Note 44 — PHOSPHORESCENCE.

“One dark night, about the beginning of December, while passing along the streets of the Villa de Natividade, I observed some boys amusing themselves with some luminous object, which I at first supposed to be a kind of large fire-fly; but, on making inquiry, I found it to be a beautiful phosphorescent fungus, belonging to the genus Agaricus, and was told that it grew abundantly in the neighbourhood, on the decaying leaves of a dwarf palm. Next day I obtained a great many specimens, and found them to vary from one to two and a half inches across. The whole plant gives out at night a bright phosphorescent light, of a pale greenish hue, similar to that emitted by the larger fire-flies, or by those curious, soft-bodied, marine animals, the Pyrosomæ; from this circumstance, and from growing on a palm, it is called by the inhabitants ‘Flor do Coco;’ the light given out by a few of these fungi in a dark room, was sufficient to read by. It proved to be quite a new species, and, since my return from Brazil, has been described by the Rev. M. J. Berkeley under the name of Agaricus Gardneri, from preserved specimens which I brought home.”—Travels in the Interior of Brazil, 1846.