Lecanora.] LICHENES. 187 



what lobed deformed, apothecia concave brownish- black the 

 border rather acute coarctate crenulate. Ach. Syn. p. 147. 

 Grev. Fl.Edin.-p. 331. 

 On stones in walls, about Edinburgh, Mr. Maughan (in Fl. Ed'uu). 



3. L. extgua, {diminutive black-shielded Lecanora); crust or- 

 bicular radiating thin leprous uneven dull ash-coloured, apothe- 

 cia minute clustered full-black at length rather convex their 

 border white at length brownish. Sm. — Lichen exiguus, Ach. 



Prodr E. Bot. t. 1849. — Lecanora periclea, (3. Ach. Syn. 



p. 151. 



On tiles and old pales. 



4. L. periclea, Ach. (rough black-shielded Lecanora); crust 

 diffuse thin leprous very white, apothecia convex very black 

 roughish with a white crenated at length powdery border. Ach. 

 Syn. p. 250, (a.) — Lichen pericleus, E. Bot. t. 1850. 



On old pales or posts, or the bark of fir, Hurst-pierpoint, Sussex, 

 Mr. Borrer. Livermere, near Bury, Rev. G. R. Leathes. 



5. h.coarctdta, Ach. (contracted Lecanora); crust spreading 

 thin cracked unequal greyish, apothecia with the disk somewhat 

 immersed at length elevated flat black the border elevated in- 

 flexed coarctate irregular pulverulent. Ach. Syn. p. 149. — 

 Lichen coarctatus, E. Bot. t. 534. 



On brick walls about Yarmouth, Mr. 1). Turner. 



6. L. sqitamulosa, {scaly-crusted Lecanora); crust imbricated 

 cracked smooth brownish ash-coloured, its fragments angular 

 and somewhat lobed, apothecia sunk at length elevated flattisb 

 of a brownish shining-black (with an elevated wavy border). 

 Sm. — Lichen squamulosus, E. Bot. f. 2011. — L, piceus, Dicks. 

 Cr. Ease. 4. /;. 22. t. 12. /. 5. — Ia<<iu<>ik bad/a, Ach. Syn. 

 j j, L54? — L. cervina, Ach. Syn. p. 188? 



Rocks, North of England and Highlands of Scotland.— This has 

 BOmewhat of the crust ofa Sqttamaria t and hence it is probably Lecanora 

 cervina of Ach., under which he quotes it; but it agrees equally well 

 with that author's description of L. badia, and lu- gives, as a synonym 

 to that species, tin- Lichen piceta of Dicks., which I presume, beyond all 

 doubt, to be our plant. 



7. L. milvina, Ach. (wide-spreading Rock Lecanora); crust 

 tartareous thin even areolate grey or brown with a black filmy 



Substratum, apothecia -mall nearly flat the border entire the 



disk dark-brown. Borr.—Ack. Synup. 151. u.) Borr.in I?. H<>t. 

 Suppl i. 2662./ I. 



On grej t!int\ slate-rock, Ireland, Mitt llutchins. — The / - 



imVvina, Ach. is tin- Lecidea privigna of this work.whhh was 

 confounded in E. Hot. with Lecidea tmplex, " It scarce)) belongs to 



the present species, yet we an- not prepared to sej that it A<n^ not." 

 // r. 



B. I., mpdspila, Ach. (loose branchy-crusted LcrtiHura); crusl 

 tattareovs ragged with branch-like granulations brownish-gro) 



