GEOFFBOY SAINT-I1ILABIE, ISIDORE (1805-61), a French zoologist, son of the preceding, was born at the Jardin des Plantes, Paris, December 1G, 1805. In his earlier years he showed an aptitude for mathematics, but eventually he devoted himself to the study of natural history and of medicine, and in 1824 he was appointed assistant naturalist to his father. On the occasion of his taking the degree of doctor of medicine, September 8, 1829, he read a thesis entitled Propositions sur la monstcuosite, consideree chez l'homme et les animaux ; and in 1832-37 was published his great teratological work, Histoire generale et particuliere.des anomalies de l'organisation chez l'homme et les animaux, 3 vols. 8vo, with 20 plates, In 1829 lie delivered for his father the second part of a course of lectures on ornithology, and during the three following years he taught zoology at the Athen6e, and teratology at the Ecole pratique. He was elected a member of the academy of sciences at Paris on April 15, 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 successively inspector of the academy of Paris (1840), professor of the museum on the retirement of his -1_, J. MI LJ la J. 1 •