Claus, a learned Swedish physician, born of an ancient and noble family in 1630. He became professor of medicine at Upsal, where he acquired great applause by his extensive knowledge; and died in 1702. His principal works are, 1. Exercitatio anatomica, exhibens ductus novos hepaticos aquosos, et vasa glandularum ferros, in 4to. He there affirms his claim to the discovery of the lymphatic vessels, against the pretensions of Thomas Bartholin. 2. Atlantica, five Manheim, vera Japhetii posterorum sedes ac patria, 4 vols folio, is full of strange paradoxes supported with profound learning: he there endeavours to prove, that Sweden was the country whence all the ancient Pagan divinities and our first parents were derived; and that the Germans, English, French, Danes, Greeks, and Romans, with all other nations, originally came from thence.