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Published online by Cambridge University Press: 15 September 2014
The material which forms the subject of this present paper was found in Coal Measure Shales exposed in the bank of the River Nethan, near Crossford, Lanarkshire, Scotland. The geological age of these beds is the Productive Coal Measures, Upper Carboniferous. The outcrop is near the position of the Kiltongue Musselband, about 8 fathoms above the Kiltongue Coal.