The sample preparation method is presented in Engel and McCartney (this volume). For all studied samples, at least three transects across the length of the slide were made in search of silicoflagellates, with up to a whole slide examined where silicoflagellates were found to be present or the abundance or quality of diatoms suggested that silicoflagellates might be present. The presence of one or two specimens of a taxon are shown by an "X" in the tables; more than two specimens are shown by a "#." Total number of silicoflagellate specimens found is also provided in the tables.