250 DR. G. J. HINDE. 



two-thirds of the core consists of an Astrsean coral (?) OrhiceUa, probably in position of growth. The coral 

 is surrounded by nodular and encrusting Lithothaiimion. Remainder of core consists of foraniinifera and 

 f ragmental material ; but little can be distinguished under a lens. 



(124a) [720]. Length 93 millims. Greyish-white, banded, partly compact, partly porous, and with 

 small cavities. Cast of meandriform coral (?) Ccelovia. About one-third of the core of Lithofhanmim, in 

 white, thick, undulating layers, very dense and opaque, but when reduced to thin sections the structure 

 is fairly well shown ; rows of oval conceptacles are present. Culmrina, Gi/psina veHicuhri^, var. dixcnx, 

 Folytroaa plannm, Amphistegina, and Heimvstegina. Alcyonarian spicules. Echinid spines. Gastropod 

 casts. 



(125a). Length 68 millims. Greyish-white, mottled, hard, very cavernous. Core mainly of thick, 

 white layers and branches of Lithotliainnion, like the preceding. Casts of small perforate corals, filled up 

 with the dolomitic matrix. Foraminifera and debris, as in the last core. 



(126a, 127a, 128a). Total length 234 millims. Grey, speckled, hard, generally compact, dolomite, 

 with occasional cavities where gastropods have been dissolved out. Casts of branching Seriafopora, and 

 other small corals not determinable. Corals overgrown by Lithotltainnion. The cores are nearly entirely 

 of foraminifera and miiuite detrital materials ; the only forms recognisable under a lens are Orhifolitca and 

 Amphistegina. Sm'pula. 



(129a). Length 98 millims. Grey, hard, dense, with several small cavities. Casts of small corals, 

 enclosed by Lithofhainntion, and infilled by crystalline matrix. Larger part of core consists of foraniinifera 

 and detrital material. 



(130a). Length 126 millims., by 58 millims. in diameter. Grey, hard, compact for the most part, 

 in places porous and cavernous. Core mainly of coral casts ; Astraean, Madrcpora, and Poritcs, cf. 

 P. artnosa. 



(131a) [721]. Length 107 millims. Whitish-grey, speckled, haid, mostly compact and dense, central 

 portions slightly cavernous. Casts of small perforate corals, Madirpma (?) and Montipom (?) ; they are 

 replaced by dolomite, and encrusted by Lithuthainnioa. About two-thirds of the core consists of 

 foi'aminifera and fragmental material. Calcarina, Gypsina vesicularis, xav. discus, Pohjtrenta pJanuiii, and 

 Heterostegina. Alcyonarian spicules, but little altered. Echinid spines. Serpula-tuhes in groups. Cast of 

 small Ecliinus. 



(132a). Length 98 millims. Greyish, mottled rock, hard, mostly compact, with some small cavities. 

 Several casts of small forms of Madrepwa and Montipwa (?), encrusted by Lithotliamnion. Foraminifera 

 and minute fragments, same as in previous core. Snpida, branching Liflio/Juuiiniun. 



(133a) [722]. Length 140 millims. Greyish, mottled, mostly compact, with occasional cavities. 

 Largely of casts of corals, enclosed by layers of Litlwthaiimion, the casts for the most part 

 infilled with crystalline dolomite, whilst in some there are infilled borings of Cliona, &c. PociUopara, 

 Madrepom contecta, Mmtipara (?). Orbitolifcs, Puli/trcnia minkiceuin, P. planum, Amphistegina, and Hefero- 

 sft-gina. Alcyonarian spicules. Echinid spines, their structure almost obliterated. Halinieda. Casts of 

 gastropods. 



(134a) [723]. Length 85 millims. White, with a few greyish spots, porous, the white ijoitions are 

 soft, incoherent, can be scratched with the finger nail, whilst the grey are hard and compact. 

 The entire core, except one corner, is a mass of Madrepm-a canteda, the coral is replaced by crystalline 

 dolomite, whilst the interstices are in part empty, in part filled with white, opaque, detrital material. 

 Li upper end of core cast of Astrsean coral, but little shown. Casts of gastropods. Nodules of 

 Lithothaiiinion. Alcyonarian spicules. Amphistegina. 



(135a) [724]. Length 176 millims. Whitish-grey, mottled and speckled, paitly compact, partly 

 porous, hard, some cavities where gastropods and corals have been dissolved out. Cast of Madre- 

 jMia cunteda and other pei'forate corals replaced by dolomite. Fragment of Lobaphytuiii 23 millims. 

 long by 8 millims., as shown in section, with the spicules in position. They are for the most i)art 

 unaltered, and retain their fibrous structure; in some instances, howevei', their interiors have been 



