228 DR. G. J. HIXDE. 



larger, ranging to (5 millims. in diameter, and there are amongst them casts of 

 Pocillopora and perforate corals, somewhat large foraminifera, and casts of small 

 gastropods. The pieces of solid cores contain casts of a small Astrcea, Madrepora, 

 and numerous foraminifera in a fine consolidated and now somewhat altered sediment. 

 Amongst the foraminifera, Cyclochipeus was recognised for the first time in the boring. 

 The rock is cemented l)y calcite. 



Details. 



(296fl.) [670]. Length 22 millims. An irregular piece of greyish-white, cavernous and porous rock, 

 with casts of a small .4drira and Muilrcpom. Foraminifera numei'ous, belonging to Tcxftdaria, Trtmcabtlina, 

 Glohigerina, Plartorhvlina, PoJijfrerna Diiniarnni), P. planujii, Jmphhtcgina, large and numerous, Hetcrostegina 

 and Cj/dodi/pois. Haliiiir/Ja joints, indistinct echiiiid spines. 



(296?)) [671]. Length 30 millims. A fragment of cream-tinted rock, porous, with indistinct casts of 

 corals and numerous , foraminifera. Carpenfcria, Pobjtreina, Ainplmtegina, Heterostcgina and Ci/chcli/peus. 

 Echinid spines. 



Coarse fragments of broken-up greyish-white rock, with casts of Poi'tJhpora, Jstra'a, perforate 

 corals, and OrhifoJifes, AinpJnsd'fjhui. aTid H/'tnvslcffina. 



Depth from Sin- face, 578- -598 feet ; Distance Bored, 20 feet ; Total Leiigth of Core 

 Obtained, 10 inches; Numbers of Cores, 297-304. 



The solid cores consist of several irregular fragments and three cylindrical cores of 

 a greyish-Avhite, moderately hard and very porous limestone, in which there are 

 a few obscure casts of corals, apparently oi' Madrepore t, and a comjDound fungid coral. 

 The greater portion of the cores seems to consist of foraminifera, with alcyonarian 

 spicules and casts of small gastropods. The incoherent materials, brought to the 

 surface by tlie sand-])ump, are fine and moderately coarse chips of a rock similar to 

 that of the solid cores; the only organisms seen with a lens are foraminifera, broken 

 echinid spines, and very rarely a small piece of a cast of coral. Professor David 

 considers that these represent cuttings through fine coral rubble. 



Details. 



(297-301). Five iriegular pieces of white porous rock, length altogether 126 millims. Cast of fungid 

 coral. The rock appears to be mainly of sedimentary material with (.'i/rlorli/jjcn:^, jliiiphisfcfiiva, and 

 Hdinvstefjina, 



(302). Length 36 millims. Core, cylindrical, of whitish-grey limestone, with numerous jjores and small 

 hollows. Only organisms to be seen with a lens are Amphidegina and casts of small gastropods. 



(303). Length 23 millims. Cylindi'ical cores, similar to preceding. Cast of Astraean coral. Alcyonarian 

 spicules. AiDpldsfi'ginu. 



(304). Length 74 millims. Core, cylindrical; of whitish-grey, porous rock, similar to the two preceding 

 specimens. Cast of Mitdrcpora, apparently in position of growth, also of anothei" coral supposed by 

 Professor David to be Ilcliopora rrenilm, but I caiuiot recognise it with certainty. 



Microscopic sections [537, 538] show that the limestone is mainly of Hue fragmental materials witli 

 numerous forann'nifera belonging to Milioliim, Dhcwhina, (lluhigevina, Bulmna, (Jarpenteria, Polgfreiiia jildiumi, 

 Valmnna, J ni/i/iis/ri/lnit, vcvy n\)nnd;a\t, flrfrnixfrglna -Am] C'/fiJorli/p/'i/s, Alcyonarian spicules. Polyzoa. 



