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- Museum number:
- 1-205491
- Collector:
- Francis A. Riddell
- Collection place:
- Madeline Plains, Lassen County, California
- Collection date:
- unknown
- Museum number:
- 1-205492
- Collector:
- Francis A. Riddell
- Collection place:
- Madeline Plains, Lassen County, California
- Collection date:
- unknown
- Museum number:
- 1-202952
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-10, Buckhorn Canyon, Lassen County
- Collection date:
- 1940
- Museum number:
- 1-202953
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-10, Buckhorn Canyon, Lassen County
- Collection date:
- 1940
- Museum number:
- 1-202951
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-10, Buckhorn Canyon, Lassen County
- Collection date:
- 1940
- Museum number:
- 1-103783
- Collector:
- Francis A. Riddell and Harry Starr Riddell Jr.
- Collection place:
- CA-Las-9 (Madeline Dunes site), Madeline Plains, Lassen County
- Collection date:
- 1948
- Museum number:
- 1-202954
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-10, Buckhorn Canyon, Lassen County
- Collection date:
- 1940