Biologic Studies in the Sphaeriales—II

The fungi which constitute the object of this investigation are included in the Sphaeriales by Lindau (16). This order, together with the Perisporiales, Hypocreales, Dothideales, and Laboulbeniales, compose the Pyrenomycetes, an enormous assemblage of forms distinguished by the type of ascal conceptacle which is called the perithecium. The orders of the Pyrenomycetes are separated by most mycologists in the following manner. The Perisporiales comprise forms in which the perithecia remain closed or have an atypical opening. The Hypocreales have fleshy, bright-colored or colorless perithecia which, though sometimes brown, are never black and hard. In the Dothideales the asci are formed in locules in a