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.)
| site | collection date | depth | substrate | salin | locality kind | comments | reference | |
|---|---|---|---|---|---|---|---|---|
| A | Block Island, Rhode Island, USA | 1873 or earlier | 29 fathoms | Verrill AE, Smith SI (1874) 487, 632, 633 |