286 . DR. G. J. HINDE. 



Depth from Sivrface, 1 034-1 044|^ /eef ; Distance Bored, 10^ feet ; Total Length of Core 

 Obtained, 10 feet 5 inches ; Numbers of Cores, 583Ao-r)94A. 



Solid cylindrical cores of greyish to greyish-brown, hard, dolomitic limestone. The 

 rock varies from compact to minutely porous, with occasional hollows. Casts of 

 corals are generally present, in some cores they predominate, while in others tlie rock 

 consists chiefly of small organic fragmentary materials with foraminifera. The corals 

 for the most part belong to the same genera as in the preceding cores : Stylophora, 

 PociUopora,, Seriatopora, AstrcBa, Ccdoria, OrbiceUa, Ma(lrep07Xi, and Porites ; also 

 MiUep>ora and alcyonarian spicules. The foraminifera comprise Milwhna, Or'lntoliies, 

 Textidaria, Calcarina, Gypsina, Polytrema, AmpJiistegi7}a, Ilete7'ostegin a, and, ravuly, 

 Cycloclypeus. Echinid spines. Casts of gastropods and lamellibranchs, including 

 Lithodomns ; Halimeda, and LitJiothamnion. Borings of Cliona. 



Details. 



(.583Ao). Length 14;5 millims. Greyish-browii, niiimtel}' porous, with irregular hollows. Casts of 

 Pocillopwa, Jdrcra, and Porita^ arenosa. Larger part of coi-e of fragmental material, with Orhitolites and 

 Awphi.ffcr/ina. Echim'd spines. Casts of laraellibninchs. Li f h of h amnion. 



(58-tA) [811]. Length ;334 millims. (Tre3dsh, hard, minutely porous, with a few hollows. Coral c;ists 

 small generally ; they belong to rorlllo/mra, Seriatopora, Adra>a, Orhicella plciaili's, Madrepora, and Porites. 

 Millqwra. Alcyonarian spicules. The larger part of the core consists of somewhat coarse fragmental 

 materials, with Orhitolites romphinula, Terfularia, Gijpdna inJiarens, Poliftretna, Ainphidegina, Heterostegina, 

 and ('//rIorli/peKs (worn specimen seen in the microscopic section). Echinid spines. Casts of gastiopods 

 and lamellibranchs. Litliolhanniion. The interspaces between the fragments only partially filled with 

 the crystalline dolomitic matrix. 



(585a). Length 722 millims. Greyish to greyish-brown, speckled, hard, minutely porous. The core 

 has been divided transversely into five pieces of about equal length. The rock is practically of the same 

 character throughout; it is very largely of somewhat coarse fragmental materials, with foraminifera 

 and casts of small corals, not occupying much space. They belong to Sti/lojiliora, Pocillopoixi, Seriatopora, 

 Calmia, and Porites. MiUcjiora. The foraminifera include Orhitolites, Gi/psina, Poli/ireina, Aiiipldstegina 

 and Heterostegina. Echinid spines. Casts of shells and Lifliothaiiinion in small fragments. 



(586a). Length 140 millims. (Treyish-brown, minutely porous, and cavernous. Rock mainly of coral 

 casts. Sti/lophora, I'orillojiora, Orhierila, I'oli/fn'/nn, Aiirpliisfcgiva, and Uctnodcglna. Casts of lamellibranchs, 

 Lifholliiiiitnion. 



(587a). Length 286 millims. (4reyish-brown, miiuxtely porous, and with irregular hollows. The 

 upper half of this core is mainly of casts of Orbirclla, with some Seriatopora, while the lower part is chiefly 

 fragmental, with the same foraminifera and other organic remains as in the core above. 



(588a). Length 172 millims. (ireyish-brown, minutely porous, with irregular hollows. Largely 

 of coral casts, some hollow, others solidly infilled with crystalline dolomite. The corals belong to 

 Stylophora, Pocillopwa, Urhicctla pleiailcs, and Cwloria. Orhitolites. Casts of lamellibranchs. Lifliofhaiunion. 



(589a). Length 90 millims. Greyish-brown, porous to compact, large hollow where coral has been 

 in part removed. Core principally consists of casts of Pocillqjora and ('(rlmia. Alcyonarian spicules. 

 Echinid spines. Orhitolites. Cliona borings. 



(590a) [812]. Length 377 millims. Greyish, speckled, fine-grained, minutely porous to compact. With 

 the exception of casts of Pocillopwa and Orhicella plciadcs in the upper part, the core is nearly altogether of 

 fine fragmental mateiials, with foraminifera, alcyonaiian spicules, echinid .spines, casts of gastropods 



