Canada, St. Croix River, St. Andrews, off Joe's Point, 45.07500 -67.08889, depth 16 m. [details]
USA, Cobscook Bay, Eastport, near Estes Head, 44.89333 -66.99361. [details]
Frederickshaab, Greenland (Hincks 1877) [details]
England, Northumberland, North Sea, 30 miles east of Holy Island. [details]