Aethalium two to three cm. in greatest diameter, .5-1 cm. thick, covered with a thin, fragile, but not calcareous, greyish or brownish cortex; the spore-mass grey or violaceous-grey, firm, not at all sooty, the sporangia intricate, their walls more or less calcareous; capillitium not conspicuous; spores globose, pale purple, slightly roughened, 10-12 mu. This form has been repeatedly sent me from Denver, Colorado, by Professor Bethel. I have refrained from publishing it, still anxious to believe that all fuligos on the face of the earth were of one species. In the species next following it must be admitted that the spore-variations are too wide to remain comfortably under shelter of a single specific name. The present species is not _F. septica_, neither is it _F. megaspora_; it is _F. intermedia_. Colorado; Iowa. 5. FULIGO MEGASPORA _Sturg._ 1913. _Fuligo megaspora_ Sturg., _Col. Coll. Pub._, p. 443. Aethalium pulvinate one to three inches in diameter, covered with a thick spongy incrustation of lime, white or yellowish toward the base: sporangia convolute, the walls membranous, brittle, charged throughout with round white granules of lime, 1.5-2 mu in diameter: columella none: capillitium of delicate, colorless, anastomosing tubules, bearing toward the center large, white, branching calcareous nodules; spores spherical, or somewhat oval, dark purple-brown, rough-tuberculate, 15-20 mu. This species differs as pointed out by Professor Sturgis, chiefly in the character of the spores, their unusual size and roughness.[18] Colorado; Africa!--_Robert Fries._ =EXTRA-LIMITAL= =Erionema= _Penzig_ 1898. _Erionema_ Penzig, _Die Myx. d. Fl. v. Beutenzorg_, p. 36. Sporangia plasmodiocarpous but distinct, cylindrical; capillitium intricate, elastic; nodules few. 1. ERIONEMA AUREUM _Penzig_ 1898. _Erionema aureum_ Penz. _l. c._ Sporangia elongate, clustered, pendulous, yellow or grayish yellow, generally stipitate on long flaccid stalks, or sessile and interlacing: stipes yellow, blending with the hypothallus; capillitium intricate, expanding at maturity after the manner of _Arcyria_ to several times the sporangial length, the nodules small, yellow; spores nearly smooth, violaceous-brown, 5-6 mu. This unique form is near the fuligos which it resembles, especially when sessile, in its intricate sporangia. The spores also are those of the common _Fuligo septica_. The habit is however entirely different. Mr. Fetch describes clusters in Ceylon, hanging free, four to six cm. in length! =2. Badhamia= (_Berkeley_) _Rost._ 1852. _Badhamia_ Berkeley, _Trans. Linn. Soc._, XXI., p. 153. 1875. _Badhamia_ Rostafinski, _Monograph_, p. 139.