Terrapene clausa from Bell’s A monograph of the Testudinata by University of Glasgow Library on Flickr.
“Thomas Bell: A Monograph of the Testudinata
London: 1832-1836
Sp Coll f276A pioneering dental surgeon by profession, Thomas Bell was also an eminent zoologist who was an expert on crustaceans. His Monograph of the Testudinata is said to the first comprehensive account of tortoises. Bell aimed to describe all known species for the first time, including newly discovered varieties.”
(via scientificillustration)