This classification is made on the plan presented in the "Encyclopedia Britannica," and includes genera and species not included there, especially of North America and particularly the fresh water fish of Pennsylvania and New York states, ca. 1866-1879. Also included are many illustrations of specimens.

This small group of manuscript collections also includes correspondence and lists of plants.

This is a miscellaneous collection of manuscripts (ca. 35 items) from the British Museum, selected for filming by Whitfield J. Bell, Jr. Included are letters, botanical lists, illustrations, and other types of documents.