REPORT ON MATERIALS FROM THE RORTNOS AT FUNAFUTI ATOLL. 207 



Pocillopova, and Madrc2)ora. PociUopora is very abundant, it foinis the main 

 constituent throngh several consecutive cores vi^ith a total length of 1 6 inches, and is 

 apparently in the position of growth. The coral has the minute structure preserved, 

 the interspaces are either empty or lined with prismatic crystals of " conchite," or 

 partly with calcite and fine sediment. The corals are frequently encrusted by 

 Polytrema planum. Lithothamnion is also present. Amphistegina Lessonii is very 

 abundant, Tinoporus haculatus, and Carpenieria. A sample of loose material from 

 the lower portion of this part of the core contains angular fragments of hard rock 

 with some foraminifera, echinid spines, &c. 



Details. 



(121). Length 144 millims. Massive cylindrical core 80 millims. in diameter, consisting of a thick 

 layer of Madrepora sp., with branching Pocillopom and Millepora. Between the corals fragmental materials 

 with OrbitoUtes, Amphistegina, purple echinid spines, Serpula, Lithothamnion. 



(122). Length 80 millims. Cylindrical core generally similar to preceding, of Pocillopom and 

 Madrepmxi, with a considerable amount of cemented fragmental and foraminiferal rock, Amphistegina, 

 Lithothamnion. 



(123) [632]. Length 100 millims. Cylindrical core with Millepora, PociUopora and Madrepova. The 

 minute structure of the PociUopora shown in thin section ; the borings in the coral mostly infilled with 

 granular mud containing stellate ascidian spicules; the coral is partly overgrown with a thick layer 

 of Polytrema planum.. Other foraminifera present are Amphistegina, Tinoporus and Carpenteria. Echinid 

 spines. 



(124) [633]. Length 70 millims. Cylindrical core, of hard, compact to porous, rock, principally of 

 Pocillojjora with a piece of Madrepiora contecta. In fragmental mud same foraminifera as in No. 123. 

 Gastropod shell. 



(125). Length 75 millims. Hard, somewhat porous limestone, due to the empty interstices of the 

 corals. Largely of PociUopora, with some Millepora and Madrepora. Amphistegina, echinid spines, 

 Lithothamnion. 



(126). Length 50 millims. Cylindrical core, principally of Pocillopwa in fragmental material, with 

 Amphistegina and Tinoporus baculatus. 



(127). Length 70 millims. Cylindrical core, like the preceding, mainly of PociUopora, also with a piece 

 of branching Madrepora. Consolidated detrital mud with OrbitoUtes and Amphistegina. 



(128). Length 100 millims. Cylindrical core, cavernous on outer surface where imperfectly cemented, 

 fragmental materials having been washed away. Principally of PociUopora, apparently belonging to the 

 same species as that in the preceding cores, 121-127. Fragmental materials with Amp)histegina, echinid 

 spines, Serpula, gastropod shell, Lithothamnion, encrusting ; also in thick laminse. 



(129). Sample of finely ground-up materials, mainly of angular chips of rock, with a few foraminifera 

 principally Amphistegina Lessonii ; Spirolocidina grata, one specimen, determined by Mr. Chapman. Small 

 gastropod, echinid spines. 



JDeiM from Surface, 130-140 feet; Distance Bored, 10 feet; Total Length of Core 

 Obtained, 1 foot ; Numbers of Cores, 130-134. 



Two pieces of cylindrical cores and four fragments, with a total length of 1 foot, 

 represent the solid cores from this 10 feet of the boring. The cores are of hard 



