294 DR. Ct. J. HINDE. 



dolomite. Focillojjoja, OrhiccUa j}hiadc>>, Maihrpora^ and other peifoiate corals. MillejJam, OibitoHte», 

 Texhdaria, Flanai-hulina, Carpenteria, Gi/paina inhcereng, Folytreina planum, AmpMstegina very conimou, and 

 Heterodecjina. Echiiiid spines and plates. Casts of lamellibranchs. Halimeda-jomta. Areas of fine 

 organic sediment shown in microscopic section, with stellates of Leptodinuin (?). 



(G78a). Length 718 millims., divided transversely into five pieces, marked 1-5. Core greyish to 

 greyish-brown, speckled, hard, compact to minutely porous, some small hollows, and in the lower cores 

 (4-5) larger cavities, where corals have been dissolved away. The pores and holloAvs are lined with 

 banded crystalline dolomite. Corals are present throughout the core, and in places they form the chief 

 part of it. They belong to Stjilophom, PoriUopam, Ccelmia, simple Astr.iean, Madrepwa, Pmitea, and other 

 perforate forms. Millepora. The corals are usually overgrown by Polyireiiia planum and hy Lithothainnion. 

 The only foraminifera recognisable by the lens are OrbifoHtcs and Ainphistegina. Echinid spines. Casts of 

 gastropods. HaUineda (1). 



(679a). Length 282 millims. Rock similar to the preceding. The core largely consists of casts of 

 corals, now for the most part infilled with the crystalline matrix, and very indistinct. They chiefly 

 belong to Sti/Iophom and Faiifes, with occasionally Madnpura. The corals are encrusted by Litlwfhamnion 

 and Polytrema. Ainphistegina. 



(680a, 681a) [827]. Total length 214 millims. Greyish to greyish-brown, mottled, compact to porous, 

 occasional hollo w.s. Cores chiefly of corals. Stylophora, ('idoria, bored by Lithodomux, and Pontes. The 

 corals encrusted with thick layers of PolytreiiM planum. Alcyonarian spicules. Li the detrital mud 

 surrounding the coral casts there are Orhitolile^, I'ltnutrhiilina Jarmfa, Carpenferia, Gypsina discvs, and 

 Aiiiphixtcginu. Echinid sjiines. Clioiui borings. 



(682a) [828]. Length 160 millims. Greyish-brown, compact to porous, with several hollows. Core 

 largely of corals. Cwloria and Purites. Millepma. Alcyonarian spicules. Encrusting Polytrema and 

 LitliotJiaiiinimi. Calraiina, Aiiiphhtegina. The interspaces of ('(I'lorin filled with fine sedimentary material 

 eontaining LeptocHnuin stellates. Cliona borings. 



Depth from Su7[f ace, 1100-1114^ /w^; Distance Bored, 14^ feet; Total Length of 

 Core Obtained, 12 feet 10 inches; Numbers of Cores, 683a-709a. 



Solid cylindrical cores of whitish, greyish-white, to greyish -brown, hard, dolomitic 

 limestone, compact to porous, cavernous in places, occasionally efflorescent. The 

 cores consist largely of corals to the horizon of 1109 feet, where there is a change; 

 the rock becomes whitish, more porous, and it is mainly composed of foraminifera, 

 with only small corals here and there. This continues to nearly the bottom of the 

 boring, with exceptional portions where corals are more numerous. The preponderating 

 corals are of the family Astrcbidct, belonging to Cceloria, Astrcea, and Orhicella. 

 Other forms present are Stylophora, Pocillopon'a, Cijphastrcea, Fungid, genus uncer- 

 tain ; Madrepora, Forites, and a perforate coral, of uncertain affinity. Millepora is 

 not uncommon, and occurs in position of growth in the lower cores ; also Lobophyttim 

 and alcyonarian spicules. The foraminifera include Miliolina, Orbitolites, Textularia, 

 (rlobigerina, Planorbulina, Carpenteyia, Calcarina, Gypsina, Polyt7'ema, Ainphi- 

 stegina, and Heterostegina. There are also echinid spines, Serpula-iwhQii, casts of 

 lamellibranchs and gastropods, Cliona borings, and Lithothamnion. 



Details. 



[683a 684a]. Total length 3-55 millims. Greyish to greyish-brown, mottled, compact to minutely 



