The city of Nottingham is built upon the outerop of the Trias. Building and road-making operations consequent upon its rapid growth often lead to the laying bare of the underlying Bunter, Keuper Waterstones and Marls. Unfortunately the wort is usually carried on with such rapidity that good exposures are often missed. A temporary cessation of activities in one part of the Sherwood suburb, however, left a beautiful exposure of the Waterstones. A careful examination of this during the past few months has led to the discovery of footprints and fish-remains. The footprints are of a type which does not seem to fit into the generally used system of classification. In 1857 the Rev. A. Irving found a Cheirotheroid print in the railway cutting at Colwick. This is the only record of the previous discovery of footprints in this district.