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Darwin, Charles (1845). Journal of Researches into the Natural History of the Countries visited During the Voyage of H.M.S. Beagle Round the World, 2nd edition. John Murray.
Cox, Ian. Ed. (1957). The Scallop; Studies of a shell and its influences on humankind. London; Shell, 135pp. HB. Shell.
Maury, MF. (1860). The Physical Geography of the Sea and its Meteorology; being a reconstruction and enlargement of the Eighth Edition of “The Physical Geography of the Sea”. London:. Sampson Low.