1911] ATKINSON—DICTYOPHORA AND ITHYPHALLUS 15 
ing to the point where it was observed in the younger fruit bodies, 
and also to the point where the well organized indusium of Dictyo- 
phora is attached (see fig. 13). 
Fig. 13 is from a similar section of D. duplicata, that is, a longi- 
tudinal section at the upper part of the fruit body; the indusium 
(Z) is joined to the stipe at the point where the annular projection 
occurs. The main portion of the remnant of primordial tissue 
lies between the indusium and stipe, a very thin layer only lying 
between the indusium and pileus, which is continuous with the 
primordial tissue above the indusium between the stipe and pileus. 
The dark line at the edge of the primordial tissue next the indusium 
is caused by the denser accumulation of hyphae as they have with- 
drawn or have been pushed back by the folding and crowding of 
the chamber walls of the indusium. In this figure can be seen 
also the delicate weft of hyphae lying in the chambers of the stipe, 
pileus, and indusium. This is the remnant of primordial tissue 
within and from which these parts were organized. It is continuous 
at certain points with the “veil” or membrane of primordial 
tissue lying between the stipe and pileus and enveloping the indu- 
sium. A similar weft of primordial tissue lies within the chambers 
of the stipe and pileus in the other species. 
Fig. 14 is from a longitudinal section in the same region of the 
fruit body of Phallus ravenelii. The “veil” (B) is seen to consist 
of undifferentiated tissue, that is of primordial tissue. There is 
no evidence of a distinct organ like the indusium of Dictyophora 
lying within it, nor even of a fundament or rudiment of such an 
organ. The primordial tissue is a homogeneous weft which is con- 
tinuous between the chambered walls of the stipe. 
It will be interesting now to examine cross-sections near the 
middle region of the fruit body at the same stage of development. 
Phallus ravenelii presents nothing essentially different from that 
shown in fig. 14; but from a comparison of the photographs of 
these sections from Jthyphallus impudicus (fig. 15) and Dictyophora 
duplicata (fig. 16), the impression is at once gained that in Dictyo- 
phora duplicata, as represented by this specimen, there is a “veil,” 
in addition to the indusium, quite as strong as that present in 
Ithyphallus impudicus. It is therefore quite possible that, at the 
