French naval officer.

Garde (1741), lieutenant de vaisseau (1756), capitaine de vaisseau (1771) in the French navy. Chevalier de Saint-Louis. Member of the Académie des sciences (1758). Served in the comte d’Estaing’s squadron (1778-79) and in the comte de Grasse’s squadron (1781) in the Revolutionary War. Chef d’escadre (1782). Inspecteur général des cartes, plans, et journaux (1786). Vice- admiral (1792). Emigrated to England (c. 1792-1802). Wrote several scientific essays and travel accounts.