IV. _Volva and ring absent. Veil very evident--at least in young state--as a felty coating, which breaks up during expansion of p. into patches; cottony, squamulose, fibrillose or mealy. Not glistening or micaceous._ * _Veil thick and felty, breaking into patches._ + _Gills attached to stem._ =aphthosus=, Fr. P. campan. even, livid, 2-3 cm. white veil at first continuous then broken into floccose patches; g. adnate; s. 5 cm. white, hollow, fibrillose; sp. 15-16 x 10. Differs from _C. varicus_ in hollow stem. [=phaeosporus=, Karst. P. conico-cylindrical then flattened, everywhere delicately striate, at first enclosed in a rufescent veil which breaks up into patches, soon naked and white; g. adnexed; s. glabrous, white, hollow; sp. 9-15 x 4-9. Differs from _C. albus_ by glabrous s. ++ _Gills free._ =picaceus=, Fr. P. campan. glutinous, striate up to disc, blackish with white patches; g. free; s. 10-15 cm. white, hollow, base swollen; sp. 14 x 8. =tomentosus=, Fr. P. cylindr. then narrowly conical, at length exp. 2-3 cm.; pallid yellow, covered with a greyish felt which breaks into scales; g. free; s. 5 cm. hollow, greyish, velvety; sp. ----. [=velatus=, Q. P. cylind. then exp. 2-3 cm. yellowish, sulcate, veil white, thin; g. free but close to s.; s. 4-6 cm. white, villose, coarsely striate; sp. 10 x 5. [=Forquignoni=, Mass. (_C. Queletii_, Forq.). P. conico-campan. veil thick, ochraceous, then broken up into persistent patches, whitish, 5-6 cm. high; g. remote; s. white, floccosely fibrillose, ending in a tawny bulb; sp. 9 x 6. [=varicus=, Fr. P. white or livid towards the split edge, with patches of white veil; g. free; s. 6-9 cm. often incurved, white, glabrous, solid, tough. Differs from _C. picaceus_ in white p. and solid s. ** _Veil breaking up into superficial scales, cottony or fibrillose._ + _Gills attached to stem._ # _Pileus white or grey._ =niveus=, Fr. All pure white. P. 1-2.5 cm. campan. floccose; g. slightly adnexed; s. 5-8 cm. hollow, villose; sp. 16 x 11-13. var. _astroideus_, Fr. P. squamose, naked, grey, 1 cm.; s. up to 8 cm. slender, glabrous. [=albus=, Q. Snow white. P. ovoid then exp. 1.5-2 cm. floccosely mealy then pearl grey and grooved, with tawny flecks at disc; g. adnate, seceding; s. coarsely striate upwards; sp. 12-13 long. [=Rostrupianus=, Hansen. White. P. thin campan. then exp. tomentose, squamulose; g. free, grey then blackish; s. narrowed upwards, glabrous above, downy below, base with white tomentum. Medium sized, allied to _C. niveus_. [=pilosus=, Beck. P. cylindr. apex rounded, white, densely covered with septate acute white hairs, then exp. and centre almost glabrous and yellowish, edge slightly striate; s. slender, pubescent, base floccose; sp. 9-12 x 6-7.