James Dwight Dana (1813-1895)

American geologist. Along with Gray, Dana was one of Darwin's correspondents in the U.S. and supported Darwin's theory of the development of coral reefs. Although Dana was best-known for running the American Journal of Science and for his geological work, he also wrote on biological topics; he described crustacea and fossils from the Australian coal measures collected during the Wilkes Expedition, and argued for a "principle of cephalization" (1864) as a means of ordering biological diversity (with "cephalized" forms on top).

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