Photostats of plates of Pleurotomacia and Gastripoda used for illustration of "The Voyage of H.M.S. Challenger" by Sir Thompson, 1873, Box: 5, Folder: 11. Gilbert Harris papers, 14-5-4663. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/1932704 Accessed August 30, 2026.