Data file: 'Theba pisana Bold Park data' Description: Tab delineated text file with morph frequencies in 5m x 5m quadrats along transect at Bold Park, Perth, Western Australia, 1989-2010. Collect of data and contact for further information: Michael Johnson School of Animal Biology (M092) University of Western Australia Crawley, WA 6009 mike.johnson@uwa.edu.au Column headings: Year = year of collection Month = month of collection Habitat = habitat (Acacia or Open) for the quadrat Distance from west end, m = position on transect FB Pale = number of Fully Banded snails with pale apex (all snails >10 mm diameter) FB Dark = number of Fully Banded snails with dark apex (all snails >10 mm diameter) EUB Pale = number of Effectively Unbanded snails with pale apex (all snails >10 mm diameter) EUB Dark = number of Effectively Unbanded snails with dark apex (all snails >10 mm diameter) Total = total number of snails snails >10 mm diameter