Growing on rotten wood, mosses, etc. Sporangium .5-.7 mm. in diameter, the stipe three to five times as long. This is a much larger species than the preceding; it has a uniform dark purple hue, the stipe is very long and much bent and twisted, the ribs of the sporangium are soon torn apart and rolled inward. EXPLANATION OF PLATE III Fig. 1.--Licea biforis, Morgan, n. sp. Figs. 2, 3, 4.--Diagrammatic representation of the structure of Tubulina Fig. 5.--Lycogala conicum, Pers., natural size Fig. 6.--Lycogala exiguum, Morgan, n. sp., natural size Fig. 7.--Lycogala epidendrum, Buxb., natural size Fig. 8.--Lycogala flavofuscum, Ehr., natural size Fig. 9.--Portion of tubule of Lycogala flavofuscum Fig. 10.--Reticularia splendens, Morgan, n. sp., natural size Fig. 11.--Cribraria cuprea, Morgan, n. sp. Fig. 12.--Dictydium longipes, Morgan, n. sp. [Illustration: The Journal of the Cin. Soc. Natural History. VOL. XV. PLATE III.] * * * * * From the Journal of the Cincinnati Society of Natural History, April, 1893. THE MYXOMYCETES OF THE MIAMI VALLEY, OHIO. BY A. P. MORGAN. Second Paper. (Read May 2, 1893.) ORDER III. PERICHÆNACEÆ. Sporangia sessile or plasmodiocarp; the wall a thin membrane, with a more or less thickened outer layer of minute brownish scales and granules. Capillitium of long and very slender tubules, proceeding from numerous points of the sporangial wall, loosely branched, forming no evident network, the surface minutely warted or spinulose. Spores globose, oval, or somewhat irregular, yellow. The order is distinguished by the sessile sporangia, with thick brown walls, and the very slender threads of the capillitium, with irregular and indefinite markings. TABLE OF GENERA OF PERICHÆNACEÆ. 1. PERICHÆNA. Sporangia more or less depressed, roundish or more commonly polygonal and irregular, dehiscent in a circumscissile manner. 2. OPHIOTHECA. Plasmodiocarp terete and more or less elongated, bent and flexuous, sometimes annular or reticulate, irregularly dehiscent. I. PERICHÆNA, Fr. Sporangia more or less depressed, roundish or more commonly polygonal and irregular, the edges approximate and sometimes confluent; the wall a thin membrane, with a thick dense yellow-brown outer layer of minute scales and granules, becoming darker at the surface, dehiscent in a circumscissile manner. Capillitium of very slender loosely-branched threads, with the surface minutely warted. Spores globose, oval or somewhat irregular, yellow. Distinguished from Ophiotheca by the flattened sporangium with a regular circumscissile dehiscence.