272 DR. G. J. HIKDE. 



one-third the core of Puiites arenosa and another perforate coral, infilled with crystalline material. Corals 

 overgrown, as usual, with Poh/trema and Lifhothamniun. Orhitolites and Hcterostegina. 



(383a). Length 80 millims. Whitish-gre}^, mostly compact, dense. Casts of Pocillopcmi with Pohjtrema 

 and Lithothamnion. Carpenferia. 



(381:A, 38-5a). Total length 255 millims. Grey with greyish-white areas, compact to porous, with 

 occasional hollows. About two-thirds the core of Pontes arenosa, replaced by crystalline dolomite. The 

 corals in position of growth. Intermediate detrital areas with a large amount of branching Lifltothamnion. 

 Pohjtrema planum. 



(386a, 387a). Total length 233 millims. Eock similar in character to preceding. Mainly of I'orites 

 arenosa and branching Lithothamnion. Poli/trema planum and Amphistegina. 



(388a, 389a) [784]. Total length 342 millims. Whitish-grey, hard, partly porous, partly compact, 

 with small hollows. With the exception of a few small casts of corals, the cores almost entirely consist 

 of fine consolidated organic sediment, now cemented hy crystalline dolomite, with numerous foraminifera 

 and a large amount of branching Lithothamnion in good preservation. Alcyonarian spicules. The 

 foraminifera belong to 3Iiliolina, Orhitolites, Huddmia, Gi/psina inhwrens, Polytrema miniaceum, P. planum, 

 Amphistegina and Heterostegina. Halimeda (rare). 



(390a). Length 168 millims. Greyish-white, dense rock, with some hollows where corals have been 

 removed. Cast of an Astrsean coral which occupies about one-third the core, the remaining portion 

 fragmental, like the preceding, but the Lithothamnion is less prominent. Coral encrusted by Pohjtrerna 

 planum. Alcyonarian spicules abundant. 



(391a). Length 160 millims. Greyish-white, mostly compact, with small hollows. Astrjean coral, cast 

 of Madrepora. Portion of stem of Lohophytum, about 90 millims. in length by 20 millims. in width, the 

 spicules in close juxta-position without definite arrangement ; some are solid, others empty casts. Larger 

 part of the core of detrital materials, Avith much branching Lithothamnion. Amphistegina. 



(392a, 393a). Total length 264 millims. Greyish-white, hard, porous to compact, cavernous in places, 

 where corals have been removed. Greater part of core consists of corals, mostly replaced by crystalline 

 dolomite, the remaining portion detrital, with much branching Lithotliamnion. The corals belong to 

 Astrcea lohutu, EllIS and SOLANDER, and Pmites arenosa ; they appear to be in the position of growth. 



(394a, 395a). Total length 312 millims. Greyish, with white spots, hard, mostly compact, with a few 

 hollows. Small casts of Asfra'a lohata, Madrepora, and Porites arenosa. The greater part of the cores 

 consists of detrital materials, with branching Litltothamnion (numerous), and alcj'onarian spicules. 

 Amphistegina, Cast of gastropod. 



(396a). Length 158 millims. Whitish to cream-coloured, moderately hard, porous. It contains small 

 casts of Pocillopora and Madrepora ; the greater part of the core is of detrital materials, with OrhitoPifes, 

 Teztularia, Polytrema planum, alcyonai'ian spicules, Lithothamnion, and casts of gastropods. 



(397a). Length 235 millims. Whitish to cream-coloured, porous, cavernous in places. Larger part of 

 corals. Casts of Astrcea and Porites arenosa, encrusted by Polytrema planum and Lithothamnion. Detrital 

 materials, with Orhitolites, Amj)histegina, and alcyonarian spicules. Cliona borings. 



(398a, 399a) [595]. Total length 440 millims. Whitish to cream-coloured, hard, minutely porous, 

 where small organisms have been dissolved. Casts of small examples of Pocillopora, Madrepora, Porites, 

 Montipom (?), and Millepm-a, now for the most part replaced by crystalline dolomite. Greater part of cores 

 of detrital materials, as in the preceding, with the addition of Iladdonia, Glohigerina, Carptenteria, 

 Planorhulina, and Heterostegina. Leptodinum stellates. Casts of lamellibranchs. Echinid spines. 



(400a, 40lA) [78.5]. Total length 471 millims. Whitish, moderately hard, very porous. Small casts of 

 Pocillopora and Millepora. Cores nearly altogether of minute fragmental materials, with Orhitolites, 

 Teztularia, Carpenteria, Gypsina, Polytrema miniaceum, P. planum, alcyonarian spicules, echinid spines, and 

 plates, and also with numerous fragments of Lithothamnion, which are cemented by crystalline dolomite. 



(402a, 403a). Total length 233 millims. Rock whitish, moderately hard, porous, like the preceding. 



