OF GREAT BRITAIN 



313 



" Approaching L. acvrcogynoides, Krbr. but differs in the colourless thalamium 

 and other characters. Spores .007 — .011 mm. long, .003 mm. broad," {Nyl.) 

 Spores .0065— .009 mm. long, .003 mm. broad. 



191. L. sarcogynoides, Kbr. evanescent; apothecia black, croivded 

 and aggregate, closely adnate, difformi-angulate by close juxta 

 position,, plane, margin thick, prominent, flexuose ; hymenium 

 narrow, bluish-grey ; paraphyses thick, indistinct, conglutinate, 

 apices nigrioant ; hypothecium very thick, nigro-fuscous ; spores 8, 

 colourless, lineari-ellipsoid, simple, minute. 



On granitic maritime rocks, rare. 



Stn:— Korfeer S. L. G. 252. (1855.) Par. 224, 



Exs :— Korb. 47. 



Geog. Distelb ;— Germany. 



Bot. Pbov :— 31. 



Channel Islands : — La Moye, Jersey. Mr. Lwrbalestier. 



192. L. tephrizans, Leight. thallus nearly obliterated, only a 

 few whitish depressed scattered areolae, (K — C — ) ; hypoihallus 

 predominating, cinerascent ; apothecia black, numerous, plane, or 

 slightly concave, prominent, sessile, moderate, margin thickish, 

 eventually obliterated ; hypothecium nigrofuscous, subtended by 

 pale-greyish-blue, hyaline excipulum ; hymenium, thin, pale-greyish- 

 blue ; paraphyses distinct, but coherent, apices liigrofuscous ; 

 spores 8, colourless, narrowly ellipsoid, simple, minute. 



On hard slaty rocks, rare, 1876. 



Stn :— Linn. Trans. 2d. ser. vol. 1. p. 237. 

 Fig :— Linn. Trans. 1. c. tab. 32. f. 3, & 4. 

 Bot. Pbov:— 6... 26. 



Ireland : — Kylemore ! Mr. Lwbalestier. 



Wales : — Llanachar Bridge ! near Fishguard, Pembrokeshire. (1876.) 

 Spores .009 — .01 mm. long, .004— .005 mm. broad. Spermatia minute shortly 

 cylindrical, straight. Gelatina hymenea I dirty-blue. 



B. Spores polari-bilocular. 



193. L. polospora, Leight. white or albo-glaucous, very thin and 

 filmy, effuse, smooth and somewhat shining, unequal or rugulose, 

 (K — C — ) ; apothecia black, minute, scattered, adnate, plane, with 

 a narrow slightly prominent margin, at length plano-convex and 

 immarginate ; hypothecium nigro-fuscous ; hymenium colourless ; 

 paraphyses distinct, thickish, apices globular, nigro-fuscous ; spores 

 8, fuscous, elliptical, with a paler-fuscous roundish cell at each apex. 



On old hawthorns, very rare. 1877. 



Stn :— Leight. in Linn. Trans. 2d. ser. 1. p. 241. 



Pig :— Linn. Trans. 1. c. t. 33. f. 4. 5. 6. 



Ibeland :— Ballinahinch Churchyard ! co. Galway. Mr. Larlalestier. (1877.) 



Much resembling in general aspect Lecidta myriocarpa, D.C. Gelatina 

 hymenea I deep blue. Spores .02— .022 mm. long, .009 mm. broad. The pecu- 

 liar shape and structure of the spores keep it an entirely distinct species. 



C. Spores 1-septate, brown. 

 * Hypothecium dark. 



194. L. canescens, (Dicks.) white or albo-glaucescent, sub-tar- 

 tareous, orbicular, adnate, radiato-plicate, sorediate, circumference 

 truncato-ar repando-lobate, surface generally smooth, minutely 



