A Notice of the Geology of Jamaica, especially with reference to the District of Clarendon; with Descriptions of the Cretaceous, Eocene, and Miocene Corals of the Islands

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Abstract
1. Introduction . T he Corals from Jamaica hitherto described came from the inclined white limestones, and from the shales and sands subordinate to them; their Mid-tertiary age has been demonstrated, together with that of the Shells and Foraminifera ; and the general succession of the Tertiary strata has been brought several times before the Society. All the Corals, moreover, which have been described from the other islands of the Caribbean Sea were derived from strata of a Miocene age. But this communication refers to the Cretaceous and Eocene as well as to the Miocene fauna of Jamaica, and it offers the first palæontological proofs of the existence of the Eocene formation in the West Indian Islands†. To do justice to those engaged in the geological survey of Jamaica, it is necessary to bear in mind that there is no good map of the island, no perfect trigonometrical survey, that dense vegetation covers everything, and that the physical difficulties are very great. Hence it has arisen that the geology of the island is still in its infancy. The general features of the country have been determined, and the relations of the series of formations also, but their palæontology has not been much studied. After the publication of Sir. H. De la Beche's memoir on Jamaica, little was done for many years in the geology of the island, and the first important communication on it was a diagram of the succession of the strata, which was drawn by the late Mr. Barrett, and which

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