the stipe two or
three times as long. It does not appear to be greatly different from
_Cribraria purpurea_, Schrad.

_b. Sporangium, small._

5. CRIBRARIA TENELLA, Schrad. Sporangium small, globose, stipitate,
cernuous; the calyculus brown, shining, granulose within and faintly
ribbed, occupying from one-fourth to one-half the sporangium, sometimes
the outer thin membrane early disappearing; the network of slender
threads with small roundish or irregular nodules at the angles, each
with several (4-8) radiating threads, sometimes two or three with free
extremities, the meshes triangular or rhombic. Stipe long, tapering
upward, flexuous, curved at the apex, purplish-brown in color. Spores
pale ochraceous in mass, globose, even, 5-7 mic. in diameter.

Growing on old wood. The sporangium .3-.4 mm. in diameter, the stipe
three to five times as long. This is a much more delicate species than
_Cribraria dictydioides_. The calyculus is variable in size; in some
examples the thin connecting membrane between the ribs has disappeared.

6. CRIBRARIA MICROCARPA, Schrad. Sporangium very small, globose,
stipitate, somewhat cernuous; the calyculus represented by a few short
brown ribs, the outer membrane soon disappearing; the network of slender
threads, with small roundish nodules at the angles, each with several
(4-6) radiating threads, with an occasional free extremity, the meshes
largely rhombic. Stipe very long, slender, somewhat flexuous, bent at
the apex, purplish-brown in color. Spores in mass pale ochraceous,
globose, even, 6-7 mic. in diameter.

Growing on old wood. Sporangium .22-.27 mm. in diameter, the stipes 1-2
mm. in length. Readily distinguished by its very small sporangium and
the comparatively very long stem. I am indebted to Dr. George A. Rex for
specimens of this species.

7. CRIBRARIA CUPREA, Morg. n. sp. Sporangium very small, oval or
somewhat obovoid, stipitate, cernuous; the calyculus copper-colored,
finely ribbed and granulose within, occupying from one-third to one-half
the sporangium; the network of slender threads, with rather large
triangular or quadrilateral meshes, and with large irregular dark
copper-colored nodules, each having several (4-7) radiating threads,
with an occasional free extremity. Stipe not very long, tapering upward,
curved at the apex, of the same color as the sporangium or darker below.
Spores pale coppery in mass, globose, even, 6-7 mic. in diameter. See
Plate III, Fig. 11.