304 DECADES OF FUNGI. 
with the exception of Pol. graveolens, from which it differs 
in its pilei, not being spathulate, its softer substance, and 
larger pores, which, though minute, are visible to the naked 
eye. Pol. graveolens occurs on the different species of oak, 
this on beech. 
280. Polyporus (Apus) obductus, n. sp.; pileo sessili reni- 
formi lobato tenui glaberrimo pellicula gelatinoso-cartilaginea 
flavida vestito, sicco fragilissimo, contextu albo; hymenio 
albo, poris laceratis, dissepimentis tenuissimis. 
British North America. Dr. Richardson, 1827. 
Pileus 5 inches broad, 21 inches long, stemless, reniform, 
with a few rounded lobes, thin, about 14 line thick; substance 
white, vanishing completely towards the margin, clothed with 
a yellowish, gelatinoso-cartilaginous pellicle, which under a 
lens is slightly wrinkled, perfectly smooth, very brittle when 
dry, margin extremely thin. Pores white, finely toothed, 
dissepiments extremely delicate, about 4 of a line deep. 
A very curious species, whose nearest affinity is perhaps 
with P. aureolus. When fresh, it is probably a juicy species, 
though very rigid and brittle when dry. The coat of the 
pileus is apparently nearly of the same nature as that of 
Agaricus mastrucatus. 
, 81. Polyporus (Resupinatus) niger, n. sp.; resupinatus 
crassiusculus pileo vix ullo; hymenio nigro; poris minimis 
punctiformibus intus umbrinis, dissepimentis tenuibus. 
On rotten trunks, Ohio, March, 7. G. Lea, Esq. n. 112. 
Elongated, entirely resupinate, except at the very edge, 
where it is slightly raised, dark brown and pubescent; sub- 
stance, where it is not quite obsolete, dark brown. Hyme- 
nium black. Pores very minute, punctiform, 2 lines deep; 
edge very minutely tomentose with black down, umber 
within, dissepiments thin. 
Nearly allied to Pol. tephroporus, (formerly, P. Surinamensis, - 
Mont.) with which it agrees in many respects. The hyme- 
nium, however, is jet-black, instead of cinereous, and the 
inside of the tubes is umber, Like it, it is slightly raised at 
