=nauseosum=, Cke. Smell nauseous. P. 3-4 cm. convex then exp. gibbous, viscid, whitish ochre; g. very broad; s. 3-5 cm. whitish, mealy above; sp. 20 x 10. Differs from _H. crustuliniforme_ in glabrous s. =capnicocephalum=, Bull. P. 3-5 cm. exp. even, glabrous, gilvous, disc darker, edge becoming blackish; g. broad, rusty; s. 3-4 cm. narrowed downwards, fibrillosely-striate, pale rufescent; sp. 9 x 5. (12-14 x 7-8, Sacc.) =ischnostylum=, Cke. P. 3-5 cm. exp. broadly umb. rather viscid, white or a little pallid at disc; g. edge serrulate; s. 4-5 cm. smooth, naked, whitish; sp. 12 x 7. Differs from _H. nudipes_ in whitish p. [=diffractum=, Fr. P. convex, obtuse, glabrous, nearly dry, at length broken up into scales, tan; g. broad; s. hollow, white, narrowed below, whitish floccosely scaly above; sp. 10-12 x 4-5. [=subzonatum=, Weinm. P. campanulato-exp. viscid, with darker innately scaly zones, whitish; g. crowded, narrow; s. equal, rather bulbous, fibrillose, apex pruinose. [=spoliatum=, Fr. P. exp. obtuse, viscid, even, glabrous, reddish tan; g. broad, crowded; s. equal, rooting, tough, glabrous, apex pruinose; sp. 10 x 6. [=tortuosum=, Karst. P. convex, exp. gibbous, even, rufous-tan then pale, glabrous; g. pallid then honey-colour; s. narrowed below, hollow, contorted, pallid, apex with white floccose scales; sp. 6-9 x 4-5. C. PUSILLI. _Pileus scarcely an inch broad._ =magnimamma=, Fr. P. 2-3 cm. exp. umbo strongly mammiform, naked, brick-red then pale; g. obtusely adnate, crowded; s. 2-3 cm. equal, glabrous, gilvous then pallid; sp. ----. [=sterile=, Jungh. P. campan.-exp. glabrous, even, dry, violet; g. free, narrow, rusty; s. solid, equal, glabrous, violet, apex floccosely pruinose. [=odini=, Fr. P. exp. obtuse, naked, bay, edge tawny; g. slightly sinuate, yellow then tawny; s. fibrillose, tawny bay. =petiginosum=, Fr. P. 1.5-2 cm. conico-convex then exp. yellowish, gibbous disc fuscous, margin silkily hoary; g. free, yellow then olive bay; s. 3 cm. rufescent, pulverulent; sp. 10 x 5. NAUCORIA, Fr. A. GYMNOTI. _Pileus glabrous. Veil absent. Spores rusty, not dingy rusty brown._ * _Gills free or slightly adnexed._ =lugubris=, Fr. P. 3-7 cm. campan.-exp. wavy, often viscid, even, pallid becoming rusty, opaque; g. free, very broad, crowded; s. 6-9 cm. glabrous, fusiformly rooting, pallid; sp. 7 x 4. A form in pine woods has p. bullate, disc bay; s. short. =festiva=, Fr. P. 2.3 cm. convex, subgibbous, even, glutinous, usually olive-brown, isabelline when dry; s. free, crowded, ventricose, rusty; s. 5-7 cm. hollow, fusiformly rooting, colour various, violet, rufous, &c.; sp. 12 x 6. (8 x 4 Sacc.) Every part variable in colour. [=christinae=, Fr. P. conico-acute, rather wavy, viscid, fiery cinnamon when moist, tawny and shining when dry, then pale; g. free, pallid then fiery saffron; s. cylindric, glabrous, rooting, dull blood-red; sp. 4-5 x 3-4.