The Myxomycetcs of the Miami Valley, Ohio. 131 



able outer portion colorless ; they branch a few times and 

 form an interior network of elongated meshes, outwardly 

 arching and freely anastomosing they give rise to an external 

 network of small irregular meshes, they then attain the wall 

 by innumerable short, simple, or forked free branchlets. 

 Spores globose, minutely spinulose, violaceous, 9-1 1 mic. in 

 diameter. See plate XI, Fig 27. 



Growing on old wood, mosses, etc., late in Autumn. Spo- 

 rangium .5-. 8 mm. in diameter, the stipe about the same 

 length. The capillitiuni is sometimes most of it colorless 

 and flaccid ; sometimes it is all brown and rigid except the 

 minute free extremities. 



4. Lamproderm.v arcyrioides, Somm. Sporangium 

 globose or ellipsoid, and somewhat elongated ; the wall with 

 tints of violet, purple, and blue, deciduous. Stipe usually 

 short, or sometimes nearly obsolete, brown or blackish in 

 color, arising from a strongly - developed hypothallus ; the 

 columella cylindric or slightly tapering upward, and obtuse, 

 reaching nearly to the center of the sporangium. Capillitiuni 

 of numerous pale-brown threads, radiating from the apex of 

 the columella ; these fork directly from the base, are bent 

 and flexuous, and are combined into a dense, intricate net, 

 with abundant free extremities. Spores globose, spinulose, 

 violaceous, 13-16 mic. in diameter. 



Growing on old leaves, wood, etc. Sporangium .5-. 8 mm. 

 in diameter, the stipe variable in length from very short to 

 I mm. long or beyond. Lamproderma columbinum , Pers. is 

 a doubtful species, the forms of that name being easil}- dis- 

 tributed between the present species and L. physaroidcs. 



5. lyAMPRODERMA sciNTiLLANS, B. & Br. Sporangium 

 globose ; the wall shining with colors of blue, purple, and 

 bronze, deciduous. Stipe long, slender, smooth, and shining, 

 brown or blackish, rising from a thin, brown, common hypoth- 

 allus ; columella cylindric or slightly tapering to the obtuse 

 apex, not reaching the center of the sporangium. Capillitium 

 of numerous brown threads, originating about the apex of 

 the columella ; these fork several times, with few anastomos- 

 ing branchlets, and terminate at the wall in long, free extrem- 

 ities. Spores globose, minutely warted, violaceous, 7-9 mic. 

 in diameter. See Plate XI, Fig. 28. 



