History of Animals
Soon thereafter, Buffon's colleague Chevalier de Lamarck – a founder of invertebrate systematics and invertebrate paleontology – published still-more shell fossils in his "Systematics of Animals Without Backbones", (1801) and his "Natural History of Animals Without Backbones" (1815 to 1822), so as to illustrate global changes in paleogeography. Lamarck also argued that the more adaptable prehistoric invertebrates were the animals that survived environmental change – a prelude to the concept of "survival of the fittest".