168 LKCANO-LKCIDKKI [bUELLIA 



Leigliton's Kxsicc. n. 189 (L. vrrruculosa) under L. leucocUnella , but 

 the British MuReuni specimen is a form of liJdzocarpon confervoidcs. 

 There arc no authentic specimens in tlie lierbarium except tliose 

 cited from Lcighton. 



Hah. On rocks. — Distr. Eare in Central England and Wales. — 

 B. M. Lyth Hill, Shropshire ; Bettws-y-Coed, Carnarvonshire. 



6. B. discolor Koerb. Parerg. Lich. p. 185 (I860).— Thallus 

 pale-greyish-brown, thin, tartareous, minutely cracked-areolate or 

 almost continuous, the areolae plane (K + yellow, CaCl -|- yellow), 

 limited by a more or less conspicuous dark-brown hypothallus. 

 Apothecia blackish-brown, minute, numerous, adnate or subinnate, 

 plane with a thickish persistent margin ; hypothecium colourless ; 

 paraphyses distinct, dark-brown at the apices ; spores ellipsoid, 

 almost colourless, then dark-brown, the large guttulae of the cells 

 connected by a tube, 0,019-21 mm. long, 0,010-11 mm. thick. — 

 Lecidea discolor Hepp Flecht. Eur. nos. 319 & 320 (1857) ; Leight. 

 Lich. Fl. ed. 3, p. 325. 



Exsicc. Johns, n. 356. 



Hab. On rocks and stones. — Distr. Somewhat rare in S. and N. 

 England and S. Ireland. — B. M. Sea-banks between Whitehaven and 

 St. Bees, Cumberland. 



7. B. Interpolata A. L. Sra. — Thallus determinate, blackish- 

 brown or black, minutely squamulose-areolate, the areolae 

 appressed, contiguous or dispersed, hypothallus black. Apothecia 

 black, small adnate, plane, marginate ; hypothecium colourless ; 

 paraphyses slender not well discrete, the apices clavate, brownish- 

 black ; spores ellipsoid, greenish or dark-brown, the large guttulae 

 of the cells sometimes conjoined by a tube ; hymenial gelatine 

 blue then dark-violet, the asci wine yellow, with iodine. — Lecidea 

 interpolata Stirton in Scott. Nat. iv. p. 165 (1877); Leight. 

 Lich. Fl. ed. 3, p. 326. Specimen not seen. 



Hab. On rocks. Collected by Dr. Stirton near Garve, Eossshire. 



8. B. biloculata A. L. Sm. — Thallus in patches, effuse, silvery- 

 white, Apothecia black, adnate, small, marginate ; hypothecium 

 brown : paraphyses clavate and brown at the apices ; spores 

 ellipsoid-fusiform, brown, the two cells connected by a tube, 

 0,015-18 mm. long, 0,008 mm, thick ; hymenial gelatine deep 

 blue with iodine. — Lecidea biloculata Nyl. in Flora Ix. p. 460 

 (1877); Cromb. in Grevillea vi. p. 113. Specimen not seen. 



Hab. On bark of holly. Collected by Larbalestier near Kylemore, 

 Connemara, Galway. 



9. B. polospora A. L. Sm. — Thallus white or glaucous- white, 

 thin, filmy, effuse and somewhat shining, unequal or wrinkled 

 (K — , CaCl — ). Apothecia minute, black, plane, v/ith a narrow, 

 slightly prominent margin becoming somewhat convex and 



