Thomas Nuttall, an American naturalist, born in Yorkshire, England, in 1786, died at Nutgrove, St. Helen's, Lancashire, Sept. 10, 1859. He learned the trade of a printer, and studied natural history in the United States. He explored the great lakes and the upper branches of the Mississippi, and in 1810 ascended the Missouri as far as the Mandan villages. In 1819 he explored the Arkansas river and the neighboring regions, and published "A Journarof Travels into the Arkansas Territory " (Philadelphia, 1821). He travelled also on the Pacific coast, and published several pa-pers on the shells and plants of that region. From 1822 to 1834 he was professor of natural history in Harvard college, and curator of the botanical garden. Subsequently he returned to England, and lived on the estate of Nut-grove, bequeathed to him on condition that he should reside there. His principal works are: "Manual of the Ornithology of the United States and Canada" (2 vols. 12mo, Boston, 1834), and "The North American Sylva" (3 vols, royal 8vo, Philadelphia, 1842-'9), forming a continuation to Michaux's great work on the forest trees of North America.