258 CYCLOCARPINEE [RINODINA 
Flora lvi. p. 19 (1873) ; Cromb. in Grevillea i. p. 141 & Monogr. i. 
p. 399; Leight. Lich. Fl. ed. 3, p. 216. 
Exsice. Cromb. n. 158. 
Included by several systematists in Buellia, but the apothecium 
is rather more lecanorine than lecideine in structure: there are 
traces of the thallus enclosing the apothecium and the subhymenial 
layer is very thick and colourless and contains a few scattered 
gonidia; the spores are of the Rinodina type with contracted 
contents, though that character seems also to occur in some Buellia 
specimens. Generally compared with Buwellia coniops, but the 
thallus more nearly resembles some states of Lecidea rivulosa. 
Hab. On siliceous rocks in maritime districts.—Dvzstr. Here and 
there on the coasts of the British Isles—B. M. Jersey; Alderney ; 
Sark; St. Merryn and near Penzance, Cornwall; near Portlethen, 
Kincardineshire ; Kinsale, Cork; Connemara, Galway. 
On turf, ete. 
18. R. Conradi Koerb. Syst. Lich. Germ. p. 123 (1855).— 
Thallus effuse, thin, granular-leprose or minutely warted, grey 
or greyish-brown (K —). Apothecia small, plane, dark-brown, 
the thalline margin entire or somewhat wrinkled ; paraphyses ~ 
conglutinate, slightly clavate, branched, septate and brown at 
the tips ; spores ellipsoid-fusiform, 1-septate, but the two loculi fre- 
quently constricted in the middle giving the appearance of septa- 
tion, or their cell contents much broken up, dark-brown, large, 
20-35 p long, 10-15 p thick.—Lecanora pyreniospora Nyl. in Vet. 
Ak. Forh. 1860, p. 297, note? Cromb. Lich. Brit. p. 49; Leight. 
Lich. Fl. p. 230 ; ed. 3, p. 222. L. diplinthia Nyl. in Act. Soc. 
Sci. Fenn. vii. p. 444 (1863)? Leight. Il. c.; Cromb. Monogr. i. 
p. 401. ZL. Conradi Nyl. in Not. Siallsk. Faun. et Fl. Fenn. 
Forh. xi. p. 182 (1871); Cromb. Monogr. i. p. 400. 
Exsicc. Larb. Cesar. n. 78 & Lich. Hb. nos. 263, 302. 
Distinguished by the habitat and by the large and somewhat 
peculiar spores. They have been described as 4-celled, but it is 
merely that the lumen of each cell is constricted in the middle. Our 
specimens of Lecanora diplinthia agree with the above; I have not 
seen Nylander’s plant. 
Hab. On decayed turf, on mossy ground, on excrements of sheep, 
etc., in maritime and inland districts.—Distr. Rare in Channel 
Islands, E. England and 8. Wales.—B. M. La Moye, Jersey ; 
Eperquerie, Sark; Brandon Park, Suffolk; Thetford Warren, Norfolk. 
Orper XII. LECANORACEA. 
Thallus crustaceous or squamulose, variously coloured. Struc- 
ture more or less stratose, corticate above or non-corticate, 
attached by hyphe to the substratum. Algal cells Chlorophycez. 
Apothecia superficial or at first immersed in the thallus, discoid, 
