d in one large, snow-white nodule at the center,
a few very small, roundish nodules scattered through the net-work.
Spores globose, very minutely warted, violaceous, 7-9 mic. in diameter.

Growing on old wood, mosses, etc.; a common species. Sporangium .4-.5
mm. in diameter, the stipe two or three times this length. _Tilmadoche
compacta_ Wingate. It is doubtful if _Tilmadoche columbina_ Rost.
belongs to this species. According to Lister, _Lepidoderma stellatum_
Massee, is the same as this species, and if it be objected to the name
that there is already a _Physarum compactum_ Ehrenberg, it may have to
be called _Physarum stellatum_.

_b. Sporangium more or less irregular_.

6. PHYSARUM LEUCOPHAEUM, Fr. Sporangium globose or depressed-globose,
more or less irregular, the base never umbilicate, stipitate or
subsessile; the wall a thin violaceous membrane, rugulose and
iridescent, with a thin coat of small white scales and granules of lime,
or sometimes nearly naked. Stipe variable in length, sometimes very
short or quite obsolete, occasionally a few of them confluent, wrinkled,
and sulcate, brown below, paler or whitish above. Capillitium a dense
irregular net-work of slender tubules, more or less expanded at the
angles; the nodules of lime white, small, roundish, or angular, few and
scattered. Spores globose, very minutely warted, violaceous, 8-10 mic.
in diameter.

Growing on old wood, bark, leaves, etc. The sporangium .5-.7 mm. in
diameter, the stipe about the same length, or shorter, and sometimes
wanting. The lime on the wall and in the capillitium is never abundant
and sometimes extremely scanty. Rostafinski's presentation of this
species applies well to our specimens.

7. PHYSARUM CONNEXUM, Link. Sporangia subglobose, depressed, more or
less irregular, sometimes confluent, stipitate, or subsessile; the wall
a thin violaceous, or brownish membrane, rugulose, thickly covered with
small white roundish scales of lime, which sometimes accumulate so as to
make the surface rough and uneven. Stipe short, thick, rugulose, from
snow white to smoky or sooty, especially toward the base, sometimes with
a scanty calcareous hypothallus. Capillitium a loose net-work of
tubules, much expanded at the angles; the nodules of lime small, white,
rather numerous, ellipsoidal or fusiform, sometimes confluent and
elongated. Spores irregularly globose, minutely warted, dark violaceous,
9-11 mic. in diameter.

Growing on old wood and b