168 
Journal of Mycology 
[Vol. 11 
spread abundantly through the tissues of the host. However, 
they are not found deep down in the host tissues immediately 
below the point from which the stipe of the parasite arises. 
Nor do more than a few scattered hyphae appear in the peri¬ 
pheral regions of the swollen edges of the hypertrophied host. 
Occasionally he found the hyphae of the host swollen greatly, 
but in no case were their walls penetrated by the hyphae of the 
parasite. 
On October 6, 1904, four very perfect and well developed 
specimens of Paneolus epimyces were found on a shady lawn 
apparently parasitic on Coprinus comatus Fr. Several large 
healthy specimens of the latter were found not more than 5 in. 
distant from any one of the infected forms and no other Agaric 
was or has since been found growing in that ivicinitv. 
These specimens resembled the herbarium specimens of 
those parasitic on C. atramentarius (as identified by McKenna), 
but with some variations. They are considerably larger, but the 
greater size is only proportional to the greater size of C. comatus 
as compared with C. atramentarius. The pileus in one specimen 
is 3.5' broad. Here and there portions of the veil adhere to 
the pileus, forming a fringe on the young cap. The surface 
of the cap is roughened by reticulate umber colored areas, especi¬ 
ally at the margin, which latter become elevated and flaky, break¬ 
ing up into recurved umber patches. The stipe is cylindrical 
1.5' long by 5" in diameter in the largest specimen. The spores 
vary in size from.ooo3'-.ooo4' by .ooo2'-.ooo28'. 
The hypertrophied host resembles that described by Mc¬ 
Kenna, but is larger, becoming from 2 to 3 inches in diameter 
by 2 inches high. It forms a cup-shaped or cushion-like mass 
with swollen edges and a deep indentation at the top. Some¬ 
times a single large carpophore arises from the center of this 
indentation. In other cases two or more are present in various 
stages of development. The mass of the host is scarcely dis¬ 
tinguishable as stipe and pileus. It is merely narrowed below 
and is connected directly with thick mycelial strands ramify¬ 
ing in the substratum. The outside is striate and covered with 
brownish fibres, especially that portion which corresponds to 
the pileus. The thickened edges of the •■•hypertrophied host 
were examined, and although the gills, basidia and sterigmata 
could be distinctly made out, the fungus was apparently not 
sufficiently matured to produce spores. 
The reasons for believing the host in this case to be Co¬ 
prinus comatus are as follows: The fungi in question are accom¬ 
panied by growths of C. comatus only, and the host resembles 
closely the form identified from its spores as C. atramentarius 
by McKenna, but is as much larger than that form as Coprinus 
comatus is larger than Coprinus atramentarius. 
