1862. _Reticularia carestiana_ Rabenh., _MS. Fung. Eur. exsic._, No. 436. 1875. _Lepidoderma carestianum_ (Rabenh.) Rost., _Mon._, p. 188. 1891. _Amaurochaete minor_ Sacc. & Ell., _Mich._, II., p. 566. Fructification in the form of flat, pulvinate plasmodiocarps, or, anon, sporangiate, the sporangia sessile, sub-globose, ellipsoidal, elongate, irregular, confluent, yellowish-grey, the peridium covered more or less completely with dull white, crystals or crystal-like scales; columella, where visible, yellowish-brown, calcareous; capillitium, coarse, rigid, more or less branched and united, or colorless, delicate, forming a definite net; spores distinctly warted, purple 10-12 mu. This is a most remarkable species. The sporangiate forms little resemble those distinctly plasmodiocarpal. In the former the calcic scales and crystals are distinct and quite as in _L. tigrinum_; in the latter they are cuboid, irregular. The wall of the peridium in the plasmodiocarps at hand is black, and the covering accordingly shows white; in the sporangial forms the wall is brown, and the scales have a yellow tinge as if tinged with iron. In the sporangial presentation the capillitium is intricate delicate; in the plasmodiocarp, rigid, dark-colored, etc. This looks like a didymium and in so far justifies the opinion of earlier students. Fries, of course, includes all these things with the didymiums, and _D. squamulosum_ probably often sheltered them under extended wing. _Didymium granuliferum_ Phill., _Grev._, V., p. 114, from California is by European authors referred here. The capillitium carries calcareous crystalline deposits in special vesicles and the spores show remarkable variation in unusual size--15-30 mu.[1] Should probably be entered _Lepidoderma granuliferum_ (Phill.) Fr., spores 15-18 mu.[34] Utah,--Harkness. 3. LEPIDODERMA CHAILLETII _Rost._ PLATE XVIII., Figs. 6, 6 _a_, 6 _b_. Sporangia distinct, coalescent or plasmodiocarpous, large, when isolated 1-1.5 mm., dull drab in color, very sparsely sprinkled with white tetrahedral or irregular scales; the peridium thin, more or less translucent, rugulose, dull brown, persistent; columella none; capillitium abundant, under the lens purple-brown, sparingly branched, even, stout, rigid, no calcareous deposits nor vesicles; spores 8-10 mu, minutely warted, fuliginous. Yosemite Canyon, California, _Prof. B. Shimek._ This is, no doubt, similar to _L. carestianum_ but differs in the size and habit of the sporangia, and in the fact that the capillitium is uniform throughout, whatever the style of fructification, and in the size, color, and surface characters of the spore. Evidently not _Didymium granuliferum_ Phill. Both will, no doubt, be again collected, and we shall then have much needed light.