In light of present knowledge, the relationship suggested would be difficult of proof. If _C. flaccida_ Morgan be related to the _splendens_ group at all, it must be with the form known as _S. webberi_ Rex., but it differs from this in almost every particular. It has no net, with meshes uniform or diverse; it is clear brown in color, with a tinge of red, beneath the lens; the spores are smaller, distinctly warted and with the reddish tinge of the capillitium; and in short, it seems to be a comatricha and not a stemonitis. Specimens from western Washington differ in some particulars but are apparently the same thing. Ohio, Kentucky, Washington, California; not common. 4. COMATRICHA LONGA _Peck._ PLATE VI., Figs. 2, 2 _a_, 2 _b_. 1890. _Comatricha longa_ Peck, _Rep. N. Y. Mus._, XLIII., p. 24. Sporangia crowded in depressed masses or tufts, black, long, cylindric, even, stipitate; stipe black, shining, generally very short; hypothallus well developed, black; columella black, slender, weak, generally dissipated some distance below the apex; capillitium of slender brown or dusky threads anastomosing to form an open network next the columella, but extended outwardly in form of long free slender branchlets, now and then dichotomously forked; spore-mass blue-black, spores by transmitted light dark brown, globose, spinulose, some of them faintly reticulate, about 9 mu. A very remarkable species. Rare in the west, more common, as it appears, in the eastern states. The sporangia occur in tufts about 1 or 2 cm. wide, springing generally from crevices in the bark of decaying logs, especially willow and elm, in swampy places. The sporangia are remarkable for their great length. Generally about 20-25 mm., specimens occasionally reach 50 mm.! The capillitial branches are so remote that the spores are scarcely retained by the capillitium at all. Well described and figured by the author of the species, _Forty-third Rep. N. Y. State Museum_, p. 24, Pl. 3. New York, Pennsylvania, Ohio, Iowa. 5. COMATRICHA IRREGULARIS _Rex._ 1891. _Comatricha irregularis_ Rex, _Proc. Phil. Acad._, p. 393. Sporangia crowded in flocculent tufts, very dark brown or black, semi-erect or drooping, 4-5 mm. in height, irregularly cylindric, variable, stipitate; stipe black, distinct, often one-half the total height; hypothallus well developed, brown, shining; columella central, slender, flexuous, reaching the apex, where it blends, by branching, with the capillitium; capillitium loose, open, composed of arcuate threads which radiate from the columella, and are joined together, forming a central, irregular reticulation of large meshes, brown, paler toward the surface, where the free ends are sometimes colorless; spore-mass black, spores by transmitted light brown, minutely warted, 7-8 mu.