34 Cinciuuati Society of Natural History. 



Growing on old wood and bark in small patches of a few 

 millimeters to a centimeter or more in extent. Sporangia 

 .6-8 mm. in height by .4-.5 mm. in diameter. Tricliia Jackii, 

 Rost., is included in this species. 



II. Trichi.v ciiRYSOSPERMA, Bull. Sporangia obloug-obo" 

 void to cylindric, sessile and closely crowded on a well-devel- 

 oped hypothallus ; the wall thin, pale citron to olive-yellow, 

 smooth and shining. Mass of capillitium and spores, golden 

 to ochre-3'ellow; elaters long, simple, 6-8 mic. in thickness, 

 ending in a smooth tapering point, 3-7 mic. in length ; spirals 

 four or five, usually smooth, rarely spinulose. Spores angu- 

 larly or irregularly globose, 12-14 '^vac. in diameter. 



Growing on old wood, in small patches, one to several centi- 

 meters in extent. Sporangia 1-2 mm. in height and .5-. 6 

 mm. in diameter. This is readilj' distinguished from Triihia 

 affi)iis by the larger and differently colored sporangia. 



IV. OIvIGONEMA, Rost. Sporangia sub-globose, more or 

 less irregular, sessile and closely crowded, often in heaps, one 

 upon another, the wall thin, smooth and shining; hypothallus 

 none. Capillitium scanty, composed of elaters habituall\- 

 irregular and abnormal, intermingled with the .spores; elaters 

 simple or sometimes branched, commonly very short, but 

 varying greatl}' in length, even in the same sporangium : the 

 surface marked with faint spirals, with a few annular ridges, 

 minutely punctulate or altogether smooth. Spores globose, 

 yellow. 



The species of this genus are to be regarded as degenerate 

 Trichias. Of course, the abnormality is exhibited most 

 markedly by the elaters ; nevertheless, the sporangia of some 

 of the species have a peculiar habit of heaping themselves 

 upon each other. 



A. Surface of the spores reticulate, 

 a. Elaters icith projectiui^ rings. 



I. Oi-iGONiCMA N'lTKN.s, Lib. Sporangia sub-globose, irreg- 

 ular, sessile, closely crowded and heaped ui)on each other, the 

 wall thin, yellow, smooth and shining. Mass of capillitium 



