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Start Over You searched for: Collector Francis A. Riddell Remove constraint Collector: Francis A. Riddell Collector Harry Starr Riddell Jr. Remove constraint Collector: Harry Starr Riddell Jr. Donor Harry Starr Riddell Jr. Remove constraint Donor: Harry Starr Riddell Jr. Taxon Castor canadensis Remove constraint Taxon: Castor canadensis

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1. Beaver tooth

2. Mammal tooth

3. Tooth