Several kinds of funguses, and the spawn of the truffle, emit a phosphorescent light; of the first, the Agaricus olearius, not uncommon in Italy, is sometimes seen at night, feebly shining amidst the darkness of the olive grove. The coal-mines near Dresden have long been celebrated for the production of funguses which emit a light similar to a pale moonlight. Mr. Drummond describes an Australian fungus with similar properties; and another very interesting one, an Agaric, is noticed by Mr. Gardner, in his ‘Travels in Brazil.’[44]