PAOLO** (afterwards STYIO), a celebrated Sicilian naturalist, born at Palermo A.D. 1633. After he had gone through the usual course of study, he was ordained priest, and entered into the Cistercian order. For the sake of improving his knowledge in natural history, he travelled over Sicily, Malta, Italy, the Low Countries, England, France, Germany, Poland, and several other countries; and in 1696 was admitted a member of the Academ. Curiosar Naturar, in Germany. Upon his return to Sicily, he retired to the convent of Sta. Maria d'Altifonte, near Palermo, where he died in 1704. He left many curious works, some of which have gone through several editions. The following in particular may be mentioned, 1. *Recherches et Observations Naturelles touchant le Corail, la Pierre Etoilée, et l'Embrasure du Mont Etas*; 2. *Museo di Fisica e di Esperienza*; 3. *Osservazioni Naturali*; 4. *Della Pietra Belzunna minerale Siciliana*; 5. *Appendix ad Museum de Plantis Sicilis*.