 Louis François de Pourtalès

Louis François de Pourtalès (4 March 1824 – 17 July 1880) was an American naturalist, born at Neuchâtel, Switzerland.He was a pupil of Louis Agassiz, whom he accompanied in 1840 on glacial expeditions in the Alps and in 1847 to the United States, where in 1848 he entered the government Coast Survey.