[=unguicularis=, Fr. P. resup. covered with a viscid pellicle, grey or blackish; s. incurved then ascending, very short, white; g. distant, white; sp. 4-6 x 1.5. [=Silvanus=, Sacc. P. thin, sessile, cupulate or dimidiate, resupinate then reflexed, very even, glabrous, greyish black, very minutely white-scurfy; g. broad, dingy white; sp. strongly curved, 8-9 x 3.5-4. =cyphellaeformis=, B. P. 5-8 mm. pendulous, cup-shaped, downy or mealy, upper layer gelatinous, grey; g. narrow, distant, pure white; sp. ----. Resembling a _Cyphella_ in habit. [=nivosus=, Q. P. thin, campan. sessile, gelatinous, white and like parchment when dry, granularly rugose, striate, subpellucid, smoky grey, when moist with hyaline warts; g. narrow, white; sp. reniform, 12 x 2. =applicatus=, Batsch. P. 4-8 mm. dusky grey, sessile, thin, rather firm, cupulate, resupinate then reflexed, slightly striate, subpruinose, base downy; gills broad, paler; sp. glob. 4-5. Differs from _P. tremulus_ in absence of distinct s. [=Mustialensis=, Karst. P. resupinate, subgelatinous within, sessile or with an exceedingly short lateral stem, black, white-tomentose; g. distant, narrow, paler; sp. 6-8 x 4. Differs from _P. applicatus_ in black p. with white down, and dark g. *** _Pileus membranaceous, not viscid._ =Hobsoni=, B. P. 4-7 mm. reniform or semicircular, horizontal, pale grey, downy; g. radiating, pallid; sp. ----. Differs from _P. applicatus_ in being plane. =striatulus=, Fr. P. 3-4 mm. very thin, pale grey, slightly cup-shaped, striate, glabrous; g. few, distant. [=canus=, Q. P. thin, dimidiate, reniform, edge mostly lobed, whitish, downy, striate; g. very distant, adnate, white, edge fimbriate; s. rudimentary; sp. 7-9 x 5. [=arenarius=, Lasch. Hoary-pallid, subsulcate, slightly tomentose; g. distant, thick, broad; s. absent or very short, white-floccose. Allied to _P. striatulus_. [=perpusillus=, Fr. White. P. very thin, resup. then reflexed, even, glabrous; g. few, broad. [=subplicatus=, Karst. P. very thin, resup. orbicular, usually entire, almost plane, striato-plicate, rather silky, white, fixed by a white downy base; g. radiating from an excentric point, broad, whitish; sp. 6-7 x 4-5. var. _cinereus_, Karst. Entirely pale grey or glaucous. =hypnophilus=, B. P. 3-6 mm. very thin, flat, white, rather reniform, nearly smooth; g. radiating, distant, simple; sp. 5 x 3. Resembling _Claudopus variabilis_, but gills and spores white. =chioneus=, Pers. Snow white. P. 2-3 mm. very thin, subresupinate, downy; s. short, downy, evanescent; g. rather broad; sp. 10 long. _P. septicus_ is larger; s. more distinct; p. thicker. Differs from _P. hypnophilus_ in downy pileus. [=craterellus=, Dur. and Lev. Cupulate, white, even, downy, edge entire; sp. 6 long. [=pudens=, Q. P. downy, hygr. coriaceous, cup-shaped, g. radiating, thin, wavy, white tinged lilac; s. central, short. CANTHARELLUS, Adans. A. MESOPUS. _Pileus entire. Stem central._