Address, report, and other materials (perhaps reference materials) concerning Erdman's collecting activities in the Persian Gulf region and fishes, marine life, and freshwater life in the Persian Gulf region and in Jidda on the Red Sea. Erdman's address and report appear to be unpublished. The address lists specimens preserved, presents facts about the Gulf (e.g. temperatures, tide), and discusses collecting methods. The report summarizes the purpose of Erdman's trip, discusses the localities in which he collected, summarizes activities and collections, and summarizes results. Reference materials may be extracted from published leaflets and other materials. A map of the area Erdman collected in is included.