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II.—Note on the Discovery of the Oldest Known Trigonia (T. Lingonensis, Dumortier) in Britain
Published online by Cambridge University Press: 01 May 2009
Extract
The ironstone of Cleveland is a repository for a number of interesting species of Mollusca, amongst which a Trigonia deserves especial notice, representing as it does the oldest form of the genus, and now recorded for the first time as British.
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