1. Shell fragments Bookmark Museum number: 1-213163 Object class: Fragments (object portions) and Shell samples Collector: Francis A. Riddell Collection place: CA-Yol-13 (Mustang Mound), Yolo County, California Collection date: 1958 Taxon: Olivella
2. Shell fragments Bookmark Museum number: 1-211925 Object class: Fragments (object portions) and Shell samples Collector: Francis A. Riddell Collection place: CA-Yol-13 (Mustang Mound), Yolo County, California Collection date: 1958 Taxon: Olivella
3. Shell fragments Bookmark Museum number: 1-258595 Object class: Fragments (object portions) and Shell samples Collector: Francis A. Riddell Collection place: CA-Yol-13 (Mustang Mound), Yolo County, California Collection date: 1958 Taxon: Olivella
4. Shell fragments Bookmark Museum number: 1-258607 Object class: Fragments (object portions) and Shell samples Collector: Francis A. Riddell Collection place: CA-Yol-13 (Mustang Mound), Yolo County, California Collection date: 1958 Taxon: Olivella