LYMAN: STUDIES OF HYMENOMYCETES. 
167 
thickly over the substratum and are never completely covered by the 
subsequent formation of bulbils even in old cultures. In rare instances 
conidia were seen of the type described above. 
These two kinds of bulbils thus agree very closely with each other 
and also with those of Corticium alutaceum in appearance, and in 
method of development and of germination. Moreover, the same 
type of conidium is associated with all three. Hence it seems prob¬ 
able that they belong to closely related species of Corticium , but, as 
is mentioned above, this point cannot be determined until more per¬ 
fect hymenia are obtained. 
Several other varieties of bulbils have been cultivated by the writer 
but have given no indication of basidiomycetous relationships. Fur¬ 
ther discussion of these forms and of the nature of bulbils in general 
is reserved for a later page (see p. 196). 
Peniophora Candida (Persoon) Lyman. 
(Aegerita Candida Persoon.) 
PI. 20, fig. 44-55; pi. 26, fig. 138. 
The small white fructifications of Aegerita Candida are common 
upon damp prostrate sticks of alder and other wood about the wet mar¬ 
gins of ponds and along brooks. On a favorable stick the fructifica¬ 
tions may be closely packed together side by side, in which case they 
strongly resemble insect eggs in form, size, and general appearance. 
Frequently there is associated with the Aegerita a delicate whitish, 
pearl-colored or creamy Basidiomycete of the Corticium type. A 
connection between the two forms was suspected on account of this 
companionship, and, although the Aegerita frequently occurs alone, 
prolonged search failed to reveal any well developed specimens of the 
Basidiomycete which were not more or less closely accompanied by 
the Aegerita. The identity of the two forms as stages in the life his¬ 
tory of one species was definitely established by culture study, as will 
be explained below. 
Specimens of the Basidiomycete were sent to Professor Burt, who 
pronounced it a new species of Peniophora, which is described below 
as Peniophora Candida (Persoon). It is a very delicate form, pure 
white or frequently pearl-colored when moist, and becoming faintly 
cream-colored when dry. It appears first in the form of small circular 
