Overlapping markers can be separated by clicking on them.
Hovering the cursor over a marker will show the site's name.
Clicking on a marker will show information available about the collection site. (Compare with corresponding letter in table.)
Guernsey, England (English Channel)
latitude: 49.466667 49 28 N
longitude: -2.516667 2 31 W
Precision of location: Gauged from chart or map
Site Named Here: By name of site (or city, etc.)
| Convoluta convoluta | prior to 1905 | littoral | ||
| Convoluta paradoxa | 1866 or earlier |