Geoffroy Saint-Hilaire, Étienne
Geoffroy Saint-Hilaire, Étienne(ātyĕn` zhôfrwä` săNtēlĕr`), 1772–1844, French zoologist. He was professor at the Museum of Natural History (1793–1840) and also at the Faculty of Sciences (from 1809), both in Paris, and was a member (1798–1801) of Napoleon's scientific staff in Egypt. He expressed in his Philosophie anatomique (2 vol., 1818–22) and in other works the theory that all animals conform to a single plan of structure. This attracted many supporters but was strongly opposed by CuvierCuvier, Georges Léopold Chrétien Frédéric Dagobert, Baron
, 1769–1832, French naturalist, b. Montbéliard, studied at the academy of Stuttgart. From 1795 he taught in the Jardin des Plantes.
..... Click the link for more information. , who had been his friend, and in 1830 a widely publicized debate between the two took place. Some of Geoffrey Saint-Hilaire's ideas have been confirmed by modern developmental biologists. His son, Isidore Geoffroy Saint-Hilaire, 1805–61, also a zoologist, was an authority on deviation from normal structure. He succeeded to his father's professorships.