work of rather small
meshes, with wide expansions at the angles; the tubules filled with
white granules of lime, sometimes confluent toward the base of the
sporangium. Spores subglobose, very minutely warted, dark violaceous,
11-14 mic. in diameter.

Growing on old wood, bark, leaves, etc. Sporangia .8-1.6 mm. in length,
with a thickness of .7-1.0 mm. This species appears to be rare; the only
specimens known to me in this country I have from Professor Thos. A.
Williams, of South Dakota; they are identical with European specimens
received from Lister. _Physarum paniceum_ Fries, S. M., III, p. 141; it
approaches _Physarum cinereum_ Batsch.

8. BADHAMIA LILACINA, Fr. Sporangia globose or obovoid, sessile or
rarely substipitate, closely crowded together on a thin, brownish
hypothallus; the wall a firm, hyaline membrane, with a thick, smooth,
continuous outer-layer of lime, varying in color from gray-white or drab
to lilac and flesh color. Capillitium of very thick tubules, forming a
dense net-work of small meshes; the tubules stuffed with granules of
lime, which are white or colored somewhat as those in the wall, often
confluent in the center of the sporangium. Spores globose, minutely
warted, dark violaceous, 11-14 mic. in diameter.

Growing on wood, leaves, mosses, etc. Sporangium .5-.7 mm. in diameter.
The outer crustaceous layer of lime on the wall crumbles and falls away,
as in some species of _Diderma_. The white form is _Diderma concinnum_
B. & C.; the lilac or flesh-colored form is _Physarum lilacinum_ of
Fries, S. M., p. 141. I have seen it colored only white and drab. Under
a high magnifying power the sculpturing of the spores is seen to be
peculiar.

X. SCYPHIUM, Rost. Sporangium obovoid to oblong-obovoid, stipitate or
subsessile; the wall a thickened, brownish membrane, the surface
entirely naked or only the upper portion covered with granules of lime,
breaking up irregularly about the apex. Stipe variable in length,
arising from a common hypothallus and prolonged within the sporangium as
a columella. Capillitium of thick tubules, proceeding from numerous
points of the columella and forming a dense network; the tubules filled
with lime throughout their whole extent. Spores large, subglobose, dark
reddish-brown.

This genus differs from _Badhamia_ by the columella which gives origin
to the capillitium. The sporangia in the species composing it, resemble
those of _Craterium_, and to this genus they are ref