Lonis Angustin Guillanme Bosc, a French naturalist, born in Paris, Jan. 29, 1759, died there, July 10, 1828. He held public offices until the reign of terror, when he sought refuge in the forest of Fontainebleau. He visited the United States in 1796-'8, and contributed much toward diffusing in France a better knowledge of American natural history. He was for some time chief director of prisons, went on missions to Italy and to the wine districts of France, edited an agricultural cyclopsedia, wrote extensively for various publications on natural history, with all branches of which he was singularly conversant, and became professor at the zoological garden of Versailles, afterward of Paris, and member of the academy. He acquired additional celebrity by his devotion to his former official chief Roland, and to Mme. Roland, whose memoirs he saved from destruction. After having been the tutor of Mile. Roland, he became her guardian at the request of her parents, adopted her as his daughter, and recovered for her the confiscated property of her family.

His chief works are: Histoire naturelle des coquilles (5 vols., 2d ed., Paris, 1824); Histoire des vers et des crustaces (2 vols., 2d ed., 1829); and his elaborate and renowned descriptions of the French wine districts.