State Museum of Natural History. 69 



Corticium mutatum, n. sjx 



Effused, forming in-egular extended patches; hymenium tumid 

 when moist, centrally tuberculosa, with more or less evident radiating 

 folds toward the margin, much thinner when dry, nearly even, rimose, 

 dingy yellowish inclining to cream color or slightly tinged with flesh 

 color, the margin byssoid or subfimbriate, white; spores oblong, 

 colorless, straight or slightly curved, .0006 to .0007 in. long, .00016 

 to .0002 broad. 



Dead bark of poplar Populus tremiiloides. Sevey. July. 



The species is related to Corticium keve, but differs in its color and 

 in the character of its spores. It is remarkable for the difference 

 between the fresh moist specimens and the dry ones. In the former 

 the hymenium is so uneven that it is suggestive of Phlebia, but in the 

 latter the folds and tubercules have disappeared and ihe hymenium 

 has become rimose, revealing the white subiculum in the chinks. 

 This change is suggestive of the specific name, 



Corticium Berkeleyi, Cke. 

 Decaying wood of willow, Salix alba. Copake. June. 

 The specimens have been identified by comparison only, as I have 

 seen no description of this species. They are to this extent doubtful. 



Corticium subaurantiacum, n. sp. 



Effused, soft, thin, the tomentose subiculum and margin bright 

 orange; hymenium even, grayish-yellow or orange tinted, having a 

 pruiuose appearance, sometimes slightly rimose when dry; spores 

 subelliptical, .0003 in. long, .0002 broad. 



Dead bark of spruce, Picea nigra. Rainbow. August. 



It bears some resemblance to Merulius subaurantiacus, but there are 

 no folds in the hymenium. 



Corticium. basale, n. sp. 



Effused, closely adnate, tough, at first whitish, the hymenium becom- 

 ing brown with a waxy appearance, the broad margin dingy-white. 



Base of living trees. Whitehall. August. 



It follows the inequalities of the bark from which it is inseparable. 

 It is remarkable for its waxy appearance, but very tenacious sub- 

 stance. It was found on the bases of ash, Fraxinus Americana and 

 basswood, Tilia Americana. The specimens were sterile. 



Peniophora unicolor, n. sp. 



Effused, thin, membranous, soft, subseparable, even, subpulverulent, 

 pale ochraceous, the margin and subiculum concolorous with or a 



