tort] ATKINSON—DICTYOPHORA AND ITHYPHALLUS 3 
203), and later by FiscHer (6, p. 23). These rhizomorphs consist 
of a central strand or core, and a cortex. The central strand or 
core is composed of hyphae, the general direction of which is parallel 
with the axis, while here and there certain hyphae turn outward 
with the cortex. | Between the hyphae there is more or less gelati- 
nous substance, which is more abundant in the central portion of 
the core,"where the threads are rather distant, while on its periph- 
ery they are more crowded. These threads stain readily, so that 
. ‘ 1.—Rhizomorphs and young fruit bodies of Ithyphallus impudicus, from 
ontarlier, France, 1905; natural size. 
in longitudinal sections this medulla or core stands out distinctly 
from the rather thin cortex. 
In the young fruit bodies, according to FiscHer (6, p. 23), 
this medulla is present and terminates in a tissue of slender hyphae 
which are rich in protoplasmic content. This central portion of 
the pyriform young fruit body has the form of a sheaf, which in 
longitudinal section presents a fan-shaped outline. This tissue 
also stains readily and is surrounded by a cortical layer of looser 
texture, the external portion of which contains hyphae and crystals 
of calcium oxalate, exactly like those in the cortex of the rhizo- 
morphs. Burt (ta, p. 347) describes a similar structure in the 
young fruit bodies of Mutinus caninus (Huds.) Fr., but differs from 
