GIRARD, Charles, naturalist, born in Mulhausen, France, 9 March, 1822. He was educated in Neuchatel, Switzerland, where he was the pupil and assistant of Agassiz. He followed his teacher to the United States in 1847, remaining with him until 1850 when he removed to Washington, D.C., and attached himself to the Smithsonian institution. In 1852 he was naturalized as an American citizen. He was graduated at the medical school of Georgetown, D. C., in 1856, remained in the Smithsonian institution until 1859, and for some time was engaged with Professor Baird in the investigation of reptiles, His publications are " Maremalia," in the "Iconographie Encyclopaedia of Science, Literature, and Art" (New York, l851) ; "Monograph of the Cottoids" (Washington, 1851) ; "Reptiles" (in collaboration with Professor Spencer P. Baird) in Stansbury's " Exploration and Survey of the Great Salt Lake of Utah " (1853) ; " Bibliographia Americana historieo naturalis" (1852) ; "Catalogue of North American Reptiles in the Museum of the Smithsonian Institution--Part I., Serpents," in collaboration with Professor Baird (1853); "Researches upon Nelnerteans and Planarians--I., Embryonic Development of Planocera elliptiea" (Philadelphia, 1854);" Life in its Physical As peets " (Washington, 1855) ; "Reptiles, Fishes, and Crustacea," in Gilliss's " United States Naval Astronomical Expedition to Chili" (1856) : "Herpetology of the United States Exploring Expedition under the Command of Captain Wilkes" (1858); "General Report upon Fishes," in "United States Explorations and Surveys for Railroad Routes from the Mississippi River to the Pacific Ocean" (1859); and " Report upon Fishes," in Emory's "Survey of the United States and Mexican Boundary" (1859).