112 LICHENACEI. [BHOMYCES. 
This is at once distinguished by the colour and form of the apothecia 
and by their internal structure. The thallus, when sterile, often spreads 
extensively, and is then more continuous and aspersed with large rosy- 
white or white cephalodine granules, when it is Variolaria terricola Tayl. 
in Mack. Fl. Hib. ii. p. 115. The apothecia are not common in this 
country ; but the spermogones are frequent on otherwise barren thalli. 
They are somewhat large, tuberculiform, at first covered by the cortical 
layer, the conceptacle blackish above, with elongate jointed sterigmata 
and straight spermatia 0,005 mm. long, scarcely 0,001 mm. thick. 
Hab. On sterile gravelly or turfy soil on upland moorlands.—Distr. 
General, though not common in a fertile state, in most of the moun- 
tainous and more hilly tracts of Great Britain and Ireland.—B. M.: 
Suffolk; Epping Forest, Essex; Toy Hill, Kent; Lyndhurst Moor, 
Hants; St. Breock Down and Tregawn, Cornwall; Montgomeryshire ; 
Cader Idris, near Barmouth, and Aberdovey, Merionethshire; Wapley 
Hill, Herefordshire ; Cleveland, Yorkshire ; the Cheviots, Northumber- 
land. New Galloway, Kirkcudbrightshire; Leadhills, Lanarkshire ; 
Achosragan Hill, Appin, Argyleshire; Sheriffmoor, Stirling: Glen 
Lochay, Ben More, Craig Tulloch, and Ben Lawers, Perthshire; Baldovan 
Woods and Sidlaw Hills, Forfarshire; Glen Dee, Braemar, Aberdeen- 
shire ; Glen Nevis, Inverness-shire. Near Clonmel, Co. Tipperary. 
B. ICMADOPHILA (Trevis. in Mass. Rich. (1852) p. 26).—Apo- 
thecia sessile, lecanoroid, at length biatorine, solid within. 
| 
leh 
S 
Fig. 31. 
Beomyces eruginosus DC.—a. Section of an apothecium (in dry state), x30. 
6. Two thece and a paraphysis, x350. ¢. Spores, x500. d. Section of a 
spermogone, X30. e. Sterigmata and spermatia, x 500. 
