REPORT ON MATERIALS FROAf THE BORINGS AT FUNAFUTI ATOLL. 289 



they comprise Mih'oli)ia, Orbitolitcs, Tcxtulnria, Glohigerina, Planorhulina, Car- 

 2)e7iteria, Calcarina, Gypsiiia, Folytrema, Amphistegiua and Heterostegina. Echinid 

 spines. Casts of gastropods and lamellibraiichs. Litfwthamuion. In one of the 

 cores thei'e is a fragment of fish-bone or spine, the first and only fragment of a 

 vertebrate skeleton which has been met witli. 



Details. 



(608a). Length 240 millims. Greyish-brown, compact to minutely porous, with a few small hollows. 

 Casts of small corals fairly numerous ; Stijloplmra, Pocillopora, Orbicella, Madrepora and Forites. The 

 foraminifera belong to OrhifoHtc'i, (ri/pdna, PoJijtrcina and Amphiaterjina. Amongst the fragmentary materials 

 there are echinid plates and spines, small gastropods and Lifhothamnion. 



(609a, 610a). Total length 522 millims. Rock similar to the preceding, but also with one or two 

 large hollows. The corals and other oi'ganisms very obscurely shown. Casts of Stijlophom, Pocillopm-a, 

 Orbicella and Pontes. With the exception of Orhitolites, which was not observed, the foraminifera and 

 the other fragmentary organisms are the same as in the core above. The cavities lined with banded 

 crystalline dolomite. 



(611a-617a). Total length 671 millims. Rock greyish-brown, hard, crystalline and compact, and in 

 places very cavernous. By far the larger part of these cores appears to consist of foraminifera! and 

 fragmental remains ; coral casts are present occasionally, but they are now so altered and replaced by 

 crystalline material, that, beyond Montipara and a simple Astraean, they cannot be determined. 

 Alcyonarian spicules are present. The foraminifera include Orhitolites, Planorhulina, Gi/psina, Pohjtrema, 

 Amphistegiua and Heterostegina. Echinid spines and plates ; casts of gastropods ; fragments of 

 Lithothamnion. 



(618a-620a) [601, 816.] Total length 252 millims. Greyish-white to greyish-brown, mottled, mostly 

 compact, with occasional hollows. With the exception of some layers of Montipora, overgrown by 

 Polytrenia planitm, these cores chiefly consist of foraminifera, detrital fragments and fine sediment, 

 with numerous minute detached rhombohedral crystals [816]. Loboptii/tuin and detached alcyonarian 

 spicules. The foraminifera are well preserved, and show their structure in microscopic sections. The 

 following were determined by Mr. Chapman : — Miliolina, 2 sp., Orbitolites, Textularia, Glohigerina bulloides, 

 Planorbulina larvata, Carpenteria, Calcarina, Gijpsina, Polytrema, Amphistegina and Heterostegina. Echinid 

 spines. Lithothamnion. 



(621a) [817]. Length 245 millims. Greyish-white, compact, cavernous in places. The core contains 

 some obscure casts of perforate corals, and the same kinds of foraminifera (with the exception of Textularia 

 and Glohigerina) and detrital organisms as in the preceding. There is also a fragment, about 20 millims. 

 in length, of a fish-bone or spine. Serpula. 



(622a). Length 231 millims. Greyish-brown, with white flecks in places, hard, mostly compact with 

 some irregular hollows. The core chiefly consists of casts of corals, now solidly replaced and infilled with 

 crystalline dolomitic limestone. Sfi/lojjhora, PociUopora, simple Astraean, Montipora and Psainmocora. 

 Lobaphytum.. The foraminifera include Orbitolites, Planorhulina, Polytrema, Amphistegina, and Heterostegina. 

 Lithodomns. Casts of gastropods. 



(623a) [818, 819]. Length 222 millims. Greyish-brown, compact generally, but with some porous areas 

 and occasional hollows. Core largely of corals, in the same condition as in the preceding. Stylophora, 

 PociUopora, Seriatopora, Orbicella, simple Astraean, and Psammocora with some obscure perforate corals. 

 Specimen of I^obophytmn overgrown by Polytrema pjlamun, the spicules in it retaining their minute structure. 

 The foraminifera belong to Orhitolites, Carpenteria, Calcarina, Gypsina, Amphistegina, and Heterostegina. 

 Echinid spines. Casts of lamellibranchs and gastropods. Nodular growths of Lithothamniun. 



(624a, 625a). Length 194 millims. Brownish-grey, mostly compact and crystalline; a few small 



2 p 



