ork, Pennsylvania, South Carolina, Ohio, Illinois,
Iowa, Washington; Canada.

2. CRIBRARIA MACROCARPA _Schrader._

PLATE XVII., Fig. 2.

1797. _Cribraria macrocarpa_ Schrad., _Nov. Gen. Plant._, p. 8.

Sporangia more or less closely gregarious, yellowish brown, pear-shaped
or obovate, large, .8-1 mm. in diameter, stipitate; stipe brown
furrowed, erect or often nodding, about equal to the sporangium or
longer; calyculus distinct, marked by numerous dark brown radiating
ribs, iridescent, perforate above, deeply dentate, and merging gradually
into the elegant network, of which the dark nodes are more distinctly
expanded about half way up, less so at the apex and below, the filaments
exceedingly delicate, simple, with occasional free ends projecting into
the small meshes; spore-mass yellowish, spores by transmitted light
almost colorless, minutely roughened, 5-6 mu.

Perhaps the most striking characteristic of the present species, aside
from its large size, is the peculiarly perforated cup or calyculus.
Schrader's artist failed him here completely. The structure is
exceedingly delicate, the peridium between the ribs and reticulations
reduced to the last degree of tenuity, with the iridescence of the
soap-bubble, here and there lapsed entirely. Withal the structure seems
firm enough and persists until all the spores are dissipated by the
wind.

Easily distinguished from the preceding, its only rival in size, by the
obovate or turbinate, netted sporangium, its much longer stem, and flat,
perfectly formed nodes.

Rare. New York, North Carolina, South Carolina, Oregon; Toronto,
Canada.

3. CRIBRARIA MINUTISSIMA _Schweinitz._

PLATE XVII., Figs. 6, 6 _a_.

1832. _Cribraria minutissima_ Schw., _N. A. F._, No. 2362.

Sporangia scattered, orange or nut-brown, very minute, .1-.3 mm. or
less, globose or ellipsoidal, stipitate, erect or nodding; hypothallus
none; stipe short, 1-3 times the sporangium, filiform, tapering upward,
brown; the calyculus variable, sometimes well marked and separated from
the net when fully mature, by a shallow constriction, more commonly
small or entirely wanting, especially in the spherical sporangia; net
simple, large meshed, without nodal expansions, the threads flattened;
spore-mass yellow, spores by transmitted light, pale, nearly smooth, 5-6
mu.

A most beautiful tiny species. Generally in all the specimens before us,
a perfect, spherical net, firm enough to retain its place