168 LECANO-LECIDEEI ' [bUELLIA 



Leighton's Exsicc. n. 189 {L. vemtculosa) imder L. leiicoclinella, but 

 the British Museum specimen is a form of Bhizocarpon confervoides. 

 There are no authentic specimens in the herbarium except those 

 cited from Leighton. 



Hob. On rocks. — Distr. Bare ia Central England and Wales. — 

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



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

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

 almost continuous, the areolse plane (K + yellow, CaCl + yeUow), 

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

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

 plane with a thiekish persistent margin ; hypotheciura colourless ; 

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

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

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

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

 Lich. Fl. ed. 3, p. 32.5. 



Exsicc. Johns, n. 356. 



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

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

 St. Bees, Cumberland. 



7. B. inteipolata A. L. Sm.- — ThaUus determinate, blackish- 

 brown or black, minutely squamulose-areolate, the areolse 

 appressed, contiguous or dispersed, hypothallus black. Apothecia 

 black, small adnate, plane, marguiate ; 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 ia Scott. Nat. iv. p. 165 (1877); Leight. 

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



Hah. On rocks. Collected by Dr. Stirton near Garve, Kossshire. 



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

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

 brown : paraphyses clavate and brown at the apices ; spores 

 eUipsoid-fusiform, brown, the two ceUs connected by a tube, 

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

 blue with iodine. — Lecidea hiloculata Nyl. in Mora Ix. p. 460 

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



Hah. On bark of hoUy. CoUected by Larbalestier near Eylemore, 

 Connemara, Galway. 



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

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

 (K — , CaCl — ). Apothecia minute, black, plane, with a narrow, 

 sUghtly prominent margin becoming somewhat convex and 



