Place
- Sierra Nevada (Calif. and Nev.)3
- Boothbay Harbor (Me.)2
- Canada2
- Central Valley (Calif.)2
- Greenland2
- Hopkins Marine Station2
- Muscongus Bay (Me.)2
- New York Harbor (N.Y. and N.J.)2
- Pacific Grove (Calif.)2
- Rocky Mountains2
- Salinas (Calif.)2
- Salinas River Valley (Calif.)2
- San Francisco Bay Area2
- San Luis Obispo County (Calif.)2
- Africa1
- Asia1
- Atlantic Coast (New England)1
- Atlantic Coast (U.S.)1
- Boon Island (Me.)1
- Bronx River (N.Y.)1