REPORT ON MATERIALS FROM THE BORINGS AT FUNAFUTI ATOLL. 271 



Casts of Pocillopora, Astrma, Pontes arenosa, and other small corals not determinable. Orhitolites, Carpenteria, 

 Polytrema. Echinid spines, gastropod casts. 



(370a). Length 121 millims. Whitish, hard, partly porous, with large hollows where gastropods have 

 been dissolved out. A few small coral casts, including ]\[adre]j(yra ; the core is principally of detrital 

 materials with the same foraminifera as in the preceding, and a considerable amount of branching 

 Lithothamnion. 



(371a, 372a) [781]. Total length 170 millims. Greyish-white, speckled, hard, mostly compact, with 

 some large hollows. Casts of small examples of Madrcpora and Pontes. The detrital portion of the 

 cores contains Orhitolites, Carpenteria, Calcanna, Gi/psina, Polytrema and Heterostegina. Echinid spines, 

 alcyonariau spicules, Leptoclinuin stellates, and Litliotl/amnion. Cliona l)orings. 



(373a) [593, 594]. Length 116 millims. Greyish-white, hard, comjjact, with porous areas. Mainly 

 of corals; casts of Cceloria, Hydnophoru, Orbirella, Madrepaixi conteda C?) and Montipm-a (1). Lobophytum. 

 Corals overgrown by Lithothamnion. Orhitolites, Calcarina, Gypsina, Heterostegina rwA Amphistfgina. Echinid 

 spines. 



(374a-376a) [782]. Total length 259 millims. Grey to greyish-white, hard, in part compact, in part 

 porous, with occasional hollows. A single specimen of Porites arenosa extends nearly the entire length 

 of these cores ; it is apparently in the position of growth, and is now solidly infilled with crystal- 

 line dolomite. Besides the Porites, there are casts of Madrepora and Montipoiu, alcyonarian spicules, 

 Orhitolites, Polytrema, Amphistegina. Echinid spines, Lithothamnion. Casts of gastropods. Infilled Cliona 

 borings. 



Deptli from Surface, 922-936 feet; Distance Bored, 14 feet; Total Length of Core 

 Obtained, 13 feet 9 inches ; Numhers of Cores, 377a-404a. 



Solid cylindrical cores of whitish, grey, and greyish-white, hard, dolomitic lime- 

 stone. In part compact, in part porous, with occasional hollows, where corals and 

 moUuscan shells have heen removed. Corals are of general occurrence throughout, 

 but in the lower cores they are of small dimensions, and the rock chiefly consists of 

 minute organic detrital materials with foraminifera and a large amount of branching 

 Lithothamni07i. The corals include Pocillopora, Astrcea, and other Astrsean corals, 

 Madrepora, Porites, very abundant, and Montipora. Also Millepora, Lobophytum, 

 and detached alcyonarian spicules. The foraminifera belong to Miliolina, Orbitoliies, 

 Haddonia, Textularia, Globigerina, PlanorbuUna, Carpenteria, Polytrema, 

 Amphistegina and Heterostegina. There are also in the detrital materials echinid 

 spines, Serpida-iVihQS, Leptoclinum stellates, casts of gastropods and lamellibranchs, 

 and Halimeda (rare). Cliona borings. 



Details. 



(377a-379a) [783]. Total length 255 millims. Greyish-white, hard, dense rock, with occasional small 

 hollows lined by mammillated deposit. Largely of corals, now for the most part solidly infilled and 

 replaced with crystalline dolomite. Orhicella, Madrepora, Porites arenosa, and Montipora (?). In the detrital 

 material, Miliolina, Carpenteria, Gypsina inhcerens, Gypsina, sp., Polytrema planum, Amphistegina and 

 Heterostegina. Serpula-tubes. 



(380a, 381a). Total length 115 millims. Rock like preceding, with casts of Madrepora, overgrown by 

 Polytrema planum and Lithothamnion. Orhitolites, Amphistegina and Heterostegina, 



(382a). Length 221 millims. Greyish- white, porous to compact, with but few hollows. More than 



