Collection place
- Humboldt County coast, Humboldt County, California14 objects
- CA-Hum-169 (Tsurai), Humboldt County, California13 objects
- Trinidad Bay, Humboldt County, California13 objects
- Trinidad, Humboldt County, California13 objects
- Contra Costa County, California12 objects
- Marin County, California11 objects
- Richmond, Contra Costa County, California11 objects
- CA-CCo-295, Richmond, Contra Costa County10 objects
- Marina Bay, Richmond, Contra Costa County10 objects
- Northeastern California10 objects
- CA-Ala-309, Emeryville, Alameda County8 objects
- Emeryville, Alameda County, California8 objects
- Shasta County, California8 objects
- San Luis Obispo County, California7 objects
- CA-Sha-47 (Redding Mound #1), Redding, Shasta County6 objects
- Los Osos (CDP), San Luis Obispo County, California6 objects
- Redding, Shasta County, California6 objects
- near Redding, Shasta County, California6 objects
- CA-Hum-180, Prairie Creek, Humboldt County5 objects
- CA-Mrn-76, Larkspur, Marin County5 objects