The Myxomycetes of the Miavii I'allcy, Ohio. 33 



9. Trichia scahra, Rost. Sporaiif^ia globose or somewhat 

 irregular, sessile and closely crowded on a well-developed 

 hypothallns ; the wall thin, gold-yellow or orange to yellow- 

 brown in color, smooth and shining. Mass of ca]nllitium and 

 spores orange or golden-yellow ; elaters long, simple, 4-5 mic. 

 in thickness, ending in a smooth tapering point, 5-H mic. in 

 length ; spirals three or four, covered with numerous short 

 acute spinules. Spores globose, minutely warted, 9-1 1 mic. 

 in diameter. See Plate I, Fig. 23. 



Growing on old wood in patches, sometimes several centi- 

 meters in extent. Sporangia .6-1 mm. in diameter. " The 

 papilke, which cover the spore, show, when highly magnified, 

 a distinct net-like pattern," McBridc. The elaters of this 

 species are subject to much irregularity in the way of abnor- 

 mal swellings, duplicating the spines at the apex, etc.; the 

 spinules are sometimes quite obsolete on some or all of the 

 elaters of a sporangium. 



5^3. GoNiosPORA, Fr. Sporangia obovoid to oblong, sessile 

 and closely crowded on a well-developed common hypothallus. 

 Spores with thick ridges upon the surface, which are com- 

 bined into a more or less incomplete network of polygonal 

 meshes. 



The ridges of the epispore are 1-2 mic. in height, and do 

 not present to the view more than two or three perfect polj-- 

 gons on a hemisphere of the spores ; more often the reticula- 

 tion is imperfect, the ridges being interrupted and defective. 

 When highly magnified these ridges are seen to be "per- 

 forated through their thickness with one, two or three rows, 

 or with clusters of cylindrical openings or pits, or are sculp- 

 tured into intricate plexuses of minute reticulations with 

 quadrilateral interspaces." 



ID. Trichia affinis, DeB. Sporangia obovoid to oblong, 

 sessile and closely crowded on a common hypothallus; the 

 wall thin, golden-yellow to tawny or brownish-yellow, smooth 

 and shining. Mass of capillitium and spores golden to tawny- 

 yellow ; elaters long, simple, 4-5 mic. in thickness, ending in 

 a smooth tapering point, 6-10 mic. in length; spirals four, 

 usually spinulose, rarely smooth. Spores angularly or irreg- 

 ularly globose, 10-12 mic. in diameter. 



