Donor
- Ronald Leroy Olson1,909 objects
- University Appropriation1,187 objects
- Phoebe Apperson Hearst634 objects
- G. M. Stirling402 objects
- Santa Barbara Museum of Natural History402 objects
- Willard W. Hill402 objects
- Albert Mohr364 objects
- Adán Eduardo Treganza189 objects
- University of California, Los Angeles189 objects
- Frederic Ward Putnam98 objects
- James Allan Bennyhoff76 objects
- National Park Service68 objects
- River Basin Survey68 objects
- Blanche Trask61 objects
- Richard Coxe32 objects
- Winthrop Coxe32 objects
- Museum of Paleontology (UC Berkeley)11 objects
- Thomas T. Waterman8 objects
- Jeremiah B. Lillard7 objects
- Rand McNally Company7 objects