Which format is best?
If you use Microsoft Excel or you can read an Excel file with other software, then I strongly recommend you download my list as an EXCEL SPREADSHEET.
If you have difficulty reading an Excel file, the PDF version may work best for you. It will open in Adobe Reader. However, many of the features of the list (filtering, links) will be lost.
You may also contact me by email to discuss other options. For example, I can email you a list of just a single family.
The list is in taxonomic order, with colour coding (e.g. terrestrial snails are in green text).