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An American zoologist and geologist, son of J. L. R. Agassiz; born in Neuchatel, Switzerland, Dec. 17, 1835. He came to this country with his father in 1849; graduated from Harvard in 1855; and received the degree of B. S. from the Lawrence Scientific School in 1857. In 1859 he went to California as assistant on the United States Coast Survey. From 1860 to 1865 he was assistant curator of the Museum of Comparative Zoology at Harvard University; and from 1866 to 1869, superintendent of the Calumet and Hecla mines, Lake Superior. On the death of his father in 1873, he was appointed curator of the Museum of Comparative Zoology, holding that position until he resigned in 1885. His chief works are: "List of Echinoderms" (1863); "Exploration of Lake Titicaca" (1875-76); "Three Cruises of the Blake, a Contribution to American Thalassography" (1880).