Description: Nuculana_pernula from British Pleistocene Crag deposits. Date: 1848. Source: Wood, S.V., 1848. A monograph of the Crag Mollusca, or, description of shells from the Middle and Upper Tertiaries of the east of England, 1. Univalves. Author: Wood (scan by Tom Meijer, 26-6-2007). Permission(Reusing this file): author died more than 70 years ago.