numerous, yellowish, roundish, or ellipsoidal. Spores globose,
nearly smooth, violaceous, about 10 mic. in diameter.

Growing on living leaves of _Cornus canadensis_, Adirondack Mountains,
New York. I have not seen a specimen of this _Physarum_, but from
Professor Peck's description and figure it seems to be a unique species.

13. PHYSARUM THEJOTEUM, Fr. Sporangia very small, sessile, on a thin
membranaceous hypothallus, closely crowded together and more or less
connate, subobovoid or oblong, irregular from mutual pressure; the wall
a thin violaceous membrane, closely covered with a thin layer of small
irregular scales of lime, tawny or yellowish tawny in color, breaking up
irregularly about the apex. Capillitium a loose irregular net-work of
slender threads, more or less expanded at the angles; the lime nodules
small, tawny or yellowish, not numerous, ellipsoidal or fusiform, by
confluence elongated and irregular. Spores globose, even, violaceous,
6-7 mic. in diameter.

Growing on old wood, mosses, etc. Sporangia .2-.4 mm. in diameter at the
apex, densely packed and their walls grown together, approaching the
aethalioid structure; the lime-nodules from one to two or three times
the diameter of the spores in thickness. I have described my specimens,
which are abundant, very carefully, and judge them to be referable to
this species; if so, they show that the species should be kept apart
from _Physarum virescens_. _Didymium nectriaeforme_ B. & C., is evidently
this same species.

14. PHYSARUM LATERITIUM, B. & R. Sporangia sessile, irregularly globose
and gregarious, or by confluence more or less elongated and
plasmodiocarp; the wall a thin violaceous membrane, rugulose and
iridescent, closely covered with small irregular scales of lime, from
testaceous or brick-red to bright red in color. Capillitium a dense
irregular net-work of tubules, much expanded at the angles; the nodules
of lime small, very numerous, roundish or angular, whitish or yellowish,
sometimes tinged with red granules. Spores globose, very minutely
warted, violaceous, 8-10 mic. in diameter.

Growing on old wood, sticks, leaves, etc. Sporangia .4-.6 mm. in
diameter, by confluence sometimes much elongated; the lime-nodules two
or three times the diameter of the spores in thickness. _Didymium
lateritium_ B. & R. _Physarum inequale_ Peck, is the same species.

Sec.2. SAXELLA. Lime in the capillitium abundant, the nodules large,
angular or irregular, wit