erred by Massee, but
the capillitium is that of _Badhamia_.

1. SCYPHIUM RUBIGINOSUM, Chev. Sporangia gregarious, obovoid, stipitate;
the wall a thickened reddish-brown membrane, the upper part covered by a
thin layer of white granules of lime, the lower basal portion naked,
strongly venulose and more persistent. Stipe long, erect, reddish-brown,
expanding at the base into a brown hypothallus, prolonged within the
sporangium to more than half its height as a columella. Capillitium of
thick tubules, forming a dense net-work of small meshes; the tubules
stuffed with white granules of lime. Spores irregularly globose,
minutely warted, dark reddish-brown, 12-15 mic. in diameter.

Growing on old wood, mosses, etc. Sporangia .6-.8 mm. in height by .5-.6
mm. in diameter, the stipe from once to twice the height of the
sporangium. This is _Physarum rubiginosum_ Chevallier, _Flor de Paris_.
It is also _Craterium obovatum_ Peck.

2. SCYPHIUM CURTISII, Berk. Sporangia oblong-obovoid, stipitate or
subsessile, usually growing in clusters; the wall a thick, firm,
reddish-brown membrane, venulose and reticulate, nearly destitute of
lime. Stipes variable, commonly very short, sometimes confluent, arising
from a brown hypothallus, prolonged within the sporangium to about half
its height. Capillitium of thick tubules, forming a dense network of
small meshes; the tubules stuffed with white granules of lime. Spores
irregularly globose, minutely warted, dark reddish-brown, 12-15 mic. in
diameter.

Growing on old wood, leaves, grass, etc. Sporangium .4-.7 mm. in height
by .3-.4 mm. in diameter, the stipe often reduced to a mere point or
cushion on the hypothallus, and varying thence to nearly the length of
the sporangium. The sporangium is narrower than in the preceding
species, and the brown wall is usually without granules of lime. It is
_Didymium curtisii_, Berk. Rostafinski and Massee both preserve it
distinct from _S. rubiginosum_. See Plate XV. Fig. 73.

EXPLANATION OF PLATE XV.

Fig. 64.--Physarum glaucum, Phillips, _a._ Sporangia x 5. _b._
Sporangium x 90. _c._ Capillitium and spores x 500.

Fig. 65.--Physarum serpula, Morgan, _a._ Plasmodiocarp x 5. _b._ Piece
of plasmodiocarp x 90. _c._ Capillitium and spores x 500.

Fig. 66.--Fuligo violacea, Pers. _a._ Aethalium natural size. _b._
Capillitium and spores x 500.

Fig 67.--Fuligo flava, Pers. _a._ Portion of an aethalium x 5. _b._
Capillitium and spores x 500.

Fig. 68