EEPORT ON MATERIALS FROiM THE BORINGS AT FUNAFUTI ATOLL. 295 



porous, with occasional cavities. Largely of casts of Cn'loria, Astrcca (1), OrhiccUa, Madrepora, and Porifcs. 

 The corals are encrusted with Pohjfrema p^amiiii and LifJiofhaumion. The principal foraminifcra are 

 Orbifolifes and Amphut)'gma. Echinid spines. Casts of gastropods. Cliimn, borings. 



(685a, 686a). Total length 222 millims. Greyish to greyish-brown, compact to porous, with irregular 

 hollows in places. Mainly composed of coral casts ; Ccel&i'ia, Astrcm (?), and an undetermined perforate. 

 Pohjtrenm planuiii, Amplhidegina. Casts of gastropods. Lifhothamnion. 



(687a, 688a). Total length 270 millims. Greyish, porous, with occasional cavities. The cores prin- 

 cipally consist of casts of Cceloria and Astrcea. Alcyonarian spicules. Orhitolites, Pol i/trema planum, in 

 thick layers, encrusting corals. Echinid spines. Casts of lamellibranchs and gastropods. Encrusting 

 and branching LithofJmmnion. 



(689a-690a). Total length 257 millims. Greyish-white, hard, compact to porous, with some cavities. 

 Nearly altogether of corals, which are overgrown by thick layers of Poli/trema jdanunu Cceloria, Astrcea, 

 Orbicella, Madrepora, Porifcs, and other perforate forms, which appear to be in their natural position 

 of growth. Alcyonarian spicules. Echinid spines, Serpula-tuhes. Orhitolites, Amphistegina. Lithodomus 

 borings. 



(691a-692a). Total length 185 millims. Greyish-white, porous, and cavernous. Mainly of coral casts 

 overgrown by Polijtrema planum, with somewhat coarse fragmental materials in the interspaces between. 

 Astrcea, Goniastrcea, Lobophytum, detached alcyonarian spicules. Orhitolites, Amphistegina. Echinid spines. 

 Casts of gastropods. Lithothamnion. 



(693a-694a) [829]. Total length 149 millims. Greyish, compact to porous, occasional hollows. Cores 

 chiefly of casts of corals ; Cceloria, Astrcea, Porites, and another perforate (?) Twhinaria, bojed by Lithodomus. 

 Orhitolites, Polytrema, Amphistegina. 



(695a). Length 246 millims. Greyish, compact to porous, occasional hollows. Casts of Cyphastrcea 

 and other Astrsean corals. Lohophytiun, detached alcyonarian spicules. The larger part of the cOre 

 consists of foraminifera and coarse fragmentary materials. Orhitolites, Texlularicc, Planorhulina, Polytrema 

 planum, and Amphistegina. Echinid spines. Lithothamnion . 



(696a-697a). Total length 224 millims. Greyish-white, porous, with occasional cavities. The lower 

 third of the cores consists of a specimen of Cceloria, apparently in position of growth ; the upper two- 

 thirds are chiefly foraminiferal and fragmental, with, however, some small perforate corals. Two examples 

 of Lobophytum and detached alcyonarian spicules. The foraminifera belong to Orhitolites, common, 

 Polytrema j;te«.?WH and Amphistegina Lessonii very abundant. Echinid spines. Casts of gastropods. 

 Cliona borings. lAthothamnion. 



(698a). Length 158 millims. Greyish- white, porous, with irregular hollows. The core consists chiefly 

 of corals, apparently in position of growth. Cceloria, large specimen, growing on Cyphctstrcea. Young 

 form of Madrepwa. Orhitolites numerous, Polytrema planum, Amphistegina. Echinid spines. Lithothamnion. 



(699a-700a) [830]. Total length 143 millims. Whitish, hard, porous, efilorescent. Casts of Siderastrcea, 

 obscurely shown. Millepora ; alcyonarian spicules. Orhitolites, Carpenteria, Gypsina globulus, Polytrema in 

 thick, encrusting layers, Amphistegina abundant. Echinid spines. Cliona borings infilled with fine 

 sediment. LeptocUnmn (?) stellates. Casts of gastropods. 



(701a) [831]. Length 266 millims. Rock like preceding, in places efflorescent. Casts of Astrcea and 

 Siderastrcea. Millepom, apparently in position of growth. Alcyonarian spicules. Core mainly of 

 foraminifera and fragmental materials ; the former are well shown, they belong to Miliolina, Orhitolites, 

 Textularia, Glohigerina, Planm-hulina, Carpenteria, Gypsina inhcerens, Polytrema, and Amphistegina. Echinid 

 spines. Cast of lamellibranchs. Lithothamnion. 



(702a). Length 164 millims. Whitish, hard, minutely porous, with irregular hollows, similar to the 

 preceding, except that it is not efflorescent. The only coral distinguished is a cast of Siderastrcea. 

 Alcyonarian spicules. The core is chiefly of foraminifera and detrital materials ; the most prominent 

 forms- are Orhitolites, very numerous, Polytrema, and Amphistegina. Echinid spines. Serpula. Casts of 

 lamellibranchs. 



