238 DR. G. J. HINDE. 



Depth from Surface, 706-716 feet ; Distcmee Bored, 10 feet ; Total Length of Core 

 Obtained, 1 foot ; Nmnhers of Co7x\s, 3a-8a. 



Cores cylindrical, with one exception, of whitish, soft, minutely porous, crystalline 

 dolomitic limestone. Not soft enough to be scratched by finger nail, but yields readily 

 to a knife. Like the preceding the cores mainly consist of foraminifera and Halimeda 

 in a fine amorphous sediment, now cemented by crystals of dolomite. Only a single 

 specimen of Madrepora noted. Am2>histegina, Polytreina and Cycloclypeus are the 

 most prominent foraminifera. The organisms are very poorly preserved. 



Details. 



(3a). Length 30 niillims. A friigmeiit of core rounded by drill, .iiiijihisfcgina is the only form 

 distinguishable with u lens. 



(•iA) [682]. Length 98 millims. "Whitish, fine-grained, minutely porous, dolomite. A microscopic 

 section shows that the greater part of the core consists of daik, amorphous sediment, cemented by small 

 rhombohedral crystals of dolomite. A single piece of Madicjwa and of another perforate coral, encrusted 

 hy Pulijtrcina plunuiii ; ^liiiphidct/irui, and Hek'iudcginu. Scqjiihi. J lul imrda jomts. 



(5a, 6a). Total length 52 millims. Two cylindrical cores of similar rock to the preceding. No corals 

 noted. (Same foi'aminifera as before, with the addition of Ci/i'Im-li/prits. llaliiiifdd. 



(7a). Length 50 millims. The same white, porous rock as the jJ'uceding. ]NJainly of foraminifera : 

 Ainjihisteiji/Ki, Hi'tcrosfcijina, J'alijtiTiiia, and Ci/rludi/itctis. A few joints of Halinn'ila. 



(8a) [683]. Length 66 millims. Whitish, fine-grained, minutely porous dolomite, with the same 

 foraminifera as the preceding, embedded in a fine amorphous sediment. Echinid spines. Haliineda. 



Depth from Surface, 7 16-7 SG feet ; Di.^itauce Bored, 20 feet ; Total Loigth of Core 

 Obtained, 2 feet 4 inches; Numbers of Cores, 9A-lfiA. 



Cores cylindrical, of whitish, soft, porous, finely crystalline dolomitic limestone, 



similar to preceding. The rock is sometimes sufficiently soft to be marked by the 



finger nail. It essentially consists of foraminifera and Halimeda ; corals are rare ; 



one piece of an Astrsean, one of Madrepora, and several casts of a small fungid, 



probably Cycloseris, are all that have been noted. Of the foraminifera, Pohjtrema 



planum is largely developed, forming prominent nodular lumps, some reaching to 



38 millims. in diameter, encrusting Halimeda and other organisms. Amphistegina 



numerous. Cycloclypeus still occurs. Alveolina noted definitely for the fii'st time in 



No. 13a, about 725 feet. In the cores from the lower part the foraminifera and 



other organisms are better preserved, and the fine amorphous material no longer 



prevails. 



Details. 



(9a). Length 43 millims. Whitish, soft, scratched by nail. Hctcrodvgina, CyducJijpcus. Cast of 

 Cycloserist 



(10a). Length 86 millims., diameter 56 millims. Whitish, soft, like preceding, light, and very 



porous. A piece of an Astra-an coral cast, and the cast of a small Ci/clc-rris (1). The core mainly 



