Whilst looking over the private collection of fossil fishes made by the late Dr. R. H. Traquair, I found a small tetrapod femur. This bore no label of any kind, but was included in a series of remains of Dipnoi from the Lower Carboniferous of Scotland. The texture of the bone is not unlike that of Ctenodus, and was no doubt the reason of its place in the collection.

The very small piece of matrix which is preserved is identical with that of some of the fish from the No. 2 Ironstone, Loanhead, and differs from any other fish-bearing matrix that I know in Britain. [Any one with experience of Carboniferous fishes will recognize that it is usually fairly easy to identify the important localities (the Loanhead ironstones, the various Staffordshire ironstones, etc.) by inspection of the matrix.] Despite the fact that it was not localized, I think that the probability of its being from the Loanhead ironstones is sufficient to justify a description.