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The Barrettia Beds of Jamaica

Published online by Cambridge University Press:  01 May 2009

C. T. Trechmann
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Extract

Barrettia, the most abnormal of the Rudistæ, and among the strangest of all the mollusca, was first found in Jamaica by Lucas Barrett, F.G.S., in the year 1861. The specimens were ably described by S. P. Woodward, F.G.S., in 1862. The original specimens, now in the British Museum of Natural History, consist of polished transverse and longitudinal sections of the upper part of the shell, the latter showing the junction of the upper and lower valves, and a cross section of the young shell near the apex of the lower valve. They were called Barrettia monilifera in honour of the discoverer. The locality where they were found was on the banks of the Back River, a tributary of the Rio Grande, about 15 miles from the coast in Portland Parish in the north-east of the island. The rock is described as a hard, grey limestone which occurs in bands of a few inches to a yard in thickness, subordinate to many hundreds of feet of shale which graduate up into other grey shales of the Eocene, followed by white limestones of Miocene age.

Type
Original Articles
Information
Geological Magazine , Volume 59 , Issue 11 , November 1922 , pp. 501 - 514
Copyright
Copyright © Cambridge University Press 1922

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References

page 501 note 1 “Some account of Barrettia, a new and remarkable shell from the Hippurite Limestone of Jamaica”: The Geologist, London, 1862, pp. 372–7.Google Scholar

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page 503 note 2 “The Geology and Physical Geography of Jamaica”: Bull. Mus. Comp. Zoology, Harvard, vol. xxxiv, 1899.Google Scholar

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page 508 note 1 I await with interest Professor Douvillé's report on this and other Jamaican foraminifera.Google Scholar

page 509 note 1 “Observations on the genus Barrettia,” loc. cit., p. 239.Google Scholar