COLLEMOPSIS. | COLLEMET, 79 
and less developed conditions of Lecanora cervina. In this country it 
Sometimes occurs associated with the preceding species, from which it is 
distinguished by the thallus and the apothecia; though neither of these 
are. well developed in the British specimens. 
Hab. On calcareous rocks in maritime and upland tracts of mountainous 
regions.— Distr. Very local and rare in S.W. Ireland (near Kenmare, co. 
Kerry) and the Central Highlands of Scotland.—B. M.: Craig Tulloch, 
Blair Athole, Perthshire, 
3. C. furfurella Nyl. ex Cromb. Journ. Bot. 1874, p. 332.— 
Thallus effuse, very thinly furfuraceo-granulose, or scattered in 
small furfuraceous verruce, brownish-black or blackish, with some- 
what larger, convex granules intermixed. Apothecia minute, sub- 
pyrenodeo-lecanorine, impressed in the larger granules, concolorous ; 
spores shortly ellipsoid, 0,011-17 mm. long, 0,008-11 mm. thick ; 
paraphyses discrete; hymenial gelatine wine-red with iodine-— 
Nyl. Flora, 1881, p. 453; Leight. Lich. Fl. ed. 3, p. 35.—Collema 
furfurellum Nyl. Sallsk. pro F. et Fl. Fenn. Not. iv. (1859) p. 229 ; 
Lich. Scand. p. 28; Carroll, Journ. Bot. 1865, p.286; Cromb. Lich. 
Brit. p. 3; Leight. Lich. Fl. p. 17. 
The anatomical structure of the thallus shows this plant, at one time 
regarded by Nylander as a distinct section of Collema, to be a Collemopsis. 
The thallus and fructification distinguish it from the allied species. The 
apothecia are numerous, though the spores are rarely found fully deve- 
loped. The spermogones are only sparingly visible, the spermatia being 
thin, oblongo-cylindrical. 
Hab. On moist schistose rocks in alpine places—Distr. Found very 
sparingly amongst the 8, Grampians, Scotland.—B. M.: Above Loch-na 
Gat, Ben Lawers, Perthshire. 
4, C, Arnoldiana Nyl. Flora, 1874, p. 305.— Thallus effuse, thin, 
maculate, granulose, olive-brown or dark-brown. Apothecia small, 
biatorine, somewhat prominent, impressed in the centre, reddish or 
dark-red, the margin paler; spores ellipsoid, oleoso-locular, 0,017— 
20 mm. long, 0,010—0,0105 mm. thick; paraphyses articulate ; 
hymenial gelatine slightly bluish, then pale wine-red with iodine.— 
Cromb. Journ. Bot. 1876, p. 359 ; Leight. Lich. Fl. ed. 3, p. 86.— 
Physma Arnoldiana Hepp, Flora, 1858, p. 94. 
This somewhat resembles Leptogium biatorinum, but is smaller, thinner, 
and with different spores. The thallus is minutely cellular, lax, and 
indistinct in texture. The apothecia, which are nearly gyalectiform, are 
either somewhat scattered or approximate. Verrucaria Flotuviana Hepp, 
Flecht. n. 92 pro parte, Collemopsis Flotoviana Nyl. ea Cromb, Journ. Bot. 
1874, p. 147, scarcely differs from this species. 
Hab. On calcareous stones in shady upland situations.— Distr. Appa- 
rently local and rare in S, and W. England—B. M.: Near Shiere, 
Surrey; near Cirencester and Chalford, Gloucestershire. 
5. C. oblongans Nyl. Flora, 1874, p. 305.—Thallus subeffuse; 
thin, granuloso-crustaceous, confluent, brownish-olive. Apothecia 
