298 DR. G. J. HINDE. 



Of the loose material or " sand," which is such an important constituent of this 

 boring, there were samples taken at no great depth from the surface and also near the 

 bottom of the Ijoring, at 90 feet. These consisted principally of foraminifera, which 

 in the sample from near the surface a})])ear to l)e essentially tlie same forms as 

 those of the beach, and may have been in part derived from the beach. From the 

 other sample, and in the sedimentary materials associated with the solid cores, the 

 following genera of foraminifera were determined by Mr. Chapman : Nvbecidarin, 

 Miliolina, Orhitolites, Placopsiliua, lladdonia, Tcxtidaria, Verneuilina, Discorhina, 

 Planorhulina, Truncatulina, Carpenteria, Pulvinnlina, Calcarina, Aniphistegina and 

 Heterostegina. 



Other organisms in the incoherent materials include detached spicules of 

 calcisponges, echinid spines, a single small Cidaris, Serpida tubes, Spirorhis, stellate 

 Leptochnuni spicules, Cheilostomatous polyzoa, small gastropods belonging to 

 Ringicula and Diala; Lithodonms, Halimeda joints and small coprolitic pellets. 



Depth from Surface, 0-SO feet ; Distance Bored, SO feet ; Total Length of Core 

 Obtained, 8 inches; Numbers of Cores, C. 1-C. 5,. 



The solid rock-cores fi'om this part of the boring consist of irregular fragments of 

 cream-coloured, whitish, and dirty greenish limestone, hard, porous, and in places 

 very cavernous. There is also a sample of loose, powdery material, chiefly of 

 foraminifera, from no great depth from the surface, but as these are of the same 

 character as the beach deposits of the locality, and probably are, to some extent, 

 derived from them, I have not included them as part of the core material. 



The rock-cores are mainly composed of Heliopora cmrulca, Orbicella, and branching 

 Lithothamnion. The hollows between the corals and calcareous algae are partly filled 

 with foraminifera and sedimentary materials, either unconsolidated or cemented with 

 fibrous crystals of " conchite," or aragonite. The foraminifera belong to Nubecularia, 

 Miliolina, Grbitolites, Placopsilina, Haddonia, Carpenteria, Gypsina inhcerens, 

 Polytrema planum, and Ampjhistegina Lessonii. Other organic remains are echinid 

 spines, Serjivla-tuhe^, Cheilostomatous polyzoa, diminutive gastropods, determined by 

 Mr. Edgar Smith to belong to Riyigicida and Diala, detached stellate spicules of 

 Leptoclinum, joints of Halimeda and small coprolitic pellets. 



Details. 



(C. 1). Length 45 millims., width 75 millims. An irregular, cavernous nodule of whitish-grey limestone, 

 hard, consisting principally of JMiopora, OrhiceUa, and branching LitJiofhamnion. Echinid spines, Seqjula, 

 polyzoa, small gastropods, joints of Hcdiineda. 



(C. 2). Length 35 millims., width 75 millims. Partly cylindi-ical, greyish, hard limestone; cavernous. 

 HeliajMiu, with nodular and branching Litltofliuiimion. Li places, powdery material, M'ith Grbitolites and 

 AmpJiideijinu. Poli/frctint, jilanmn. Echinid spines, Seij/iila, gastropods, and Ihdiincda. 



(C. 3). Length .35 millims., width 68 millims. An irregulai" fi'agment, partly greyish-white, jmrtly 



