Not previously reported. Found by Miss Madeleine Le Moyne, Washington, Pa., September, 1898, and sent to writer. Gills 3 lines broad, not narrow in proportion to flesh. Taste and smell similar to P. ostreatus. Cooked it is tender, and more succulent than P. ostreatus. III.—RESUPINA´TI. =P. mastruca´tus= Fr.—_mastruca_, a sheepskin. =Pileus= up to 2 in. long and 1 in. broad, sessile, at first resupinate then expanded and horizontal, often lobed, upper stratum of pileus gelatinous, brown, bristling with squarrose or erect squamules. =Flesh= thickish. =Gills= radiating from the point of attachment, broad, rather distant, grayish-white. On old trunks. Imbricated. Readily distinguished by the brown, squarrosely scaly pileus. _Massee._ =Spores= oblong, oblique, 8×5µ _Morgan_. In June, 1886, the writer found this species in oak woods near Philadelphia. It grew on fallen trunks and on decaying spots of living timber. It is edible, and of good flavor, but is rough in the mouth. If found in quantity, the extract of it would make a delicate soup. [Illustration: Grouped by F.D. Briscoe—Studies by C. McIlvaine. PLATE XXXVII.] FIG. PAGE. FIG. PAGE. 1. HYGROPHORUS PRATENSIS (WHITE 5. HYGROPHORUS VAR.), 152 CANTHARELLUS, 156 2. HYGROPHORUS PRATENSIS (COLORED 6. HYGROPHORUS VIRGINEUS, VAR.), 152 153 3. HYGROPHORUS PRATENSIS (AFTER 7. HYGROPHORUS NIVEUS, RAIN), 152 153 4. HYGROPHORUS MINIATUS, 159 HYGROPH´ORUS Fr. _Gr._—moist; _Gr._—to bear. (Plate XXXVIII.) [Illustration: HYGROPHORUS PRATENSIS.] =Pileus= regular or undulated and wavy, often viscid or moist. =Flesh= of the pileus continuous with that of the stem and descending as a trama into the gills. =Gills= adnate or adnexed, more or less decurrent, _waxy_, often thick and forked, _edge always thin and sharp_, often branched. On the ground. Many species are brightly colored. =Spores= white.