The genus Cortinarius is a large one, and contains many beautiful species. It is mainly confined to temperate regions. Not a single species has been recorded as found in Ceylon, the West Indies, or Africa, but one tropical species is found in Brazil. Nearly four hundred species have been described, and over three hundred and seventy of these belong to the United States and Europe. A few are found in the extreme southern or temperate portion of South America, and several are reported from a temperate elevation among the Himalayas. Sweden and Great Britain, with their temperate climates, claim a large proportion of the European species. Not many of the Cortinarii have been recorded as edible, and none as dangerous. The Rev. M. J. Berkeley records, however, a case of poisoning by one of the species, C. (Inoloma) _bolaris_ Pers., which though not fatal was somewhat alarming, the symptoms being great oppression of the chest, profuse perspiration, and the enlargement for two days of the salivary glands of the patient. I have seen no other statements relating to the poisonous properties of this species, and the results alluded to may have been owing to some individual idiosyncrasy. Berkeley, in his "Outlines," gives the following description of this mushroom: "Pileus fleshy, obsoletely umbonate, growing pale, variegated with _saffron-red, adpressed, innate_ scales; stem stuffed, then hollow, nearly equal, squamose, of the same color as the cap; gills subdecurrent, crowded, watery, cinnamon color. Cap 1 to 2 inches broad. Stem 2 to 3 inches long." In beech woods in September and October. The genus Cortinarius has been divided by some authors into the following six groups: (1) _Phlegmacium_, in which the cap is fleshy and viscid, the veil partial, and the stem firm and dry; (2) _Myxacium_, in which the veil is universal and glutinous, hence the cap and stem both viscid; cap thin and the gills adnate or decurrent; (3) _Inoloma_, in which the cap is fleshy, dry, and at first silky with innate fibrils; veil simple and stem slightly bulbous; (4) Dermocybe, in which the pileus is thinly fleshy, dry, and at first downy, becoming smooth; the veil single and fibrillose; flesh watery, colored when moist, stem equal or attenuated downwards; (5) Telamonia, in which the cap is moist, at first smooth or dotted with the superficial fragments of the veil, the stem ringed below, or peronately scaly from the remains of the universal veil; (6) Hydrocybe, in which the cap is thin and moist, not viscid, smooth, or covered with superficial white fibrils; stem rigid, not scaly, veil thin, occasionally collapsed in an irregular ring. These subdivisions have been designated as _tribes_ by some botanists and _subgenera_ by others, etc. To the divisions Inoloma and Phlegmacium, respectively, belong the two species illustrated in Plate XII.