Bean—The Myxomycetes of Wisconsin. 1271 
easily recognized by its very long stipe, small globose sporangium 
dotted with numerous small roundish nodules projecting plainly 
above the general surface. The obconic calyculus is always re¬ 
presented in the outline, if not in definite structure.’’ 
Lister calls the cup one-third the height of the sporangium, or 
more or less obsolete. The nodes are connected by three to six 
very slender threads, and few or no rays. 
Massee finds the calyculus occupying about half the sporan¬ 
gium, often perforated above. 
The description of Saccardo does not differ essentially from 
the above. 
The specimens which I have agree with the above descriptions 
in general. The calyculus is variable, as Macbride has said. 
My one collection of specimens was found at Madison, May 
1902, growing on much weather-worn soft wood, mixed with the 
ripe sporangia of Uemitrichia elavata. 
Bictydhun cancellation (Batsch) Macbr. 
1789. Mucor cancellatus Batsch, Blench. Fung., II., p. 131. 
1889. Biotydium cancellatnm (Batsch.) Macbride, M.-A. S.-M., 
p. 172. 
Macbride gives the best description: ‘ 1 Sporangia gregarious, 
depressed globose, nodding, the apex at length umbilicate, stipi- 
tate, in color brown, or brownish purple; the stipe varying much 
in length from two to ten times the diameter of the sporangium, 
attaining from 5 to 6 mm., generally erect, more or less twisted 
and pallid at the apex, below dark brown, with hypothallus 
small or none ; calyculus often wanting, when present a mere 
film connecting the ribs of the net; the net made up chiefly of 
meridional ribs connected at intervals by transverse parallel 
threads, above an open Cribraria- like network closing the apex 
and more or less rudimentary; the spores varying in color 
through all shade of brown and purple when seen in mass, by 
transmitted light reddish, 5-7^, smooth or nearly so.” 
Saccardo adopts the name B. cernuum (Pers.) Nees. He calls 
the spores yellow-brown, smooth, and 4-5y in diameter. 
Lister calls the color red-brown; the spores pale red, minutely 
wanted, and from 4—7w in diameter. He finds the spores “usu- 
