Region
Alabama
1
Argentina
2
Arkansas
2
Australasia
1
Australia
1
Baltimore
1
Brazil
2
Burgess Shale (B.C.)
1
California, Gulf of
1
California, Gulf of (Mexico)
1
Central Australia
1
Dayton
2
Dayton (Tenn.)
1
Dover
2
Dover (Township)
4
Earth (Planet)
16
Edinburgh (Scotland)
2
England
22
Europe
2
Florida
1
Galapagos Islands
3
Germany
4
Grande-Bretagne
1
Great Britain
20
Hawaii
2
Islamic countries
1
Japan
1
Kansas
1
London
1
Madagascar
1
Madeira Islands
1
Malay Archipelago
1
Maryland
1
Mexico
1
Pennsylvania
6
Polar regions
2
Québec (Province)
1
Southeast Asia
2
Soviet Union
2
Tennessee
17
USA
1
United States
44
United states
1
Washington (State)
1