Iowa_, II, p. 385.
1894. _Craterium pedunculatum_ Trent., Lister, _Mycetozoa_, p. 70.
1899. _Craterium minutum_ (Leers) Fr., Macbr., _N. A. S._, p. 78.
1911. _Craterium minutum_ Fr., List., _Mycetozoa, 2nd ed._, p. 94.

Sporangia scattered, gregarious, cyathiform or turbinate, grayish brown,
stipitate, the peridial wall rather thick, double, opening by a distinct
lid which lies usually below the slightly thickened and everted margin
of the cup; stipe paler, translucent, about equalling in height the
peridial cup, longitudinally wrinkled, with hypothallus scant or none;
capillitium physaroid, the calcareous nodules large, white, and
generally aggregated at the centre of the cup; spore-mass black, spores
by transmitted light violaceous, minutely warted, 8-10 mu.

This is the most highly differentiated of the whole series. The cup is
shapely and well defined, while the lid is not only distinct, but is a
thin, delicate membrane of slightly different structure when compared
with the peridial wall. It is in all the specimens before us much
depressed below the mouth of the sporangium, and the whole structure in
our specimens corresponds with Fries' description of _C. pedunculatum_
Trent., while specimens received from Europe correspond to Fries'
account of _C. minutum_ Leers. Nevertheless we are assured that the two
forms are in Europe developed from the same plasmodium, and therefore
adopt the earlier specific name as above. _N. A. F._, 2500. This is
probably _Fungoides convivalis_ of Batsch and Micheli.

In this species yellow sporangia are sometimes seen. Miss Currie reports
from Toronto such variation and in Europe the case seems not unusual.

In fact, there is a yellow tinge about the sporangia of every species
listed here, except the first. With the same exception, the plasmodium
in every case is yellow.

Common throughout the eastern United States, west to Iowa, Colorado, and
south to Louisiana; cosmopolitan.

=5. Physarella= _Peck._

1882. _Physarella_ Peck, _Bull. Torr. Bot. Club_, IX., p. 61.

Sporangium pervious to the base, the interior walls forming a persistent
spurious columella; capillitium composed of filaments with here and
there minute knot-like thickenings, straight tubes containing
lime-granules extending from the exterior to the interior walls of the
sporangium, persistently attached to the former.[31]

Such is Dr. Peck's original description of this most peculiar genus. The
form o