Cuvier played a leading part in the development of paleontology and stimulated the study of comparative anatomy. He ranks with von Baer as one of the founders of modern morphology. Vols. 1-2 ed. by C. Duméril, and vols. 3-5 ed. by G.L. Duvernoy, but Cuvier took full responsibility for the contents of this work. The posthumous second edition, revised and expanded by Georges Cuvier's younger brother, Georges-Frédéric Cuvier  to 8 vols., appeared from 1835-1846.