METHODICAL DISTRIBUTION OF THE BRITISH ESCULENT FUNGUSES.
The primary division of Funguses into Hymenomycetes and Gasteromycetes is founded upon the position of their seed, which lies, as we have seen, externally in the first, and internally in the members of the second. The funguses described in the present work belong chiefly to the first division, Hymenomycetes; to Tribe 1, Pileati; and many of them to Genus 1, Agaricus. This genus includes a great variety of species, and is distinguished from all other genera by having a fleshy pileus furnished underneath with gills, which are placed at right angles to the stem. Some species, during their infancy, are enclosed either in one or more membranes.