Bashford Dean (1867- December 1928) was an American zoologist, specializing in ichthyology, and at the same time an expert in medieval armor. He is the only person to have held concurrent positions at the American Museum of Natural History and the Metropolitan Museum of Art, where he was Honorary Curator of Arms and Armor; the Metropolitan Museum purchased his collection of arms and armor after his death, which his friend Daniel Chester French commemorated with a plaque.
Dean was born in New York City. He graduated in 1886 from the College of the City of New York, and in 1890 received his Ph.D from Columbia University, where he was an assistant for Professor John Strong Newberry and later became a professor of zoology. His studies with Newberry of the placoderms, Devonian armored fishes, eventually resulted in Dean's "Studies on fossil fishes (sharks, chimaeroids and arthrodires", published in Memoirs of the American Museum of Natural History 9.5 (1909) and other articles on the Arthroleptid frog Astylosternus robustus and on the egg capsules of Chimaera.
For his volume, Bibliography of Fishes, Dean was awarded the Daniel Giraud Elliot Medal from the National Academy of Sciences in 1921 .[1] He is also the author of Catalogue Of European Court Swords And Hunting Swords Including the Ellis, De Dino and Reubell Collections (Metropolitan Museum of Art) 1929.