rata=, Fr. P. 2-3 cm. pitch-black then brown, even, exp. or depr.
margin arched; g. adnate; s. 2-2.5 cm. even, glabrous, brown outside and
inside; sp. ----.

=ambusta=, Fr. P. 1-2 cm. exp. papillate, slightly striate, glabrous,
livid brown; g. adnate, tinged fuscous; s. 1.5-2 cm. somewhat stuffed,
tough, livid; sp. 5-6 x 3-4.

Differs from _C. atrata_ in umbonate pileus.

** _Gills very broad, more or less distant._

=lacerata=, Lasch. P. 2.5-3.5 cm. camp. moist, streaked dark brown on
pale ground; g. adnexed, broad, thick, greyish; s. 5-9 cm. twisted,
fibrous, apex floccose; sp. ----.

[=phalliodorus=, Alex. Foetid, convex, subumbilicate, at length lobed,
dingy ochraceous; g. adnate, white; s. glabrous.

=murina=, Fr. P. 2-4 cm. exp. umbilicate, glabrous then rugulosely
squamulose, dark brown then pale; g. slightly adnexed, broad; s. 5-7 cm.
hollow, cylindrical, not rooting, grey; sp. 7 x 4.

Somewhat resembling _C. atrata_, differing in very broad almost free
gills.

[=glacialis=, Fr. P. watery, fragile, obtuse, dusky fuscous then pale;
g. free, grey; s. grey, naked.

=protracta=, Fr. P. 1.5-2 cm. exp. shining, disc fleshy, depressed,
subpapillate, greyish brown, margin striate; g. broad, grey; s. 5-7 cm.
glabrous, root long fibrillosely strigose; sp. ----.

=tesquorum=, Fr. P. 1-1.5 cm. plane, obtuse, even, blackish then pale;
g. free, greyish brown; s. 3-5 cm. thin, brown, apex pruinose; sp. ----.

[=cessans=, Karst. P. exp. then depr. glabrous, striate, pallid fuscous
then pale and hoary, sublubricous; g. adnate, then adnato-decur.
connected by veins, whitish; s. solid, pallid, apex pruinose.

=clusilis=, Fr. P. 1-2 cm. exp. umbilicate, glabrous, hygr. livid then
pale; g. arcuately adfixed, semicircular, broad; s. 2-4 cm. glabrous,
pallid, not rooting; sp. ----.

Differs from _C. tylicolor_ and _C. nummularia_ in umbilicate pileus,
and decurrent tooth to gills.

[=erosa=, Fr. P. exp. striate, hygr. silky when dry, grey; g. broadly
emarginate, greyish; s. greyish-white, glabrous.

=tylicolor=, Fr. P. 1-2 cm. exp. subumb. even, glabrous, bluish-grey,
with white meal when young; g. free, distant, broad, grey; s. 2-3 cm.
pulverulent, grey; sp. ----.

_Introduced species._

=Dorotheae=, B. P. 2 cm. globose then exp. subumb. dark brown then
paler, sulcate, squarroso-setulose; g. white, distant; s. 5-6 cm.
slender, minutely discoid at base, granulated like pileus and beset with
white bristl