Paul Louis (Louis) de Coulon (Louis Coulon) (1804–94)

Swiss naturalist. Friend of Louis Agassiz, whom he helped to establish at Neuchâtel. Director of the Musée d’Histoire Naturelle at Neuchâtel, founded by his father in 1837, until his own death. President of the Societé Neuchâteloise des Sciences Naturelles for more than fifty years.