Carbonicola agrestis (Brown 1843), described with C. heyue, C. rugosa and C. smithii, were recorded from "Ironstone Shale" at or near "Sheden", a locality lost for many years. Non-marine bivalves dosely comparable with Brown's figures of C. agrestis and C. heyue were recently discovered in an old tip at Shedden. about 6.5 km southeast of Burnley. With other evidence the material suggests that Brown's species were collected from a small mine in this locality and from a horizon not more than 3.7 m above the Arley Mine.