Thelphora rugosa. Lge. on old oaks. Ashew wood. 7 Maii 1839 Pilei solenato-effused, concave, coarsely waved, the margin sinuous at the extremity reflected; hms and lugs are waved, rigid, hyphæmata- by a rough-bran colon. Pilei near 2 inches in diameter, somewhat cork shaped, with large elevations and depressions. Seems to emanate by a superposition of (annual) hyphaemia or layers. Pore-wall near smooth, blackish-brown and horny, involving zonate the colouring of P. Lacer sometimes billowy. Hypocrellium lies on the upper surface; it is not polished, brown, Structure with a slight pruina.