GEOFFROY SAINT-HILAIRE, ISIDORE (1805 1861) , French zoologist, son of the preceding, was born in Paris on Dec. 16, 1805. He received his M.D. in 1824, and from 183o 33 taught zoology at the Athenee. In 1832 was published his great teratological work, Histoire generale et particuliere des anomalies de l'organisation chez l'horrme at les animaux (3 vols.). He was elected a member of the Academy of Sciences in Paris in 1833, was in 1837 appointed to act as deputy for his father at the Faculty of Sciences in Paris, and in the following year was sent to Bordeaux to organize a similar faculty there. He became suc cessively inspector of the Academy of Paris (1840), professor of the museum on the retirement of his father (1841), inspector general of the university (1844), a member of the royal council for public instruction (1845) and professor of zoology at the Faculty of Sciences (185o). He died in Paris on Nov. so, 1861.
Besides the above works, he wrote: Essais de zoologie generale (1841) ; Vie . . . d'Etienne Geo ff roy Saint-Hilaire (1847) ; Acclimata tion et domestication des animaux utiles 0849); Lettres sur les substances alimentaires (1856) and Histoire naturelle generale des regnes organiques (3 vols., 18S4-62), and various papers on zoology, comparative anatomy and palaeontology.