Pierre, one of the greatest surgeons of the eighteenth century, was born at Paris. During the reign of Louis XVI, he was appointed anatomical demonstrator in the Jardin des Plantes. His earliest publication is entitled Anatomie de l'Homme, suivant la circulation du sang, et les nouvelles découvertes, 8vo, 1690, and has been frequently reprinted. It was translated into the Tartar dialect by a Jesuit, for the use of Kang-hi, emperor of China. In another work, published in 1698, entitled Dissertation Historique et Physique sur la Génération de l'Homme, he supports the ovarian hypothesis. In 1707 he published a work on surgery, entitled Cours d'Opérations de Chirurgie, 8vo, which was several times reprinted; and was afterwards edited with notes by Lafayette, in two vols. This treatise was long received as a standard book on the subject. He also wrote Dissertation sur la Mort Subite, 12mo, published in 1709, and a Traité Générale des Accouchements, 1718, 8vo. The last is little more than an abridgment of Mauricéan's work on the same subject. Dionis died at Paris Dec. 11, 1718.