New York, Pennsylvania, South Carolina, Missouri, Iowa; Black Hills, South Dakota. 15. CRIBRARIA LANGUESCENS _Rex._ 1891. _Cribraria languescens_ Rex, _Proc. Phil. Acad._, p. 394. Sporangia scattered, very minute, .25-.35 mm., spherical, long-stipitate, drooping; stipe 2.5-3 mm., slender, flexuous, subulate, rugulose; calyculus about one-third the sporangium, reddish brown, shining, minutely striate with granular lines, the margin more or less regularly serrate; net reddish brown, the meshes triangular and the threads simple, the nodes large, polygonal, flat, but well differentiated; the spores when fresh dull red in mass, paling with age; by transmitted light colorless, 6 mu, smooth. A very singular species, easily recognizable by its long, slender stipes, terminating in exceedingly small spherical sporangia. The colors are obscure, but the striations on the calyculus are violet-tinted, and the reds perhaps predominate elsewhere. "In its scattered and solitary growth, its tall, slender stipes, and relaxed habit it resembles _C. microcarpa_, in its network it approaches _C. tenella_, and its spores have the color of the paler form of _C. purpurea_." So Dr. Rex, _l. c._ Western forms of the first-named species have much shorter stipes; the network in the specimens before us is unlike that of _C. tenella_, but resembles that of _C. purpurea_. Rare, on very rotten wood, in the forest. New York, Ohio, South Carolina, Ontario. 16. CRIBRARIA CUPREA _Morgan._ PLATE XVII., Fig. 7. 1893. _Cribraria cuprea_ Morg., _Jour. Cin. Soc_., p. 16. Sporangium very small, .33 mm., oval or somewhat obvoid, copper-colored, stipitate, nodding; stipe concolorous or darker below, subulate, curved at the apex, 2-4 times the sporangium; calyculus about one-half the sporangium, finely ribbed and granulose within, the margin nearly even; the net rather rudimentary, the meshes large, triangular or quadrilateral, the nodules also large, flat, concolorous, the threads slender, transparent, with free ends few; spores in mass copper-colored, by transmitted light colorless, smooth, 6-7 mu. Recognizable by its small size and peculiar color, that of bright copper, although this fades somewhat with age, and the metallic tints are then lacking. Related to the preceding and in specimens having globular sporangia closely resembling it; but the ground color in _C. languescens_ is always darker, and the stipe proportionally much longer. In habit the sporangia are widely scattered, much more than is common in the species of this genus. Miss Lister, _2nd ed._ regards this as a var. of No. 15. Comparatively rare. Before us is one very small colony of sporangia from Iowa, one from Ohio, and a large number from Missouri. If one may judge from the material at hand, the favorite habitat is very rotten basswood, _Tilia americana_. =2. Dictydium= (_Schrad._) _Rost._