The Myxomycctes of t lie Miami \ alley, Ohio. 135 



gregarious, sometimes closely crowded and irregular, the sur- 

 face umber, brown or olivaceous, minutely warted, at length, 

 irregularly dehiscent at or about the apex. The wall thick, 

 the brown vesicles loosely aggregated and densely agglutin- 

 ated together, traversed in all directions by the much-branched 

 tubules, which send long-branched extremities inward among 

 the spores ; the main branches thick and flat, with wide 

 expansions, especially at the angles, the ultimate branchlets 

 more slender and o])tuse at the apex. Spores in the mass 

 from pale to reddish ochre, globose, minutely warted, 5-6 mic. 

 in diameter. See Plate III, Fig. 7. 



Growing on old wood. .-Ethalium 5-12 mm. in diameter, 

 the width of the tubules varying from 12-25 "lic. in the main 

 branches, with broader expansions at the angles, to 6-12 mic. 

 in the more slender final branchlets. This is one of the most 

 common of the Myxomycetes ; it grows in all countries, and 

 in this region may be found on old trunks at all seasons of the 

 year. 



4. LvcoGALA FLAVOFUSCUM, Ehr. ^thalia large, sub- 

 globose or somewhat pulvinate, solitary or gregarious, the 

 surface at first silvery-shining, becoming 3'ellow-brown, min- 

 utely areolate, irregularly dehiscent The wall verj' thick 

 and firm, hard and rigid; the thick outer layer of roundish 

 brown vesicles closely compacted in numerous strata ; from 

 the vesicles of the lower strata the long and broad much- 

 branched tubules proceed into the interior among the spores; 

 the ultimate branchlets clavate and obtuse at the apex. Spores 

 in the mass pale ochre, cinerous or brow^ni.sh, globose, minutely 

 warted, 5-6 mic. in diameter. See Plate III, Figs. 8, 9. 



Growing on old trunks. ^-Ethalium 1 to several centimeters 

 in diameter, the width of the tubules varying from 25-60 mic. 

 in the main branches, with sometimes much broader expan- 

 sions at the angles, to 10-25 "''ic. in the ultimate branchlets. 

 The brown vesicles of the outer wall are easily separated from 

 each other and emptied of their contents by maceration ; it is 

 then seen that a thin pellucid membrane incloses numerous 

 roundish granules, much resembling the .spores, but usually a 

 little larger, 5-8 mic. in diameter. 



