Schrader defined this beautiful form chiefly by its shape. This, though variable, is yet generally so far pyriform as to show distinct contraction toward the stipe. The well-defined calyculus is narrowed below and eroded or denticulate above. The cyanic tints due to the presence on the calyculus of radiating lines of purplish granules about one-half the size of the spores, the net open, uniform, the stipe rather stout, short, and distinctly furrowed, rising often from a small hypothallus--these are marks of this species. The net suggests _C. tenella_, but the latter species is much smaller, has a different stem, much longer and unfurrowed. The cup here is more nearly that of some form of _C. intricata_, but is better defined, passing into the net very abruptly by the simple intervention of projecting teeth. Apparently rare. Our specimens are from New York, through the courtesy of Dr. Rex, Virginia, North Carolina, Iowa, Oregon, Colorado, and represent, as usual a modification of the European type, _C. notabilis_ Rex. Miss Lister, _Mon., 2nd ed._, writes var. _notabilis_. Colorado forms are remarkable for dense brown coloration. 10. CRIBRARIA TENELLA _Schrader._ PLATE XVII., Fig. 5. 1797. _Cribraria tenella_ Schrad., _Nov. Gen. Pl._, p. 6. Sporangia gregarious, small, .3-.5 mm. in diameter or smaller, olivaceous or ochraceous, long-stipitate, nodding; stipe slender, dark brown or blackish, very long, reaching 6 mm., weak and flexuous; calyculus variable, sometimes well defined, brown, costate, sometimes represented by the costae only connected by a thin, transparent membrane; net well differentiated, the meshes small, irregular, the nodes small, black, more or less globular, prominent, connected by transparent threads with occasional or a few free ends; spores in mass, olivaceous-ochraceous, under the lens pallid, globose, smooth, 5-7 mu. Very common eastward and south, on the weathered surface of rotten wood. Generally easily recognized by its very long stipe, small, globose sporangium dotted with numerous small roundish nodules projecting plainly above the general surface. The obconic calyculus is always represented in the outline if not in definite structure. New England, New York, Pennsylvania, Ohio, Tennessee, Illinois, Missouri, Iowa, Canada; Toronto,--_Miss Currie._ 11. CRIBRARIA MICROCARPA (_Schrad._) _Persoon._ PLATE XVII., Fig. 4. 1797. _Dictydium microcarpum_ Schrad., _Nov. Gen. Pl._, p. 13. 1801. _Cribraria microcarpa_ Schrad., Pers., _Syn._, p. 190. 1875. _Cribraria microcarpa_ (Schrad.) Rost., _Mon._, p. 235. 1892. _Cribraria microcarpa_ Schrad., Massee, _Mon._, p. 63. 1893. _Cribraria microcarpa_ Schrad., Morg., _Myx. Mi. Vall._, p. 15. 1899. _Cribraria microcarpa_ Schrad., Macbr., _N. A. S._, p. 168. 1911. _Cribraria microcarpa_ Pers., Lister, _Mycetozoa, 2nd ed._, p. 183 (?).