58 DECADES OF FUNGI. 
ing of loosely interwoven, cottony threads, at length more 
compact and smooth. Aculei 1-1 line long, compressed, 
sometimes very acute, sometimes very obtuse and obscurely 
penicillate, of a pale ochre. 
This species resembles somewhat resupinate forms of H. 
ochraceum; it has, however, the habit of H. farinaceum, but 
the aculei are much larger. In one specimen the aculei are 
much élongated, darker, and extremely acute.  % It grows,” 
says Mr. Drummond, “inside of decaying trunks of Black-boy. 
The outer crust of the Black-boy, charred as it always is and 
cemented together with gum, affords little nourishment to 
any vegetable, but the pith is of a different description. The 
fungus arranges itself inside of the outer covering, but re- 
ceives its nourishment from the pith. Where it qms it is 
entirely in the dark." 
46. H. dispersum, n. sp.; totum resupinatum ; yabidi 
tenui ceraceo demum evanescente ; aculeis mediis basi fasci- 
culatis compressis apicibus subulatis, —Drumm. n. 207. 
On very decayed wood. 
Forming long patches. Subiculum very thin, ceraceous, 
but frequently obsolete or entirely evanescent. Aculei fasci- 
culate at the base, compressed, subulate above, about 4 a line 
long, tawny when dry, but probably white and transparent 
when fresh. 
It appears to be a very distinct species. The aculei follow 
the lines of the cellular tissue of the wood, and form more - 
or less distinct rows. Hence it has somewhat the habit of - 
an Jrpex. T 
47. H. Isidioides, n. sp. ; totum resupinatum subiculo crus- … 
taceo albo margine subfimbriato à matrice frustulatim separa- 
bili; aculeis brevibus obtusis primum distinctis, dein Pic ^ 
entibus,— Drumm. n. 149. i 
On the Hymenium of Pol. grypheiformis. We 
Forming a thin crustaceous stratum about 4 inches — 4 
cracking only where the matrix cracks, and separable in small — 
fragments, especially towards the centre. Aculei short, cy- - 
lindrical, obtuse, at first scattered, at length crowded. This — 
