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near Santa Rosa Island, California, USA
latitude: 34.0564
longitude: -120.130096
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
| Plehnia caeca | Apr 1941 | 85.95 m | mud | |
| Plehnia caeca | Apr 1941 | 85.95 m | mud | |
| Cryptocelis occidentalis | Apr 10, 1941 | 27.4 m | shelly | |
| Notoplana rupicola | Aug 25, 1941 | 190.2 m | taken by the Allan Hancock Foundation. | |
| Euryleptodes insularis | Aug 10, 1939 | 20 m | 3 specimens taken by the Allan Hancock Foundation. |