of Cores, 157a-174a. 



Cores cylindrical, of Avhitish, whitish-grey, partly mottled, d(jiomitic limestone ; 

 hard (H = 4), partly compact, partly porous, in places cavernous, but not nearly to 

 the same extent as in the cores preceding. The cores on the whole are principally of 

 casts of corals, apparently in position of growth : they are badly preserved, and 

 usually enclosed by growths of Polytrema plmiuin and Lithothamnion. The corals 

 include Pocillojwra, Senatopora, Ceeloria, Astrsean not determined, Madrepora, 

 TurbinariTt, Montipora, and Astrceopora. The areas between the corals are filled 

 with fragmental materials ; amongst these are foraminifera, alcyonarian spicules, 

 echinid spines, casts of Gastropods, Serpula, Halimeda, and in the finer sediment 

 the minute stellate spicules of Ijeptoclinum can be recognised. The organisms are 

 cemented by crystalline dolomite. 



Details. 



(157a). Length 91 millims. Whitish-grey, porous, hard dolomite, with small cavities. The core is 

 traversed by a branching Pocillopoiv, apparently in position of growth. The corallites are either solid or 



