OF GREAT BRITAIN. 447 



On wet rooks, frequent. 1833. 



Stn : — Thelotrenm, Whlnb. in Ach. Meth. Suppl. 30. (1803.) Verrucaria, 

 Whlnb. Lapp. 465. Nyl. Scand. 272. 



Fig :— E. Bot. Suppl. t. 2768. Hepp Sporen t. 12. f. 95. 



Exs :— Schaer. 521. Arn. 421. Anzi It. S. 368. Hepp 95. 



Geog. Distrie : — Sweden, Switzerland, Bavaria, Germany, Italy. 



Bot.Prov:— 1, 2, 3.. .6, 7...11...14...19...24— 26...30, 31. 



England : — Hind Head ; near Abinger, Surrey ; above Rundhurst at foot 

 of Black Down; in Harting Comb ; and Edburton, Sussex. Mr. Borrer. (1833.) 

 North of England. Mr. Woods, near Dartmouth, Devon. Mr. Parfitt. Symond's 

 Yatt. Mr. W. Joshua. Longmynd! Shropshire. 



Scotland : — Habishow near Edinburgh. Dr. Maingay. Morrone ; Glen Tilt. 

 Bev. J. M. Crombie. 



Ireland : — Bantry. Miss Hutchims. Barclay's Bock, co. Down. Adm. Jones. 

 Kilkee, Clare ; Ballinhassig, Cork ; and on Caher, Mc Gillicuddy's Reeks ; 

 Blackwater Bridge, Kerry. Mr. Carroll. Ardglass co. Down. Dr. Maingay. near 

 Westport ! co. Mayo. Mr, Larbalestier. 



Walks : — Trefriw falls ! Capel Arthog ! 



Channel Islands : — Noirmont and St. Ouen's, Jersey ! Jerbourg, Guernsey, 

 Mr. Larbalestier. 



"Spores .024—35 mm. long, .010— .016 mm. broad." (Nyl.) Spores .026 

 mm. long, .014 mm. broad. 



Var. cethiobola, Whlnb. similar to the type, but the ostiola of 

 the apothecia are more denuded, black ; the apothecia prominent, 

 and only immersed at the base ; epithecium larger, depressed, um- 

 bilioate ; spores much smaller. 



On wet rocks, frequent. 



Stn :— Whlnb. in Ach. Meth. Suppl. 17. (1803.) Lapp. 465. Nyl. Scand. 272. 



ElG :— Hepp Sporen t. 11. f . 94. 



Exs :— Paler thallus :— Hepp 94. Arn. 51. Zw. 29. Leight. 34. Schser. 590. 



Rufo-fuscescent thallus :— Fellm. 215. 216. Schaar. 522. Anzi Langob. 245. 

 Hepp 689. Zw, 212. 



Geog. Distrib: — France, Switzerland, Germany, Hungary, Italy, Bavaria, 

 E. Lapland. 



Bot. Prov :— 2...5...7...10...19...26...31. 



England : — Isle of Wight ! Rev. T. Salwey. Cleveland Lodge ! Mr. Baker. 

 near Ayton, Cleveland. Mr. Mudd. Downton Castle Woods ! Shropshire. 



Ireland : — Blackwater Bridge and Dunkerron. Dr. Taylor. Curraghmore. 

 Adm. Jones. Connor Cliffs and Caher, Kerry ; BalKnhassig Glen, Cork. Mr. 

 Ca/rroll. near Letterfrack ! Lettermore ! Mr. Larbalestier. 



Wales : — Pen Trwyn ! Great Orme's Head. 



Channel Islands : — Rozel Bay ! Jersey. Mr. Larbalestier. 



It iB often difficult to separate this variety from the type, and its differences 

 seem to consist principally, so far as external character, in the ostiola of the 

 prominent apothecia being more denuded. V. hydrela seems identical. There 

 are two states, one in which the thallus is pale-brown like the type, the other 

 in which it is fuscescent or rufo-fuscescent. Paler thallus : — Spores .017 — .027 

 mm. long, .006— .013 mm. broad. Rufo-fuscescent thallus : — Spores .016 — .031 

 mm. long, .009— .015 mm. broad. " Spores .014—24 mm. long, .007— .010 mm. 

 broad." (Nyl.)- 



Var. papUlosa, Ach. pale-greyish-brown, subtartareous, rugulose, 

 continuous or rimwlose ; apothecia large, hemispherical, truncate, 

 semirimmersed in thalline elevations; ostiolum black, denuded; 

 epithecium poriform, large, impressed ; spores larger than in var. 

 osthiobola. 



On rocks, rare. 



Stn :— Ach. L. U. 286. (1810.) Leight. Ang. Lich. 54. 



Fig :— Leight. Ang. Lich. t. 24. f . 1. 



Exs :— ZW. 361. 



Geog. Distrib:— Switzerland, Germany. 



