Scottish National Dictionary (1700–)
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First published 1976 (SND Vol. X, list of scientific terms with Scottish connections).
This entry has not been updated since then but may contain minor corrections and revisions.
TARRASIUS. Geol. A genus of fossil ganoid fishes (1881 R. H. Traquair in Trans. Royal Soc. Edb. XXX. 1).
[From Tarras, near Langholm, Dumfriesshire.]