Simone Majoli (1520 – 9 January 1597) was an Italian canon lawyer, bishop and author. His encyclopedic work Dies caniculares (Dog days), covered a wide range of topics in natural history, demonology and other subjects such as werewolves. First published in 1597, it ran to several later editions. He is mentioned in the early history of the explanation of fossils, by Charles Lyell, as a pioneer of volcanic explanations.