Dumeril. I. Andre Marie Constant, a French physician and naturalist, born in Amiens, Jan. 1, 1774, died in Paris, Aug. 2, 1800. From 1800 to 1818 he was professor of anatomy and physiology, and subsequently of pathology, in the medical faculty of Paris. In 1825, on the death of Lacepede, whose adjunct professor he had been for 22 years, he assumed his functions as professor of herpetology and ichthyology at the museum of natural history. During four years he also lectured on natural history in the central school of the Pantheon in place of Cuvier. In his most celebrated production, L'erpetologie generate (10 vols. 8vo, with an atlas of plates, 1835-'50), which contains the first attempt at a systematic description of all known reptiles, he had Bibron as collaborator. His other principal works are Elements des sciences natu-relles (5th ed., 1848), Ichthyologie analytique (1856), and Entomologie analytique (2 vols. 4to, 1860). II. Anguste Henri Audre, son of the preceding, born in Paris, Nov. 30, 1812, died there, Nov. 12, 1871. He studied medicine, taught natural history and geology at various colleges in Paris, and in 1857 succeeded his father as professor in the museum of natural history. In 1869 he was elected as a member at large of the academy of sciences.

He wrote Des odeurs, de leur nature et de leur action physiologique (1843), Histoire naturelle des poissons (vol. i., 1865), and many disquisitions relating to reptiles and fishes.