1753-1803 1772-1844 1769-1 18th century animal artiodactyla artiodactyl bactrian camel baron georges léopold chrétien frédéric dagobert baron georges léopold chrétien frédéric dagobert cuvier camelidae camelus camel camelus bactrianus cuvier double drawing epitheria etienne eutheria even toed - Alamy