Published online by Cambridge University Press: 11 May 2009
The features and history of a poikilohaline lagoon near Titchwell, Norfolk, England, are described and its invertebrate fauna (recorded between 1959 and 1970) is listed. The list includes 44 species new to the lagoon since 1959 (26 species new to the Scolt Head region and four species new to Norfolk). It is considered that the fauna is of the relict type, perhaps representing what remained of a former salt-marsh fauna together with some marine species. Notes are included on the biology and geographical ranges of several species which are rare or have imperfectly known distributions in Britain. The records of five particular species are believed to represent the northern limits of these animals on the east coast in 1971, when Titchwell Lagoon was drained, destroying the fauna and flora.