ferae naturae

De secretis operibus artis et naturae, et de nullitate magiae, p. 533 (Brewer).
The Mediaeval Mind (Volume II of II)|Henry Osborn Taylor
I chanced to possess an abridgement of the "Biblia naturae," the masterly work of the father of insect anatomy.
More Hunting Wasps|J. Henri Fabre
Supremum autem naturae inferioris attingitur a natura superiori.
The Catholic World; Vol. IV.; October, 1866, to March, 1867.|E. Rameur
If there is in fact no such, he is, in his high attainment, almost a lusus naturae.
The Brothers' War|John Calvin Reed

In 1750 followed his "Institutiones juris naturae et gentium."
International Law. A Treatise. Volume I (of 2)|Lassa Francis Oppenheim