42 CYCLOCARPINEX [PSOROTICHIA 
scattered granules, sometimes intermixed with larger, brownish- 
black. Apothecia minute, impressed in the granules, concolorous 
with the thallus, with a thick connivent margin ; spores ellipsoid, 
rarely well-developed, 11-17 yp long, 8-11 p» thick; hymenial 
gelatine wine-red with iodine.—Oollema furfurellum Nyl. in Not. 
Sallsk. Faun. & FI. Fenn. iv. p. 229 (1859); Carroll in Journ. 
Bot. ii. p. 286 (1865); Cromb. Lich. Brit. p. 3 & Monogr. i. 
p- 79; Leight. Lich. Fl. p. 17. Collemopsis furfurella Nyl. ex 
Cromb. in Journ. Bot. xii. p. 332 (1874); Cromb. Monogr. i. 
p. 79; Leight. Lich. Fl. ed. 3, p. 35. 
More distinctly granular and scattered than either of the preceding 
species, differing also in the habitat. 
Hab. On moist schistose rocks in alpine localities. -B. M. Above 
Loch-na-Gat, Ben Lawers, Perthshire. 
3. Ps. diffundens Sydow Flecht. Deutschl. p. 324 (1887).— 
Thallus effuse, thin, with minute granular squamules, cracked- 
areolate, bliicke: Apothecia ae innate, somewhat plane or 
marginate, reddish, pale within ; spores ellipsoid, 16-23 p long, 
7-11 p» thick ; hyménial gelatine bluish, then wine-red with 
iodine. —Pyrenopsis diffundens Nyl. in Flora xlviii. p. 602 (1865) ; 
Carroll in Journ. Bot. iv. p. 22 (1866); Cromb. Lich. Brit. p. 3 ; 
Leight. Lich. Fl. p. 15. Collema diffractum Nyl. ex Carroll in 
Journ. Bot. iii. p. 287 (1865). Collemopsis diffundens Nyl. ex 
Cromb. in Journ. Bot. xii. p. 332 (1874) ; Leight. Lich. Fl. ed. 3, 
p- 36 ; Cromb. Monogr. i. p. 80. 
The specimens in the British Museum are sterile. The plant has 
not been found again at Maidstone, Kent, where it was first discovered. 
Hab. On sandstone and schistose rocks.—Distr. Rare in S$.E. 
England and N. Wales.—B. M. Barmouth, Merioneth. 
4. Ps, bia Forss. in K. Vetensk.-Soc. Nova Acta, 
ser. 3, xili. n. 6, p. 77 (1885).—Thallus “effuse, thin, granular- 
areolate or nearly Be ae and somewhat scabrous, dark- 
brown or brownish-black. Apothecia small, concolorous with the 
thallus, the margin prominent, connivent ; spores 4 to 8 in the 
ascus, ellipsoid, rather large, 12-20 p long, 6-11 p thick ; 
hymenial gelatine bluish with iodine.—Lecanora pyrenopsoides 
Nyl. in Bot. Not. p. 163 (1853). Pyrenopsis lecanopsoides Ny). 
in Flora lxix. p. 374 (1866); Carroll in Journ. Bot. v. p. 254 
(1867); Cromb. Lich. Brit. p. 3; Leight. Lich. Fl. p. 15. 
Collemopsis lecanopsoides Nyl. ex Cromb. in Journ. Bot. xii. 
p. 332 (1874) pro parte; Cromb. Monogr. i. p. 78 pro parte ; 
Leight. Lich. Fl. ed. 3, p. 35 pro parte. 
\ specimen from Craig Tulloch, Perthshire, was relegated to this 
species, but examination shows that the thallus contains Scytonema 
and not Glawocapsa, and is therefore a species of Porocyphus. 
Hob. On ealeareous rocks in maritime and mountainous regions 
(Kenmare, Kerry). 
