A detailed study of the jaw elements of Polychaete worms Silurian Paulinitid Polychaetes from Gotland is Number 25 in the Fossils and Strata series of monographs and memoirs in palaeontology and biostratigraphy. The author studied the preserved jaw elements of the Paulinitidae family of Polychaetes. Examined materials were from the Silurian sections on the Island of Gotland, Sweden. The study was based on specimens taken from over 700 samples. This study documentation, along with others in the Fossils and Strata series, features taxonomic descriptions.