[=Coemansii=, Rab. P. campan. tomentose, whitish, edge incurved; g. fold-like, somewhat forked, cinnamon.
[=auriscalpium=, Fr. Brown. P. thin, convex, glabrous; g. vein-like, few, distant, simple; s. exactly lateral, straight, downy.
Resembling _Hyduum auriscalpium_ in form, but smaller.
[=tenella=, Fr. P. .5-1 cm. effuso-reflexed, thin, soft, blackish, becoming lobed; g. vein-like, simple, with shorter ones, dark.
[=cupularis=, Fr. P. 2-3 mm. resupinate, soft, orbicular, outside even, downy, grey; g. vein-like, simple, radiating from centre.
Resembles young condition of _Pleurotus applicatus_.
[=fimicola=, Bagl. P. resupinate, thin, concavo-patellate, flesh-colour, with a byssoid border; veins very slight, distant.
A. SPELEAE. _Gills crowded, more or less coalescent. Very doubtful, probably morbid forms of Agarics._
[=verpoides=, Fr. P. campan. obtuse, glabrous, brown; g. very thick, coalescent; s. equal, rigid, striate, glabrous.
[=cryptarum=, Secr. Foetid. P. conico-deformed, brown; g. adnexed, undulate, subcoalescent, flocculose, fleshy-grey; s. unequal, flexuose, hoary-fibrillose.
[=canaliculata=, Pers. P. pallid white, oblique, subumbil. almost glabrous; g. crowded, distinct, almost simple, edge slightly canaliculate; s. solid, subundulate, naked.
=caliginosa=, W. G. Sm. P. subumb. edge incurved, greyish, white and silky when dry, 1 cm.; g. subdecur. thick, narrow, branched, grey; s. 3-5 cm. often inflated, whitish, silky, hollow, rusty inside; sp. 5 × 3.
B. PARASITAE. _Gills distinct from each other, distant. Growing on decaying fungi._
[=nauseosa=, Weinm. Smell nauseous. P. fleshy, globose then hemisph. ochraceous, pulverulent, edge involute; g. distant, forked, pallid; s. fistulose, thick, obliquely sulcate and twisted, pallid.
=asterophora=, Fr. P. 1-1.5 cm. conical then hemispher. fawn, mealy with large stellate conidia; g. adnate, distant, rather forked, dingy; s. 1-1.5 cm. whitish pruinose then brownish, twisted; sp. 3 × 2.
=parasitica=, Fr. P. 1-2 cm. conical then exp. irreg. with grey meal formed of large, elliptical, smooth conidia; g. adnate, thick, distant, then forked and anastomosing, dusky; s. 2-6 cm. whitish, floccosely downy; sp. 5 × 3.5.
[=microphylla=, Corda. P. hemispher. soft, glabrous, naked, white; g. adnate, entire, dingy white; s. glabrous, bluish.
