LElAXORA.] LKCANO-LECIDKKr. 401 



mm. loug, 0,010-11 mm. thick; paraphyses not very discrete, 

 brownish at the apices. — Crumb. Grevillea, xviii, p. 47. — Rinodina 

 Conradi Koerb. Syst. Lich. Germ. (l^^So) p. 123. Lecnnora pyre- 

 niospura Xyl. Cromb. Lich. Brit. p. 4U ; Leight. Lich. F]. j). 230, 

 ed. 3, p. 222.— Brit. Kcs. : Larb. Cccsar. n. 78 ; Lich. Hb. n. 203. 



Closely resembles L. turfacea var. orch<pn Ach., which does not occur 

 in our Islands, but differs in the charafter of the spores. Thp; thallus, 

 which elsewhere varies in thickness, is in our specimeus thin and at times 

 almost obliterated The apothecia are either scattered or crowded, the 

 young spores being 1-septate. 



Hab. On decayed turf and the ground, rarely on old excrements of 

 sheep, in maritime and upland districts.— Z)/sfr.' Local and sparindv in 

 the Channel Islands, E. England, aud S. Wales.— B. M. : La Move, Jersey ; 

 Islands of Sark and Jethou. Thetford Warren, Norfolk. 



72. L. diplinthia Xyl. Ann. Sc. Xat. t. xix. (1863) p. 316.— 

 Thallus indeterminate, thin or thiunish, unequal or subgranulose, 

 pale-gre%-ish or pale-whitish (K — , CaCl — ). Apothecia small, plane, 

 brown (internally pale), the thalline margin entire ; spores ellipsoid, 

 4-locular (the two apical Iqculi simple, the two central each with 2 

 or sometimes 3 transverse cells), 0,1123-3-1 mm. long, U, 012-16 mm. 

 thick ; paraphyses scarcely discrete, — Leight. Lich. Fl. p, 230, ed. 3, 

 p. 222. 



An interesting plant, formerly known only corticolous from New 

 Granada, S. America. It is allied to the preceding species, but differs in 

 the character of the thallus, and in the smaller apothecia wich their entire 

 thalUne margin. The two British specimens seen are fragmentary, but 

 with numerous, crowded apothecia. 



Hab. On the ground in fissures of rocks in a maritime di.*trict. — Distr. 

 Extremely local and scarce in one of the Channel Islands. — B. M. : The 

 Eperquerie and D'lxcart Bay, Island of Sark. 



73. L. Tunbrinofusca Xyl. Flora, 1860, p. 3S9.— Thallus deter- 

 minate, thin, subcontinuous or obsoletely rimulose, umbrine-brown 

 or umbrine-blackish (K — ,CaCl — ); hypothallus subplumoso-radi- 

 ating, leaden-coloured, usually limiting the thallus. Apothecia 

 lecideoid, minute, adnate, black, submarginate ; spores brown, 

 0,010-11 mm. long, 0,006-7 mm. thick; epithecium brown ; hypo- 

 thecium colourless. — Cromb, Grevillea, x. p. 23. 



Looks quite a Lecidea, though the young apothecia are sublecanorine. 

 The spermogones ha\ e not been seen, but it evidently belongs to this 

 section, near to L. yrisenfusca Xyl., a Finland plant, to which it seems 

 closely related. It forms small, dark maculae upon the substratum, 

 which here and there become subconliuent. The single specimen seen is 

 well fertile. 



Hab. On sihceous stones in an upland tract. — Distr. Found only very 

 sparingly in E. England. — B. M. : Thetford Warreu. Xorfolk. 



74. L. aequata Xvl. Flora, 1884, p. 392.— Thallus effuse, thin, 



2d 



