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Cincinnati Society of Natural History. 



darker. Pores entire, with thick dissepiments, commonly brownish, 

 but sometimes whitish. 



59. P. velutinus, Fr. Pileus corky-coriaceous, plane on both 

 sides, soft-velvety, slightly zonate, white, at length yellowish ; the 

 margin extenuate, acute. Pores round, minute, thin, white. 



In woods on old trunks and branches; not common. Pileus 1 — 2 

 inches in breadth, with a few delicate, pale, yellowish or brownish 

 zones on its surface, and a fine short pubescence, rendering it soft- 

 velvety to the touch. The younger plants are moist and somewhat 

 spongy, but become hardened and corky. The pores become angu- 

 lar in drying, and the thin dissepiments are sometimes lacerate ; 

 they also assume a sordid or yellowish hue. 



60. P. zonatus, Fr. Pileus corky-coriaceous, convex, tuberculose 

 and gibbous behind, subzonate, villous, opaque; the margin whitish. 

 Pores minute, round or angulate, obtuse, whitish. 



On trunks and branches of sugar maple; rare. Pileus \yi — 2]/ 2 

 inches in breadth, cinereous, gray or ochraceous, villous, tubercu- 

 lose at the base. It is thicker than the following species and lacks 

 its shining zones ; it more nearly resembles the forms of P. hirsutus 

 with white pores. 



61. P. versicolor, Linn. Pileus coriaceous, thin, rigid, appla- 

 nate, depressed behind, even, velvety, shining, variegated with 

 zones of different colors. Pores minute, round, acute and lacerate, 

 white, afterward becoming pallid or yellowish. 



On trunks of all kinds ; one of the most common Polypori. Caes- 

 pitose, and densely imbricated, exhibiting a remarkable play of 

 colors from gray or ochraceous to red, blue and various shades of 

 brown. It is readily distinguished by its coriaceous rigid substance 

 and by its shining zones of many colors. 



62. P. pergamenus, Fr. Pileus coriaceous, thin, rigid, appla- 

 nate, contracted at the base, tomentose, subzonate, virgate with 

 innate radiating fibers. Pores at first small, irregular, dentate, 

 purplish ; soon lacerate into plates and bundles of teeth, and chang- 

 ing in color to pale or yellowish brown. 



In woods on trunks of all kinds ; very common. Pileus varying 

 greatly in shape and size, sometimes effuse, reflexed and dimidiate, 

 but when well developed, more or less attenuate at the base, and 



