T,2 Cinciutiaii Society of Natural History. 



a verj' long flexuous point, 14-18 mic. in length; spirals 

 three or four, winding evenly and closely, perfectly smooth. 

 Spores globose, minutely warted, 10-12 mic. in diameter. 



Growing on the inside of bark of Acer. Sporangium .4-. 5 

 mm. in diameter. The capillitium is deep orange and the 

 spores olivaceous, but this difference in shade of color 

 between spores and capillitium occurs in other species. 

 Trichia advetmla, Mass., is a closely related species, the 

 swellings in the elaters having no specific value. 



7. Trichia inconspicu.v, Rost. Sporangia very small, 

 subglobose, sessile, collected together in clusters, or scattered, 

 without any hypothallus ; the wall brown, smooth and shin- 

 ing. Mass of capillitium and spores yellow ; elaters long, 

 simple, cylindric, 3-4 mic. in thickness, ending in smooth 

 tapering points, 6-7 mic. in length; spirals three or four, 

 close, not prominent, perfectly smooth. Spores globose, 

 minutely warted, 10-12 mic. in diameter. 



Growing on bark of Platanus, etc. New York, Peck; 

 Iowa, McBride. The sporangia spherical or reniform and 

 very small. 



b. Elaters spinii'osc. 



8. Trichia Iowknsis, McBride. Sporangia subglobo.se, 

 sessile, gregarious, scattered, or sometimes close and con- 

 fluent ; the wall thickened with minute scales, reddish brown 

 in color. Mass of capillitium and spores yellow ; elaters 

 quite variable, usually very long, but sometimes very short, 

 simple, rarely branched, the thickness unequal, 3-4 mic. in 

 the same elater, with occasional thicker swellings, bearing 

 numerous scattered spines, usually about as long as the thick- 

 ness of the elater, but sometimes much longer, those at the 

 ends being similar; spirals three or four, fine and close, in 

 places nearly obsolete. Spores globose, or more or less irreg- 

 ular, minutely warted, g-ii mic. in diameter. 



Growing on old bark of Populus ; Iowa, McBride. Sporan- 

 gia .4-. 5 mm. in diameter. This is a very curious species of 

 Trichia; it suggests Ophiothcca J fV/;' /////, but the elaters are 

 short and simple, and there is no cjucstion as to the spirals 

 upon them. I could fuul no branched elaters in my specimen. 



