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