This database contains records related to about 500,000 lots maintained in the malacology department. at the Academy of Natural Sciences of Philadephia. These records are derived from detailed computer records for material entering the collection since 1976, and records digitized from the handwritten catalogues, which were started in 1889. an inventory started in 2011 that has recorded the current placement in the collection of more than 412,000 lots, and images of specimens and labels, particularly for type lots. This material is based upon work supported in part by the National Science Foundation under grant numbers DEB-9249109, DEB-9408267, DEB-9616621, DBI-9728996, DBI-1203605, DBI-1902328, and DBI 2001570. Any opinions, findings, conclusions or recommendations presented in this material are only those of the grantees and do not necessarily reflect the views of the National Science Foundation.