1280 Wisconsin Academy of Sciences, Arts and Letters. 
Arcyria nutans (Bull.) Grev. 
1791. Trichia nutans Bulliard, Champ., p. 122, t. 502, III. 
1824. Arcyria nutans Grev., FI. Edin., p. 455. 
Saccardo: “Peridia clustered, evanescent, short-stiped, cylin¬ 
drical; spores and capillitium dull whitish-yellow; capillitium 
expanded, long, curved, at length decumbent; threads attached 
to the tube of the stipe, 3-4/x thick, bearing stout spines irregu¬ 
larly; spores smooth, 7-8y.” 
Macbride calls the sporangia pale yellow or buff, and speaks of 
forms that are sessile by an acute base. The base alone of the 
peridium persists, and that is a shallow, colorless, often inwardly 
spinulose, plicatulate calyculus. ITe says the hypothallus is thin, 
but usually in evidence. The capillitium, besides the spines, has 
sharp-edged transverse plates, sometimes rings, the surface es¬ 
pecially marked by an indistinct reticulation, all of which char¬ 
acteristics I have noticed in my specimens. He says, also, that 
the capillitium is very lightly attached, and that the spores are 
colorless. 
Lister names about the same characteristics as given above, 
but adds ; “ Stalk short, or elongated and weak, filled with spore¬ 
like cells, buff; free ends more or less numerous, with clavate 
tips.” 
Maseee’s description agrees with the foregoing. 
I find these descriptions accurate for my specimens. The long, 
soft, plumose, ochraceous capillitium mass makes this species 
easy to distinguish. 
Our two specimens were obtained, one near Wausau in the 
summer of 1894, growing on bark, the other on poplar wood near 
Pond du Lac, July 30, 1897. 
Arcyria incamata Persoon. 
1791. Arcyria incamata Pers., Gmel ., Sys. Nat., II., p. 1467. 
Macbride: “Sporangia closely crowded, cylindric, 1-15 mm. 
high, rosy or flesh-colored, stipitate or almost sessile, stipe gen¬ 
erally short, sometimes barely a conical point beneath the calycu¬ 
lus; hypothallus none; peridium wholly evanescent except the 
