REPORT ON MATERTAI.S FROM THE RORTNCS AT FUNAFTTTT ATOT.L. 293 



corals, or molluscan shells. Tlie ujjper cores are generally very similar to those 

 described above ; the rock is very crystalliDe, and the organisms — both corals and 

 foraminifera — are nearly obUterated. In the lower 5 feet of" this part of the boring 

 corals are more numerous, but still in bad condition. The genera present are 

 Stylojjhora, Pocillo-poixi, CcpJoria, Orhicella, AstrcBa, Fnm/ia, Madre/pora, Porites, 

 and other perforates. MiUepora, alcyonarian spicules. Foraminifera and fragmental 

 material form the larger mass of the rock in the higher cores, while in some of the 

 lower they are subordinate to the corals. The following have been recognised : 

 Miliolina, Orbitolites, Textularia, Plano7'bulvna, Carpenteria, Calcarina, Gyp^ina, 

 Polytrema, Amphistegina, and Heterostegina. Echinid spines. Se^pula-tuhes. 

 Casts of gastropods and lamellibranchs. Halimeda (not common), Litliothamnion. 



Details, 



(662a-664a). Total length .346 millims. Greyish-brown, dense, dolomitic limestone, with occasional 

 hollows. Organic structures largely obliterated ; the only forms recognisable with a lens are Amplmtegina, 

 Polytrema, echinid spines, and fragments of Lithothamnion. 



(665a) [824]. Length 196 millims. Greyish-bi'own, compact to porous. Organisms very indistinct, 

 apparently almost entirely foraminifera and fragmental dihris ; only a small branching Madrepma shown 

 in the section, together with Orbitolites, Textularia rugosa, Calcarina, Gypsina inhcerens, Amjyhistegina, echinid 

 spines, and casts of lamellibranchs. Halimeda, fragments of Lithothamnion. 



(666a-667a). Total length 246 millims. Rock like the preceding. Specimens of OrUcella i^^eiades 

 throughout the cores. Orbitolites, Amphistegina (numerous). Echinid spines, casts of lamellibranchs, and 

 fragments of Lithothamnion. 



(668a). Length 228 millims. Speckled, greyish-brown, hard, porous. The only remains of corals 

 recognised are casts of a small perforate, the core principally consists of Orbitolites, Polytrema jj/a«w/7i, 

 Amphistegina, echinid spines ; casts of lamellibranchs and Lithothaiimion. 



(669a, 670a). Length 140 millims. Rock similar to preceding. The only organisms determinable are 

 Orbitolites, Amphistegina, and echinid spines, together with casts of lamellibranchs. 



(671a, 672a). Total length 275 millims. Greyish-brown, porous and cavernous, the hollows due to the 

 removal of corals and lamellibranch shells. Casts of Astrcea, Fungia, and Porites (1) ; probably more than 

 half the cores of corals originally. Orbitolites, Polytrema miniaceum, P. planum, Amphistegina, and 

 Heterostegina. Echinid spines. 



(673a, 674a). Total length 137 millims. Rock similar to preceding. The large hollows due to corals, 

 which are now too far replaced for determination. Ainphistegina, echinid spines. Casts of lamellibranchs. 



(675a) [825]. Length 87 millims. Greyish-brown, minutely porous, some hollows. Cast of perforate 

 coral. Alcyonarian spicules. The core is almost entirely composed of foraminifera and detiital materials. 

 The microscopic section shows the following forms, determined by ]\Ir. Chapman : Miliolina, Orbitolites, 

 Textularia, Globigerina, Carpenteria, Calcarina, Gypsina inhcerens, Polytrema planum, Amp>histegina, and 

 Heterostegina. Echinid spines. Halimeda-joints somewhat rare. Lithothavvnion. 



(676a). Length 401 millims. Greyish-brown, porous to compact, with occasional small hollows. Casts 

 of Pocillopjora, simple cylindrical Astraean, Madrepora contecta (?), and perforate corals, which are too much 

 altered for determination. The larger part of the core consists of foraminifera and fragmental organic 

 materials. Gypsina, Polytrema planum, Amphistegina Lessonii very numerous. Echinid spines. Casts of 

 gastropods. Lithothamnion. 



(677a) [826]. Length 235 millims. Speckled, greyish-brown, compact to porous, with occasional 

 hollows. Core chiefly consists of coral casts, for the most part now solidly infilled with crystalline 



