30 NATURAL HISTORY BULLETIN. 



pores generally by the fact that in these the pores unite to form 

 a distinct horizontal stratum. 



1. Trametes serpens Fries. 



Fungus dry, closely adnate, at first erumpent, tuberculiform, 

 orbicular, then confluent, white with a determined pubescent 

 border; pores roundish and angulate, unequal, obtuse; spores 

 large 6x 14- 



Specimens referred to this species occur not infrequently on 

 elm logs, especially those dr}- and decorticate. The general 

 appearance is that of a Poria with very large pores. The 

 general structure, however, is clearly that of Trametes, and 

 details correspond with the description. Specimens are from 

 one to two cm wide and from ten to fifty in length, at first 

 pure white, alutaceous with age. N. A. F. 1707. 



2. Trametes scutellata Schzveinitz. 



Pileus pulvinate, narrow, zonate, yellowish-white, tomen- 

 tose, but at length laccate-glabrate, context thin, almost con- 

 colorous; hymenium concave, white; pores punctiform, dis- 

 sepiments wide, rigid. 



Rare. We have only a single specimen about one inch each 

 wav. pale yellowish-white, but within nearly pure white and 

 finely suberose. The pores are small and very unequal in 

 length. Same as T. ohiensis Berk. 



3. Trametes pini Fries. 



Pileus suberose-lignose, very hard, ungulate pulvinate, con- 

 centrically sulcate, rough from rusty-fuscous becoming black, 

 within 3-ellowish; pores large, roundish-oblong, 3'ellowish or 

 reddish. 



Found on the wood of coniferous trees in various parts of 

 the world. Pines in Iowa are very rare, found only in isolated 

 localities. One of these is on a small hill-top in Muscatine 

 county, and from this locality comes our solitary specimen of 

 the present species. N. A. F. 602. 



.4. Trametes peckii Kalchbrenner. 



Pileus suberose. dimidiate sessile, sub-decurrent, hirsute. 



