Lecidea.] LI CHEN ES. 175 



6. L. cechumcna, Ach. Meth. (confused blach and alive Lecidea); 

 crust determinate tessellated olive-grey with blackish cracks, 

 apothecia black at length convex with a black border of their own 

 substance. Ach. Meth, p. 42. — Lichen ccchununus, E. Bat. t. 1830. 

 — Lecidea, fumosa, Ach. Syn. p. 12. — (3.athrocarpa ; crest deter- 

 minate tessellated pale brownish-olive polished its fragments 

 tumid and angular, apothecia sunk black flattish crowded with 

 a narrow whitish spurious border. Sni — Ach. Lich. Umv, 

 p. 157. 



a. On granite and whin-stone rocks, N. of England, Rev. Mr. 

 Hnrriman. — /3. Rocks in mountainous places, Durham, Rev Mr. lbnrl- 

 man. — The /3. athocarpa Mr. Borrer observes, " Acharius makes a var. of 

 Ij.ccehumcna in Lich. Univ. and in the Synopsis joins the two ami giv< - 

 them as a synonym of L. fumosa. He also quotes the Lichen gihhosus. 

 Dicks, as sent by Harriman." I know too little of these Lichens to offer 

 an opinion. If such men as Acharius and Borrer are in doubt about a 

 common Lichen, who then shall venture to decide'? 



7. L. petrcea, Ach. (rock Leridea); crust thin orbicular mi- 

 nutely waited somewhat powdery white, apothecia innate with 

 the crust protuberant somewhat concentric black. Ach. Syn. 

 p. 13. — Lichen petrceus, Jacq. Coll. v. 3. p. 116. t. 6.f.'2. L. 

 Lichen concentricus, Davie s. — Dicks. — E. Bo', t. 246. 



Rocks and stones, Mr. Dickson. 



8. L. confluent, Ach. (confluent- shielded Lecidea); cruel 

 somewhat uneven tessellated of a smoky white, apothecia sessile 

 black with a black border at length convex confluent and angu- 

 lar. Sm. — Ach. Syn. p. 16 Lichen confltiens, E. Bot. t. 1964. 



On rocks and stones, frequent.— Acharius observes that the crust is 

 sometimes suffused with an ochraceous tinge and that sometimes it is 

 wanting. 



9. L. lapicida, Ach. (contiguous-shielded Lecidea); crust 



glaucous-white tessellated and granulated depressed flattish 



angular black with a narrow black elevated border. Sni. — 



Arh. Syn. p. 13 Lichen contiguvj, E.li»i.t. S21. (ruj Ver- 



rucaria contigua, Hqffm.) — (3. diacapris} crust bluish-white tar- 

 tareous it- surface composed of minute undulations, apothecia 



clustered somewhat sunk, their dUk Hat black or brown their 

 hordrr thick externally black its inner edge whitish. S/n. — 



Urceoiaria diacapsis, Ach. Syn, j>. 142. — Lichen diacapsis , /.'. 

 lint. t. 1954. 



On brick-walls.— -0. Lancashire an. I Durham. — At the -uu'-re-tinn of 

 Mr. Borrer I refer the Lichen diacapsis, L. l><>t. ( Urceolmrim, ./<■//.) to 



this species! — the Yenucana conti«uu, the >anie Botanic C0mis\srS M 



belonging to Lcc. vjridinfya, .t</i. 



H>. L. janniiiiiihi. Borr. (mvnunent tnuiu-shielded warty Le- 

 ddea); crust thin somewhat tartareous minutelv wart] smokr- 

 mi.-\ »»r brownish, apothecia superficial small black internally 

 x\<'\, disk tlat. tie- border slightly elevated neatly twliftf Burr, 



