Burrows and surface traces from the lower chalk of southern England

The Lower Chalk of Southern England comprises between 17 and 80m. of rhythmic alternations of more or less calcareous marly chalk. The whole sequence is intensely burrowed, the following burrow types are named: Thalassinoides saxonicus (Geinitz), T. cf. suevicus (Rieth), T. ornatus ichnosp. nov., T. paradoxica (Woodward), Spongeliomorpha sp., Spongeliomorpha? annulatum ichnosp. novo and Chondrites sp. Several other forms are discussed, including "  Terebella" cancellaia Bather and Keckia (?) sp. Five burrow types too poor for detailed description are noted and discussed. Two other trace-fossils, "laminated structures", regarded as related to T. saxonicus and Pseudobilobites [efferiesi ichnosp. novo (the" problematicum" of Jefferies (1961, 1963)) are also described. The Eocene form "Terebella" harefieldensis White is briefly discussed and interpreted as a crustacean boring. Thalassinoides, Spongeliomorpha "laminated structures", Pseudobilobites," Terebella" cancellata and two of the unnamed burrows are regarded as the product of crustaceans, Chondrites and the other un-named burrows are attributed to "worms", Other trace fossils-borings and micro-coprolites-are also noted.