Record group consists mostly of correspondence and a variety of departmental records. It is divided into seven series: Invertebrate Paleontology Department correspondence, Invertebrate Paleontology Department photographs, accounts payable and accounts receivable books, financial records, specimen inventory lists, letters of reference, and Committee on the Devonian Catalogue records.
These records are partially arranged chronologically in five boxes. The two account books (which comprise one box) contain receipts dated 1922-1948. The rest of the material in the other four boxes is dated 1935-1956. The total year span of the fonds is 1922-1956.
This is by no means a complete set of records of the Invertebrate Paleontology Department as the department under various names and incarnations dates back to 1892 and continues beyond 1956 to the present.
Acession 2016-026 consists of two rolls of microfilm which are a reproduction of the initial catalogue of artifacts. A paper copy of this catalogue is currently used by the Department.