312 DECADES OF FUNGI. 
ture ; ostiola forming a little tuft rather elongated umbilicate 
finely grooved, granulated. Asci lanceolate ; sporidia minute 
carved like those of S. verruceformis. _ 
A very neat species distinguished at once from Sp. carpini 
by its prettily granulated ostiola; but above all by its minute 
curved not lanceolate sporidia. It approaches also S. deci- 
piens, D. C. especially as regards the ostiola, but not to 
mention the difference of habit, the spores in that species 
are dark and elliptic with one side flat, not colourless and 
curved. 
98. Sphæria (Circumscriptæ) fulvo-pruinata, n. sp. pustulata, 
subangulata basi effusa; peritheciis oblongis collo elongato; 
stromate discoque ostiolis punctato fulvis; sporidiis ellipticis 
uniseptatis. 
On dead Platanus occidentalis. Ohio. No. 126. T. G. Lea, 
Esq. 
Forming somewhat angular pustules about a line broad 
rather effused at the base as seen through the thin cuticle ; 
disc angular tawny pulveruleht pierced by the black puncti- 
form ostiola ; stroma tawny like the disc; perithecia globose. 
Asci linear, sporidia elliptic uniseptate with a single globose 
nucleus in each cell. À 
99. Sphæria (Confluentes) rhizogena, n. sp. suborbicularis 
atro-fusca stromate pallido, peritheciis globosis primum cer- 
vino-pruinosis demum supra atro-fuscis, subtus pallido- 
fuscis papilla subtili abrupta quandoque depressa; intus 
pallido-fuscis. 
On the roots of Gleditschia triacanthos, washed bare by 
the Ohio freshets. Ohio. No. 132. T. G. Lea, Esq. 
_ Patches nearly orbicular 2 lines or more broad with their 
surface rather irregular, here and there depressed ; stroma 
pale yellowish brown; perithecia minute dull not shining, 
partially immersed, pale brown when shaded from the light, 
nearly black above at first prunose, globose with a minute 
and sometimes depressed papilla, filled with pale brownish 
jelly ; asci linear, sporidia elliptic. | 
This species has exactly the habit of Spheria Laburni, but 
