I am indebted to Thos. Parker, Esq., of Oldham, for the opportunity he has afforded me of examining his large collection of fish-remains from the Carboniferous Limestone of Derbyshire. The specimens have been obtained from quarries near Chapel-en-le-Frith, in the N.W. of the county. They are for the most part in a beautiful state of preservation, though some of the more fragile specimens are only obtained with the most careful manipulation on account of their liability to fracture. The fossils are creamy-white in a light-coloured crystalline limestone matrix.