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Ten Pound Island, Gloucester Harbor, Gloucester, Massachusetts, USA
latitude: 42.6021
longitude: -70.665497
Precision of location: Gauged from chart or map
Site Named Here: By name of island, bay, strait, lake, river, or stream, etc., named in source publication
| Leptoplana variabilis | 1878 | tide pools, under stones, on piers of wharves. |