i^'*^ Cincinnati Society of A'atural History. 



usually from 3-15 mic. in width, but sometimes larger from 

 8-25 mic. The species grows scantily in this region, but I 

 have elegant specimens from Alabama, sent me by Prof. Geo. 

 F. Atkinson. 



3. Stemonitis microspora, Lister. Plasmodium white 

 Sporangia elongated, subcylindric, tapering and obtuse at the 

 apex, tapering gradually downward, growing closely crowded 

 together on a strongly-developed brown hypothallus. Stipe 

 and columella brown and smooth, tapering gradually upward 

 and reaching nearly to the apex of the sporangium, the stipe 

 shorter than the columella. Capillitiuni of slender tawny- 

 brown threads; the primary l)ranches simple or only branched 

 above, or with a few lateral anastomosing branchlets, forming 

 a rather loose network of large irregular meshes ; these sup- 

 port a superficial network of very small polygonal meshes. 

 Spores globose, even, tawny-brown, 5-6 mic. in diameter. 



Growing on old wood, bark, leaves, etc. ; very common in 

 this region. Sporangium with the stipe 7-15 mm. in height, 

 the sporangium .3-. 4 mm. in thickness, the stipe shorter than 

 the sporangium. Meshes of the superficial network 4-20 mic. 

 in width. I am indebted to Arthur Lister, Esq., of London, 

 for pointing out to me the difference between this species and 

 the Stemonitis femiginea of Fries and Rostafinski. 



4. Stemonitis ferruginea, Ehr. Plasmodium lemon- 

 yellow. Sporangia subcylindric, the apex obtuse, growing 

 closely crowded together on a thin, brown hypothallus. 

 Stipe and columella brown and smooth, tapering gradually 

 upward and vanishing beneath the apex of the sporangium, the 

 stipe much shorter than the columella. Capillitiuni of slender, 

 tawny-brown threads, which immediately branch and anasto- 

 mose, forming a dense interior network of large irregular 

 meshes, supporting a superficial network of small polygonal 

 meshes. Spores globose, very minutely warted, tawny-brown 

 in color, 7-9 mic. in diameter. 



Growing on old wood, leaves, grasses, etc. vSporangium 

 with the stipe 4-10 mm. in height, the sporangium .3-. 4 mm. 

 in thickness, the stipe much shorter than the sporangium. 

 The meshes of the superficial network varying from 6-30 

 mic. or sometimes from ia-40 mic. in width, according to the 



