106 
NEW AND RARE BRITISH FUNGI. 
having at the apex a pencil of white fibres. Asci clavate, very 
transparent. Sporidia 8, large, ovate, brovn, nearly opaque, 
somewhat apiculate at each end, '02 mm. long by *012 mm. 
wide. 
158. Dothidea rimosa. Fr. Scirrhia rimosa. Nke. Fckl. S. M., p. 
221. Fr. Syst. Myc. ii.,p. 427. 
Subcuticular, linear, oblong, bursting through the sheath in 
parallel fissures, stroma black, cells minute, crowded. Asci oblong, 
octosporous, *082 x ’014. Sporidia biseriate, oblong, uniseptate, 
hyaline, *02 x '007 mm. 
Forming conspicuous black elongated patches on the stems of 
the common reed. 
On Phragmitis communis. Castle Rising. 1879. 
Scirrhia depauperata , Fckl., is obviously merely, a foliicolous 
condition of this species. 
159. Dothidea frangulse. Fckl. Symb. Myc . , p. 222. 
Stroma erumpent, orbicular, convex or plane, black, opaque, 
grey within. Asci oblong, stipitate, walls of asci thick, *088 X 
*016 mm. Sporidia 8, biseriate, oblong, obtuse at the ends, 
straight, unequally bilocular, not constricted at the septum, pale 
brown, *022 X *007 mm. 
On dead branches of Rhamnus frangula. Shrewsbury. 1875. 
The sporidia of our plant agree in form and size with Fuckel’s 
description, but appearances of secondary septa are observable in 
many instances. 
1G0. Nummularia gigas. n. sp. 
Erumpent, growing from the deeper portions of bark and sub- 
jacent wood, at first orbicular, then ellipsoid and elongate; upper 
surface black, concave, somewhat repand, rough from the prominent 
ostiola ; stroma rather soft, cineritious then whitish. Perithecia 
confined to the lower part of the stroma, crowded, pyriform, 
mutually compressed, with long necks which terminate on the disc 
by prominent rounded black ostiola. 
Asci cylindrical, stipitate, -12-*15 x *012-'015. Sporiferous 
portion -05--06 x '012-*015 mm., sporidia 8, dark brown, uni- 
seriate, oval or subrotund, rather various in form and size, at 
length nucleate, *01-*012 x '008- 01 mm. 
The whole plant is from 3 to 5 cm. long, by 1 cm. wide, and 
from 3 to 5 mm. thick. 
On birch, bursting through the outer bark. Ringstead Downs. 
1876. 
PI. 130, fig. 3, a, specimen natural size, b, section of the same, 
c, asci, d, sporidia. 
161. Diaporthe Chailletii. Nke. Piren. Germ., p. 276. 
Stroma more or less widely effused, forming irregular black 
spots upon the affected stems. Perithecia small, subglobose or 
depressed, abruptly attenuated into a short neck ; ostiola puncti- 
form, scarcely prominent, conical. Asci narrowly clavate, octo- 
sporous, sessile, '042 X *006 mm. Sporidia biseriate, narrowly 
