254 CYCLOCARPINEE | RINODINA 
9, R. demissa Arn. in Flora lv. p. 54 (1872).—Thallus thin, 
effuse, granulate or leprose or almost wanting, brownish or dull- 
grey, with a concolorous or darker hypothallus. Apothecia 
numerous, crowded or scattered, minute, the dise blackish, 
becoming convex and prominent, the thalline margin thin, entire, 
persistent or disappearing ; paraphyses clavate, septate and brown 
at the tips; spores oblong-ellipsoid, sometimes constricted in the 
middle, 12-16 p long, 5-9 pw thick.—Lichen exiquus Sm. Engl. 
Bot. t. 1849 (1808) pro parte (non Ach.). BR. metabolica vay. 
demissa Koerb. Syst. Lich. Germ. p. 124 (1855).  Lecanora 
exigua £. demissa Stiz. in St. Gall. Nat. Ges. 1881, p. 359; 
Cromb. in Grevillea xviii. p. 46 (1889) & Monogr, i. p. 596. 
L. sophodes var. levigata Cromb. Lich. Brit. p. 49 (1870) (non 
Ach.) ; f. laevigata Leight. Lich. Fl. ed. 3, p. 215 (1879) ; subsp. 
levigata Cromb. in Grevillea xviii. p. 46 (1889) (non Stiz.) & 
Monogr. i. p. 395. 
Exsicc. Johns. nos. 196, 367; Larb. Lich. Hb. n. 261; Mudd 
n. 107. 
Under this species have been grouped the specimens that were 
regarded as saxicolous forms of Rt. exigua. It is distinct in habitat 
and in the dark, sometimes very scant or absent thallus, also in the 
more convex development of the apothecium. 
Hab. On various rocks, sandstone, granitic, slate, ete., in 
maritime and inland districts.—Dzst. Not uncommon throughout the 
British Isles—B. M. Chateau Point, Jersey; Vale, Guernsey; ~ 
Lueccombe and Shanklin, I. of Wight; Henfield, Sussex; Ulting, 
Essex; near Cirencester and Charfield, Gloucestershire ; Barmouth, 
Merioneth; near Brandon, Suffolk; Aber-Ty-Glyn, N. Wales; near 
Ayton, Cleveland, Yorkshire; Port Soderick, I. of Man; St. Bees, 
Cumberland; I. of Lismore, Argyll; Portlethen, Kineardineshire ; 
Carrigaloe, Cork; Portmarnock, Dublin; Cleghan, Connemara, 
Galway. 
10. R. equata Oliv. Lich. Eur. fase. 2, p. 177 (1909).— 
Thallus effuse, thin, smooth, greyish-white, often scarcely visible 
or obsolete (Kf + yellow). Apothecia small, thinly marginate, 
becoming convex, blackish or dark-brown, whitish within ; 
spores broadly ellipsoid, 16-20 p long, 10-11 p thick ; hymenial 
gelatine deep blue with iodine.—-Lecidea coniops var, equata Ach. 
Lich. Univ. p. 171 (1810). LZ. equata Nyl. ex Cromb, in Journ. 
Bot. xii. p. 149 (1874). Lecanora zequata Nyl. in Flora Ixvii. 
p. 392 (1884) ; Cromb. Monogr, i, p. 401. 
The above description is taken from Crombie. The only specimen 
named L. equata in the herbarium of the British Museum agrees 
outwardly with the description, but the apothecia are truly lecideine 
into which no gonidia have entered, and with a dark-brown hypothe- 
cium; the spores also are much smaller, about 12 » long and 5 p» thick. 
It is a Buellia, similar to Buellia micraspis Anzi Exs. Lang. n. 197. 
That species has been cited by Th. Fr. (Lich. Seand. p. 601) as 
synonymous with B. saratilis; but the latter has a much more 
