Terrapene clausa - a pioneering dental surgeon by profession, thomas bell was also an eminent zoologist who was an expert on crustaceans. He became professor of zoology at king's college in london in 1835 and was a founder member of the zoological society of london. 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. Date: between 1832 and 1836.
