130 Cincinnati Society of Natural History. 



illitium of brownish-violet threads, arising from the upper 

 part of the columella ; these branch repeatedly at a sharp 

 angle, form an intricate network of elongated meshes, termi- 

 nating at the wall in numerous short free branchlets. Spores 

 globose, minutely warted, bright brown, 12-14 mic. i'^ diam- 

 eter. 



Growing on old wood, moss, etc.. New York, Chas. H. 

 Peck. Distinguished by the pale silvery .sporangial wall and 

 the clear brown spores. 



2. Lamprodkrma arcvrionema, Rost. Sporangium small, 

 globose ; the wall dark bronze, with a silvery sheen when 

 loosened from the spores, soon breaking into scales and fall- 

 ing away. Stipe long and slender, smooth, shining and 

 black, rising from a thin hypothallus; the columella short 

 cylindric, variable in length, but not attaining the center of 

 the sporangium. Capillitium arising by division of the apex 

 of the columella into several primary branches ; these imme- 

 diately separate into numerous slender flexuous brown 

 threads, which unite and form a dense network of small 

 arcuate meshes, the ultimate branchlets not free. Spores 

 globose, even, violaceous, 6-7 mic. in diameter. See plate XI, 

 Fig. 26. 



Growing on old wood of Juglans and Carya. Sporangium 

 .3-. 5 mm. in diameter, the stipe three or four times as long. 

 The columella is somewhat variable, it sometimes forks or 

 divides immediately on entering the sporangium, at other 

 times it is longer and cylindric, with more slender primary 

 branches. The meshes of the capillitium re.semble those 

 of Arcyria, whence the name. This is the Stemonitis physa- 

 roidi's, A. & S. var. siibocncus of Lea's Catalogue. 



3. La:mprodkrm.\ violackum, Fr. Sporangium depressed- 

 globose, convex above and more or less flattened and umbili- 

 cate beneath ; the wall shining with steel or violet, blue and 

 purple tints, deciduous. Stipe short, stout, brown or black- 

 ish in color, arising from a thin, brown, common hypothallus; 

 columella cylindric, or tapering slightly to an obtu.se apex, 

 attaining the center of the sporangium. Capillitium of 

 numerous slender threads, radiating from the upper part of 

 the columella ; these threads are brown below, with a vari- 



