258 DR. G J. HINDE. 



Orhitolites in considerable numbers. Alcyonarian spicules and echinid spines are 

 generally distributed. A few casts of gastropods. Lithothamnion and Halimeda. 



Details. 



(216a). Length 273 millims. Creamy-white, hard, compact to porous, dolomitic limestone. With the 

 exception of two brownish patches, where corals may have been originally, this solid core is composed of 

 fine detrital material with foraminifera. Comparatively little can be distinguished with a lens ; the only 

 forms recognised are Orhifolifes and Pol j/hvma planum, also echinid spines. 



(217a) [741J. Length 175 millims. Whitish-grey, hard, mostly compact. A few indications of small 

 corals, but the structure is nearly entirely obliterated, so that no determination is possible. Pohjtrona 

 planum, showing structure, surrounds the spaces where corals have been. Core almost entirely of detrital 

 materials and foraminifera belonging to Ghbigerina, Carpenteria, Poli/frciiui miniaccuiii and J niphistegina. 

 Alcyonarian spicules, echinid spines, fragments of Litliothamnion. The materials cemented with crystalline 

 dolomite. 



(218a, 219a). Total length 202 millims. Eock similar to preceding. A single cast of coral noted; the 

 core of miiuite fragmental materials and foraminifera. OrhHolifcA nviiplanafa is the only form recognisable 

 with a lens. 



(220a, 221a). Total length 28-5 millims. Cream-coloured, hard, minutely poroiis, M'ith occasional 

 cavities lined by crystalline dolomite. A few traces of small corals, one an Astraean. OrbifoUfes abundant, 

 Aniphisfcr/ina. Large echinid spines. Casts of gastropods. 



(222a) [742]. Length 93 millims. Whitish, hard, compact, with porous areas, and with one or two 

 cavities where corals have probably been dissolved out. The core appears to be partly dolomitic, partly of 

 calcite. A microscopic section shows that the rock consists of fragmentary and entire foraminifera in fine 

 detrital material. OrhitolitcA, Carpenteria, Cakarina, Gj/psina inluerenf:, Pohjtrema niiniacenm, P. planum, 

 Amplmtegina, and Heterostegina. Alcyonarian spicules, echinid spines. Casts of gastropods. 



(223a). Length .54 millims. Rock similar to preceding. Casts of Sti/lophara and Ulai/r/pora, encrusted 

 by Poli/frenia planum. Orhifollfes. Echinid spines. 



(224a) [743]. Length 106 millims. Whitish, hard, mostly compact calcite, with some dolomite. One 

 or two hollows in which corals may have been. Mainly of foraminifera in fine detrital mateiial, their 

 structures well shown in microscopic section. The same forms as in Core 222a, with the addition of 

 Spirolorulinu and Textularia. Alcyonarian spicules numerous, showing their normal fibrous structure, 

 echinid spines. Casts of small gastropods. Small fragments of Lifliofhamn/on ; other fragments, now 

 crj^'stalline, which may originally have ])een of corals. Halimeda (?). 



(22.5a) [587]. Length 212 millims. Whitish-grey, hard, minutely porous to compact, partly dolomitic 

 limestone. One or two hollows. Indications of corals in places, but now replaced by crystalline matrix. 

 Core nearly altogether foraminiferal, the same forms present as in 222a. ()i-hifolHc>i and ('aJcnrina are 

 very inimerous. Echinid spines. Lif/wfliamniun. 



(226a) [744]. Length 151 millims., 57 millims. in diameter. Whitish-grey, hard rock, like preceding, 

 with occasional cavities. Several small corals very indistinctly shown. An Astrisan, Mai/repora, and 

 Axtra'opom (f). The same foraminifera as in 222a. Alcyonarian spicules numerous ; echinid spines. 

 Numerous fragmentary foraminifera and other organisms. Litliothamnion. Halimeda seldom. Banded 

 stalactitic structure lining the cavities. 



227a. Length 260 millims. Whitish-grey, hard, compact to minutely porous. Traces of small corals 

 enclosed by undulating layers of Lithothamnion. Core mainly of foraminifera and fine detritus, like the 

 preceding, but the only forms distinguishable with a lens are Orhitolites and Aniphistegina. Echinid spines. 



(228a). Length 286 millims. Whitish-grey, hard, compact to minutely porous, very uniform, dense 

 rock. Closely similar in character to the preceding core. Very little to be distinguished with a 



