Specimens of the ammonite Dactylioceras commune, collected from Whitby, UK. These specimens are Jurassic in age and part of the Upper Lias – a group of rocks deposited between the Late Triassic and Early Jurassic. These are pairs of positives and negatives. Available in two different grades. Each pair measures approximately 2 – 3 inches. They come in a white card tray with an information label.
