Agaricus 1. In the Shale, Pth. Duncanser, 8 June 1839. Aggregate and clustered. Stems comparatively contracted at the base, expanded at the top, and slightly flattened. Pale brown, whitish at the margin. Stem highly curved, fistulose, fine, very pale brown, covered with a whitish farina, elevated above, tub bulbous, rising from a dense mass of brownish white branching, twisted fine fibers. Gills adnate, watery brown, of light brownish black and faint purpure. Stem colorless and translucent, excessively minute; Pileus scarcely exceeding 3 inch in diameter, incumbent hyphae, number: the dark angular depressions; with a very white; in its fresh state with a thick brown band near the margin, the margin strong whitish and incurved; as it dries, it becomes much paler a brownish-white, fifty white, and more uniform in color. Stem nearly 2 inches high, barely rising clothed together, firm, becoming thick like, but a shallow groove in the center; externally covered with scales, and by length gradually splitting. The stem appears disproportionally thick to the pileus, it bears. Pileus by drying becomes somewhat concave in lustre. The spores that from the foot full pores seldom were transparent and colorless, left a black of the microscopic part dry affixed adjacent and were transverse brownish-black. 2. In the main bed, Duncanser Garden June 14th 1839. Pileus 2 inches broad, at length nearly flat; with a thin band near the margin; color of the pileus during a rainy day a pale shining brown; gills and stalk much wrinkled on the second day. Stem splitting near the base; in the third day the brown band disappeared.