Message to Matt,
The specimen looks very like a Rhizodus jaw. It has a partial tusk (right) and coronoid fang (middle) with smaller marginal teeth. The paper to read on this animal is Jon Jefferey's paper: https://www.academia.edu/521305/Mandibles_of_rhizodontids_anatomy_function_and_evolution_within_the_tetrapod_stem-group
As the locality is Burdiehouse, it is likely that it was obtained during the lifetime of the limekilns there:
http://www.scotlandsplaces.gov.uk/record/rcahms/143935/edinburgh-burdiehouse-burdiehouse-road-burdiehouse-limeworks/rcahms
The ones in our collection from Burdiehouse date back to the mid to late 1800s from the collections of Thomas Brown of Lanfine, Frederick Eck, and James Stokes.
Hope this is a help,
Neil
Dr Neil D. L. Clark
Curator of Palaeontology
The Hunterian
University of Glasgow
Gilbert Scott Building
Glasgow G12 8QQ
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Tel: +44(0)141 330 7666/4561/4221
Website: www.glasgow.ac.uk/hunterian
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