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Louis François de Pourtalès
Louis François de Pourtalès (1824–1880) was an American naturalist, born at Neuchâtel, Switzerland.
==Life==
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. In 1851 he assisted in the triangulation of the Florida Reef, and from 1854 until his resignation in 1873 had special charge of the office and field work of the tidal department of the Coast Survey.
In 1873 he became custodian of the Harvard Museum of Comparative Zoology, in which he had previously been assistant in zoology. Agassiz attempted to get him a professorship.
He was the first in the United States to undertake deep-sea dredging with USC&GS George S. Blake, and was an authority on marine zoölogy. The name ''Pourtalesia'' was given to a genus of sea urchins. De Pourtales presented his extensive collections to the Harvard Museum. He was a member of the National Academy of Sciences and wrote various contributions to the Coast Survey reports, to Benjamin Silliman's ''American Journal of Science'', and to the ''Proceedings'' of the American Association for the Advancement of Science.
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