484 PYRENOCARPE® [| POLYBLASTIA 
not tinged with iodine.—Verrucaria addubitans Stirt. in Scott. 
Nat. v. p. 220 (1880). 
On decorticated wood near Kinloch Rannoch, Perthshire. 
MICROGLANA Koerb. (Part 2, p. 308.) 
3A. M. nuda Wheld. & Trav. in Journ. Linn. Soe. xliii. p. 132 
(1915).—Thallus obsolete or reduced to a few cinereous granules 
at the base of the perithecia. Perithecia minute, black, super- 
ficial, dimidiate, with a distinct somewhat depressed ostiole ; 
paraphyses subpersistent, visible until the spores are fully formed, 
branched, slender ; asci subcylindrical; spores 8 in the ascus, 
irregularly arranged in the ascus, 2—3-septate and after a time 
sparingly and irregularly septate longitudinally, colourless or 
pale-greenish, oblong-ellipsoid, obtuse at both ends, the separate 
cells unequal, 16-20 y» long, 6-7°5 » thick. Specimen not seen. 
Hab. On half-buried gritstone pebbles in glacial drift on the banks 
of the Ribble at Chatburn (March, 1913). 
3s. M. breadalbanensis Wheld. & Wils. in Journ. Bot. liii. 
Suppl. p. 71 (1915).—Thallus pale citrine-yellow, smooth, broken 
into scattered or more contiguous subangular fragments, each 
bearing one or rarely two perithecia. Perithecia small, sub- 
globose, slightly immersed at the base, black; peridium black, 
thick above, thinner towards the base where it forms a thin 
brown line; ostiole poriform, slightly protuberant but hardly 
papilleform ; spores 6-8 in the ascus irregularly biseriate, colour- 
less, ellipsoid-oblong, obtuse at one or both ends, 6—7-septate 
with 1-3 longitudinal septa, 18-20 » long, 10 » thick. Specimen 
not seen. 
Hab. On mica-schist rocks, growing amongst Lecidea contiqgua in 
larger or smaller patches. Collected by A. Wilson at Ben Cruichben, 
near Killin, Perthshire, June, 1913. 
Orper XXIX. PYRENULACEA, (Part 2, p. 312.) 
ACROCORDIA Massal. (Part 2, p. 313.) 
4a. A. monensis Wheld. in Lance. Nat. viii. p. 196, Pl. 3 
(1915).—Thallus greyish-white, thin, tartareous, pulverulent, or 
nearly obsolete when it consists of a few granules round the base 
of the perithecia. Perithecia black, nearly globose, very small, 
prominent, slightly immersed at the base or sessile, smooth, 
scattered ; ostiole poriform ; peridium entire, black, brown inter- 
nally ; paraphyses numerous, slender, lax, distant; asci cylin- 
drical, elongate, 99-120 » long; spores uniseriate or partly 
biseriate, fusiform-ellipsoid, colourless, 1-septate, constricted at 
