SUMMARY1.Isolates of an intermediate nature betweenMemnoniellavon Höhnel andStachybotrysCorda have been observed.2.Stachybotrys-likeslimy heads of elliptical to oval spores andMemnoniella-likeheads of chains of spherical spores can occur on separate phialophores on the same hypha, or separately on the two phialophores of a branched phialophore.3.Single-spore isolates of cultures exhibiting this phenomenon continue to do so, whether the single spore is of the ellipticalStachybotrystype or of the sphericalMemnoniellatype.4.Isolates stable for the characters ofMemnoniella echinatafor eight years are also reported.5.The form generaMemnoniellaandStachybotrysare considered to be valid entities.