=brumalis=, Fr. P. 1.5-2.5 cm. umbil. then deeply depr. flaccid, glabrous, wavy, livid, pale when dry; g. pallid; s. 4-5 cm. glabrous, whitish, often curved; sp. 4-5 x 3-4. ***** ORBIFORMES. _Pileus rather fleshy, convex then flattened or depressed, polished; g. adnate; dingy, becoming pale._ + _Gills grey or olive._ =orbiformis=, Fr. P. 4-5 cm. convexo-plane, even, smoky grey; g. greyish white; s. 5-7 cm. naked, narrowed upwards, grey; sp. ----. Differs from _C. cyathiforme_ in plane p. [=applanata=, Secr. P. exp. disc depr. flaccid, lurid then hoary; g. greyish white; s. fuscous with white down, pallid and silky fibrillose upwards. [=insignis=, Gill. P. conical, convex, then exp. edge more or less wavy and upturned, much depr. round strong umbo, even, glabrous, red, umb. rusty; g. closely crowded, clear white; s. cylindrical, solid, colour of p. [=papillata=, Gillet. P. convex then exp. with a little persistent brown umbo, glabrous, hygr. slightly striate, clear reddish; g. pallid; s. subequal, wavy, white-pruinose, apex colour of p. [=radicellata=, Godey. P. convex, umbil. purplish brown, grey-pruinose; g. crowded, soon yellowish grey; s. equal, curved, colour of g. with a white bloom, base white with a number of branched strands. [=ochracea=, Gill. P. irreg. umb. uniformly ochre, silky or pruinose; g. distant; s. excentric, colour deeper than p. [=macrophylla=, Karst. P. thin, convex, orbicular, livid-white then paler and shining; g. adnate, very broad, triangular, white; s. wavy, whitish, glabrous, base thickened; sp. ----. [=lepiphylla=, Gill. P. convex then depr. uniformly pale grey then pallid; g. decur. tinged grey; s. elastic, wavy, grey, with a white bloom, with longitudinal whitish striae. =metachroa=, Fr. P. 3-5 cm. convexo-plane then depr. brownish grey, then livid, at last pallid; g. pale grey; s. 2-3 cm. grey, apex mealy; sp. ----. =zygophylla=, Cke. and Mass. P. 4-7 cm. thin, wavy, slightly depr. greyish ochre then pallid, edge plicate; g. deeply decur. grey, veined; s. 4-5 cm. smooth, pallid; sp. 8 x 4. =pausiaca=, Fr. P. 2-3 cm. soon plane, umber with olive tinge, often silky; g. adnate, olive; s. 4-6 cm. striate, coloured like p., apex powdery; sp. ----. =ditopa=, Fr. Smell strong, mealy. P. 2-3 cm. plane then depr. brownish grey then pale, often wavy; g. adnate, dusky grey; s. 2.3 cm. hollow; sp. ----. Differs from _C. metachroa_ in mealy smell. [=nubila=, Fr. P. exp. umb. livid then tan, glabrous; g. subdecur. rather distant, brownish tan; s. slender, apex pruinose. [=obola=, Fr. P. convexo-plane, obtuse, glabrous, hygr. livid then whitish; g. adnate, livid; s. equal, thin, striate, naked, livid. ++ _Gills whitish._ =diatreta=, Fr. P. 2-4 cm. plane then depr. edge involute, pubescent, often wavy, flesh colour then pallid tan; g. with an acute decur. tooth, crowded, narrow; s. 3-5 cm. pallid, straight, terete; sp. ----.