KKrOHT ON iMATEHIALS FW)M THE r.0Rli\(4S AT FUNAFUTI ATOIJ.. .",07 



oi Helioptim cd'rulea from a de})th of 48 feet : the first time tliiw coraJ lias been met 

 with ill this boriup-. The corals are, as a rule, filled in with hard tissue and obscurely 

 shown, they are bored by Cliona, the borings infilled \A'itli calcareous sediment. 

 Foramiuifera are not common in the cores ; the genera recognised are Orbitolitcs, 

 (jrijpsina inhwrens, Fvlytvema and Ampin stcgina. Echinid spines. Serpida, 

 LeptvcUivmn stellates. Lithodoinus. Lithothaniinon, encrusting corals. 



Details. 



(I) 18). Length -51 uiilliius., width 72 luillims. Piece of ;i .cylindrical core of hard, whitish limestone, 

 principally of LifhoflicDiinion with small .sV/;y////((-tul3es. A narrow hand of an Astra-an coral, OrhiccUa (V), 

 obscurely shown, is in the midst of the calcareous alga. 



(D. 19). Length 26 millims., width .58 raillims. A fragment of whitish-grey poi'ous limestone consisting 

 of Porite», with SerpiiJa-twhes and bored hy Cliona. 



(D. 20). Length 50 millims., width 58 millims. A fragment of cream-coloured limestone, consisting of 

 a piece of Madrcpora, partly encrusted ].)y Lifliofhainnion, Spirorhis on outer surface. 



(D. 21) [-105]. Length 58 millims., width 80 millims. Part of cylindrical core, cavernous, of greyish, hard, 

 compact limestone, consisting chiefly of Madreimra, l)ored by Cliona, and o\^ergro'\\'u liy a thick layer of 

 Tlfh ofh amnion . OrlntoUte^i. Serp u /((-tubes . 



(D. 22) [424]. Length 56 millims., ^^'idth 80 millims. Cylindrical core composed of Madnpora, 

 overgrown by Lithothamnion , similar to the preceding. The interspaces of the coral now filled U23 with 

 crystalline fibrous material not distinguishable from that of the coral itself. I'olytreina ininiaceuiii, P. plunuiit^ 

 Aiapliidegina, Leptodinuin stellates in the fine sediment which has infilled the Cliona borings. 



(D. 23). Length 72 millims., width 80 millims. Cylindrical core, cavernous, of greyish, hard limestone. 

 Incoherent detrital material filling some of the hollows. Madrepora confeda (?) riddled with Cliona and 

 other borings. Polytreina uiiiiiureiuu. Echinid spines. 



(D. 24). Length 63 millims., width 67 millims. Nodule of hard cream-coloured limestone, rounded by 

 drill, consisting of Madrepora contecta. 



(D. 25) [404]. Length 50 millims., Avidth 73 millims. Piece of cylindrical core with the inner surface 

 pitted and covered with Sjmwlis. Madrepora. Ainpjlnslegina Lessonii. Leptodinuni stellates. 



(1). 26). Length 42 millims., width 65 millims. An irregular nodule of Aladrepora, overgrown by 

 LitJiofhaiimion and this in turn l)y Po/ites. 



(D. 27). Length 28 millims., width 40 millims. A fragment of grey rock, consisting of Porifes. 



(D. 28). Length 30 millims., width 70 millims. A cake-shaped nodule of grey, compact, hard limestone, 

 probably of Madrepora, bored b}- Cliona and other organisms, and overgrown Ijy Lifliofhaiimion. The 

 exterior surface of nodule pitted and with Spjirwhis attached. 



(D. 28j) [415]. Length 23 millims., width 45 millims. An irregular, pitted nodule of grey hard limestone, 

 consisting of a piece of Madrepora, encrusted by Pohjtrerna pjlanwin and Lifhothainnion, and growing on this 

 latter a thin layer of HeliojMra cceridea. LepAodimun stellates. 



(D. 29). Length 74 millims., width 72 millims. About half a cylindrical core, of cream-tinted hard 

 limestone. The greater part is of Madrepora, very poorly preserved, and encrusted by Poli/trenia planum 

 and Lithothamnion. Also a piece of Orlncella {1). Spirorhi». 



(D. 30). Length 29 millims., width 43 millims. Eock like precetling. A fragment of Madrepora 

 nmteda (X). 



(D. 31). Length 47 millims., width 77 millims. A depressed core of whitish-gie\', hard limestone, 

 consisting of a mass of Madrepora confeda, \vith encrusting Litliothamnwn. Pohjlrema miniaceinu uiid 

 P. planum. 



2 R 2 



