Abstract
Recent papers and discussions have called attention to the fauna of the Yoredale facies of the Lower Carboniferous. These beds are well exposed in the valleys of Wensleydale and Swaledale in North West Yorkshire and they are there, perhaps, the most fossiliferous. As this is the type district for the Yoredale series, a brief statement of the more important faunal horizons would not be out of place.

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